MerCruiser Scorpion 350 User Manual

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Page 1 Module H of Directive 2003/44/EC is: Det Norske Veritas Norway Notified Body Number: 0575 This declaration is issued under the sole responsibility of Mercury Marine and Mercury MerCruiser. Patrick C. Mackey President ‑ Mercury Marine, Fond du Lac, WI USA...
Page 2 Exhaust Gas Emissions Certification Number The serial numbers are the manufacturer’s keys to numerous engineering details that apply to your Mercury MerCruiser® power package. When contacting your Authorized Mercury MerCruiser Dealer about service, always specify model and serial numbers. The description and specifications contained herein were in effect at the time this guide was approved for printing.
Page 3: Read This Manual Thoroughly
We suggest that this manual remain with the product for ready reference whenever you are on the water. Thank you for purchasing one of our Mercury MerCruiser products. We sincerely hope your boating will be pleasant!
Page 4 NOTICE Indicates a situation which, if not avoided, could result in engine or major component failure. IMPORTANT: Identifies information essential to the successful completion of the task. NOTE: Indicates information that helps in the understanding of a particular step or action. WARNING The operator (driver) is responsible for the correct and safe operation of the boat, the equipment aboard and the safety of all occupants aboard.
Page 5: Table Of Contents
Government Application Warranty Chart....9 Mercury Product Protection Plan: United States and Mercury Installation Quality Certification Program. .9 Canada..............3 Emission Control Information Label.......10 Mercury MerCruiser Limited Warranty Owner Responsibility........11 (Gasoline‑Fueled Products Only) ......4 Section 2 - Getting to Know Your Power Package Identification............14 Console Mount Features......18...
Page 6 Section 4 - Specifications Fuel Requirements..........36 Engine Oil.............37 Fuel Ratings.............36 Engine Specifications...........38 Using Reformulated (Oxygenated) Gasolines Fluid Specifications..........38 (USA Only)............36 Engine..............38 Gasolines Containing Alcohol......36 Transmission........... 38 Section 5 - Maintenance Owner/Operator Responsibilities......40 Changing............48 Dealer Responsibilities.........40 IAC Muffler............48 Maintenance............40 Changing............
Page 7 Section 7 - Troubleshooting Diagnosing EFI Problems........84 Excessive Engine Temperature......85 Engine Guardian System........84 Insufficient Engine Temperature......85 Starter Motor Will Not Crank Engine, Or Cranks Low Engine Oil Pressure........86 Slow..............84 Battery Will Not Recharge........86 Engine Will Not Start or Is Hard to Start....84 Remote Control Is Difficult to Move, Has Excessive Engine Runs Rough, Misses, or Backfires...85 Play, or Makes Unusual Sounds......86...
Page 8 Page iv 90-865253071 NOVEMBER 2007...
Page 9: Section 1 - Warranty
Government Application Warranty Chart ..9 Mercury Product Protection Plan: United States and Mercury Installation Quality Certification Program Canada..............3 ................9 Mercury MerCruiser Limited Warranty (Gasoline- Emission Control Information Label....10 Fueled Products Only) ......... 4 Owner Responsibility ........11 90-865253071 NOVEMBER 2007...
Page 10: Warranty Registration: United States And Canada
A temporary Owner Warranty Registration Card will be presented to you when you purchase the product. Upon receipt of the Warranty Registration Card at the factory, Mercury MerCruiser will send you an owner resource guide that includes your warranty registration confirmation. If you do not receive your owner resource guide within 60 days from date of new product sale, please contact your selling dealer.
Page 11: Transfer Of Warranty
Section 1 - Warranty The warranty registration card identifies your name and address, product model and serial numbers, date of sale, type of use, and the selling distributor’s and dealer’s code number, name, and address. The distributor or dealer also certifies that you are the original purchaser and user of the product.
Page 12: Mercury Mercruiser Limited Warranty (Gasoline-Fueled Products Only)
One‑, two‑, three‑, four‑, or five‑ year term plans can be purchased up to 12 months after the original engine registration date. See your participating Mercury MerCruiser dealer for complete program details. Mercury MerCruiser Limited Warranty (Gasoline‑Fueled Products Only)
Page 13 Section 1 - Warranty Conditions That Must Be Met in Order to Obtain Warranty Coverage Warranty coverage is available only to retail customers that purchase from a dealer authorized by Mercury Marine to distribute the product in the country in which the sale occurred, and then only after the pre‑delivery inspection process specified by Mercury Marine is completed and documented.
Page 14: 3-Year Limited Warranty Against Corrosion
Mercury Marine warrants that each new Mercury, Mariner, Mercury Racing, Sport Jet, M Jet Drive, Tracker by Mercury Marine Outboard, MerCruiser Inboard or Sterndrive engine (Product) will not be rendered inoperative as a direct result of corrosion for the period of time described below.
Page 15: Global Warranty Charts
Section 1 - Warranty This limited warranty does not cover electrical system corrosion; corrosion resulting from damage, corrosion which causes purely cosmetic damage, abuse or improper service; corrosion to accessories, instruments, steering systems; corrosion to factory installed jet drive unit; damage due to marine growth; product sold with less than a one year limited Product warranty;...
Page 16: Commercial Application Warranty Chart
Section 1 - Warranty Commercial Application Warranty Chart Limited Corrosion Commercial Application: Standard Factory Limited Warranty by Region & Boat Brand Warranty Non-Certified Boat Brand Certified Boat Brand All Boat Brands Vazer, Standard Vazer and Vazer and Models, Models Models Scorpion Scorpion and and...
Page 17: Government Application Warranty Chart
Section 1 - Warranty Government Application Warranty Chart Limited Corrosion Government Application: Standard Factory Limited Warranty by Region & Boat Brand Warranty Non-Certified Boat Brand Certified Boat Brand All Boat Brands Vazer, Standard Vazer and Vazer and Models, Models Models Scorpion Scorpion and and...
Page 18: Emission Control Information Label
A tamper‑resistant Emission Control Information label is affixed in a visible location to the engine at time of manufacture by Mercury MerCruiser. In addition to the required emissions statement, the label lists the engine serial number, family, STD (emission standard/level), date of manufacture (month, year), and the engine displacement.
Page 19: Owner Responsibility
Section 1 - Warranty NOTE: When the CE mark is present in the lower right corner of the Emission Control Information Label on the engine, the Declaration of Conformance applies. Refer to the front page of this manual for further information. EMISSION CONTROL INFORMATION THIS ENGINE CONFORMS TO XXXX CALIFORNIA EMISSION...
Page 20 Section 1 - Warranty Notes: Page 12 90-865253071 NOVEMBER 2007...
Page 21: Section 2 - Getting To Know Your Power Package
Section 2 - Getting to Know Your Power Package Section 2 - Getting to Know Your Power Package Table of Contents Identification............14 Console Mount Features ......18 Engine Serial Number Decal......14 Zero Effort Features........18 Lanyard Stop Switch........... 14 Electrical System Overload Protection....19 Instrumentation...........
Page 22: Identification
Section 2 - Getting to Know Your Power Package Identification The serial numbers are the manufacture's keys to numerous engineering details which apply to your MerCruiser power package. When contacting MerCruiser about service, always specify model and serial numbers. Engine Serial Number Decal The serial number and specifications decals are located on the engine cover (plenum).
Page 23: Instrumentation
Section 2 - Getting to Know Your Power Package • poor operating practices • sitting on the seat or gunwale at planing speeds • standing at planing speeds • operating at planing speeds in shallow or obstacle infested waters • releasing your grip on the steering wheel that is pulling in one direction •...
Page 24: Analog Gauges
Section 2 - Getting to Know Your Power Package SmartCraft digital gauges also feature troll control. This allows a vessel to maintain a constant speed with an engine speed between 500 and 1200 RPM. 26238 SmartCraft gauges Tachometer LCD system view display Speedometer The SmartCraft instrument package also aids in Engine Guardian diagnostics.
Page 25: Remote Controls
Section 2 - Getting to Know Your Power Package Reference Gauge Function Fuel gauge Indicates quantity of fuel in tank. Hour meter Records engine operating time. Bilge blower switch Operates the bilge blower. Ignition switch Allows the operator to start and stop engine. Power trim gauge Indicates sterndrive angle (trim up [out] and down [in]).
Page 26: Console Mount Features
Section 2 - Getting to Know Your Power Package CONSOLE MOUNT FEATURES 17356 Throttle Only Button Control Handle Throttle Only Button - Allows engine throttle advancement without shifting the engine. This is done by disengaging the shift mechanism from the control handle. The throttle only button can be depressed only when the remote control handle is in the neutral position.
Page 27: Electrical System Overload Protection
Section 2 - Getting to Know Your Power Package Throttle Lever - Throttle functions are controlled by the movement of the throttle lever. Increase the RPM by moving the throttle lever forward. Achieve Wide Open Throttle (WOT) by placing the throttle lever in its full forward position. Decrease RPM by moving the throttle lever back.
Page 28: Audio Warning System
Audio Warning System Your Mercury MerCruiser power package may be equipped with an Audio Warning System. The Audio Warning System will not protect the engine from damage. It is designed to warn the operator that a problem has occurred.
Page 29: Testing The Audio Warning System
Section 2 - Getting to Know Your Power Package If the alarm sounds, stop the engine immediately. Investigate cause and correct it, if possible. If the cause cannot be determined, contact your authorized Mercury MerCruiser dealer. Testing The Audio Warning System 1.
Page 30 Section 2 - Getting to Know Your Power Package Notes: Page 22 90-865253071 NOVEMBER 2007...
Page 31: Section 3 - On The Water
Section 3 - On the Water Section 3 - On the Water Table of Contents Safe Boating Suggestions........24 Passenger Safety in Pontoon Boats and Deck Boats Be Alert to Carbon Monoxide Poisoning..... 25 ................29 Good Ventilation ........... 25 Boats Having An Open Front Deck ....
Page 32: Safe Boating Suggestions
Most boats are rated and certified for maximum load (weight) capacities (refer to your boat capacity plate). Know your boat's operating and loading limitations. Know if your boat will float if full of water. When in doubt, contact your authorized Mercury MerCruiser dealer or the boat manufacturer.
Page 33: Be Alert To Carbon Monoxide Poisoning
Section 3 - On the Water • Do not allow anyone to sit or ride on any part of the boat that was not intended for such use. This includes the backs of seats, gunwales, transom, bow, decks, raised fishing seats and any rotating fishing seat;...
Page 34: Poor Ventilation
Section 3 - On the Water 1. Example of desired air flow through the boat. mc79553-1 Poor Ventilation Under certain conditions, permanently enclosed or canvas enclosed cabins or cockpits with insufficient ventilation may draw in carbon monoxide. Install one or more carbon monoxide detectors in your boat.
Page 35: Starting And Stopping The Scorpion Engine
Section 3 - On the Water Operation Chart WHILE BEFORE STARTING AFTER STARTING AFTER STOPPING UNDERWAY Flush cooling system if in Open fuel shut off valve. saltwater. Open seacock, if equipped. Drain bilge. Close the drain system. Check the engine oil. Perform all other checks specified by your dealer and/or boat builder.
Page 36: Stopping The Engine
Components on your engine will be damaged if submerged. Damage caused by submersion is not covered by the Mercury MerCruiser Limited Warranty.
Page 37: While Boat Is Stationary
Section 3 - On the Water Always slow down and exercise extreme caution any time you are boating in an area where there might be people in the water. Whenever a boat is moving (even coasting) and the gear shift is in neutral, there is sufficient force by the water on the propeller to cause the propeller to rotate.
Page 38: Boats With Front-Mounted, Raised Pedestal Fishing Seats
Section 3 - On the Water Boats With Front‑Mounted, Raised Pedestal Fishing Seats Elevated fishing seats are not intended for use when the boat is traveling faster than idle or trolling speed. Sit only in seats designated for traveling at faster speeds. Any unexpected, sudden reduction in boat speed could result in the elevated passenger falling over the front of the boat.
Page 39: Conditions Affecting Operation
After striking a submerged object, stop the engine as soon as possible and inspect the drive system for any broken or loose parts. If damage is present or suspected, the power package should be taken to an authorized Mercury MerCruiser dealer for a thorough inspection and necessary repair.
Page 40: Cavitation
Section 3 - On the Water Cavitation Cavitation occurs when water flow cannot follow the contour of a fast‑moving underwater object such as a gear housing or a propeller. Cavitation increases propeller speed while reducing boat speed. Cavitation can seriously erode the surface of the gear housing or the propeller.
Page 41: Getting Started
End of First Season Checkup At the end of the first season of operation, contact an authorized Mercury MerCruiser dealer to discuss and/or perform scheduled maintenance items. If you are in an area where the product is operated continuously, year‑round, you should contact your dealer at the end of the first 100 hours of operation or once yearly, whichever occurs first.
Page 42 Section 3 - On the Water Notes: Page 34 90-865253071 NOVEMBER 2007...
Page 43 Section 4 - Specifications Section 4 - Specifications Table of Contents Fuel Requirements..........36 Engine Oil............37 Fuel Ratings ..........36 Engine Specifications......... 38 Using Reformulated (Oxygenated) Gasolines Fluid Specifications..........38 (USA Only) ........... 36 Engine ............38 Gasolines Containing Alcohol ...... 36 Transmission ..........
Page 44: Fuel Requirements
The fuel system components on your Mercury MerCruiser engine will withstand up to 10% alcohol content in the gasoline. We do not know what percentage your boat's fuel system will withstand.
Page 45: Engine Oil
All MerCruiser engines Mercury MerCruiser Full‑Synthetic Engine Oil, 20W‑40, NMMA FC‑W rated If the Mercury MerCruiser Full‑Synthetic, 20W‑40 oil is unavailable, you can use the following lubricants, listed in order of recommendation: 1. Mercury/Quicksilver 25W‑40 Synthetic Blend, NMMA FC‑W–rated 4‑cycle MerCruiser 2.
Page 46: Engine Specifications
Fluid Specifications Engine IMPORTANT: All capacities are approximate fluid measures. All Models Capacity Fluid Type Mercury MerCruiser Full‑Synthetic Engine Engine oil (with filter) 4.25 L (4.5 US qt) Oil, 20W‑40 Seawater cooling system (winterization 20 L (21 US qt) Propylene Glycol and purified water...
Page 47: Section 5 - Maintenance
Section 5 - Maintenance Section 5 - Maintenance Table of Contents Owner/Operator Responsibilities......40 IAC Muffler............48 Dealer Responsibilities........40 Changing ............48 Maintenance............40 Cleaning The Flame Arrestor......48 Do-It-Yourself Maintenance Suggestions... 41 Positive Crankcase Ventilation Valve Inspection............41 (PCV) ............
Page 48: Owner/Operator Responsibilities
• Ensure that the boat is properly equipped. • Prior to delivery, make certain that the Mercury MerCruiser power package and other equipment are in proper operating condition. • Make all necessary adjustments for maximum efficiency. •...
Page 49: Do-It-Yourself Maintenance Suggestions
Transmission (inboard models only) Do‑It‑Yourself Maintenance Suggestions Present day marine equipment, such as your Mercury MerCruiser power package, are highly technical pieces of machinery. Electronic ignition and special fuel delivery systems provide greater fuel economies, but also are more complex for the untrained mechanic.
Page 50: Maintenance Schedule-Inboard
• Clean the flame arrestor, IAC muffler (MPI engines), and the crankcase annually ventilation hoses. Inspect the PCV valve, if equipped. On MerCruiser V6 (whichever occurs first) models, the PCV valve is a non‑serviceable, internal component of the valve cover assembly.
Page 51: Maintenance Log
Section 5 - Maintenance Task Interval Maintenance to Be Performed • Replace the coolant/anitifreeze. Replace every two years if not using Every 5 years extended‑life coolant/antifreeze. Maintenance Log Record all maintenance performed on your power package here. Be sure to save all work orders and receipts.
Page 52: Filling
Section 5 - Maintenance NOTE: Ensure that dipstick is installed with oil level indication marks facing the rear of the engine (flywheel end). 10718 Dipstick tube IMPORTANT: Add the specified engine oil to bring the level up to, but not over, the full or OK range mark on the dipstick.
Page 53: Changing Oil And Filter
Capacity Fluid Type 4.25 L Engine oil (with filter) Mercury MerCruiser Full‑Synthetic Engine Oil, 20W‑40 (4.5 US qt) Changing Oil and Filter Refer to the Maintenance schedule for the change interval. Engine oil should be changed before placing the boat in storage.
Page 54: Engine Oil Drain Pump
Section 5 - Maintenance 3. Pull tether through the bilge drain. 7284 Bilge drain plug Oil drain hose plug Tether Oil drain hose Clip Bilge drain flange 4. Place the oil drain hose in a suitable container. 5. Remove the drain plug from the oil drain hose. 6.
Page 55: Changing Filter
NOTE: Adding 0.95 L (1 qt) of engine oil will raise the level from the add mark to the top of the OK range. Models Capacity Fluid Type 4.25 L Engine oil (with filter) Mercury MerCruiser Full‑Synthetic Engine Oil, 20W‑40 (4.5 US qt) 90-865253071 NOVEMBER 2007 Page 47...
Page 56: Transmission Fluid
3. Remove the dipstick, observe the fluid level and mark the cold fluid level. 4. Reinstall the dipstick, tighten the T‑handle securely. Do not overtighten. Changing Contact your authorized Mercury MerCruiser dealer. IAC Muffler Changing Contact your authorized Mercury MerCruiser dealer.
Page 57: Positive Crankcase Ventilation Valve (Pcv)
9. Install the engine cover. Positive Crankcase Ventilation Valve (PCV) CHANGING IMPORTANT: Use only Mercury MerCruiser replacement parts to ensure compliance with emission regulations. NOTE: On V6 models the PCV valve is non‑serviceable and is an internal component of the valve cover.
Page 58: Changing Water Separating Fuel Filter
Always check for leaks before attempting to start the engine and wipe up any spilled fuel immediately. 1. Allow the engine to cool down. NOTE: Mercury MerCruiser recommends that the engine be shut off for 12 hours prior to filter removal. 2. Close fuel supply valve, if equipped.
Page 59: In-Line Fuel Filter
Always check for leaks before attempting to start the engine and wipe up any spilled fuel immediately. 1. Allow the engine to cool down. NOTE: Mercury MerCruiser recommends that the engine be shut off for 12 hours prior to filter removal. 2. Close fuel supply valve, if equipped.
Page 60 Section 5 - Maintenance 6. Apply sealant to the male pipe threads on the connectors. Tube Ref No. Description Where Used Part No. Loctite 567 PST Pipe Sealant Male threads 92-809822 7. Torque each connector using a backup wrench on the hex fitting nearest to the connector.
Page 61: Lubrication
14. Start the engine. Check for gasoline leaks around the fuel filter assembly. If leaks exist, stop the engine immediately. Recheck the filter installation, clean spilled fuel and properly ventilate the engine compartment. If leaks continue, stop engine immediately and contact your authorized Mercury MerCruiser dealer. Lubrication Throttle Cable 1.
Page 62 1. Lubricate the detent ball and the holes in the shift lever. 10724 In‑Line Transmission Tube Ref. No. Description Where Used Part No. Synthetic Blend MerCruiser Engine Detent ball and shift lever 92‑883725K01 Oil SAE25W‑40 holes 2. Lubricate the shift cable pivot points. 5935 Pivot points Tube Ref.
Page 63: Serpentine Drive Belt
Section 5 - Maintenance Serpentine Drive Belt WARNING Inspecting the belts with the engine running may cause serious injury or death. Turn off the engine and remove the ignition key before adjusting tension or inspecting belts. 6089 Idler pulley Alternator pulley Circulating pump pulley Seawater pump pulley Crankshaft pulley...
Page 64: Flushing The Power Package-Tow Sports
Section 5 - Maintenance 5. Use a 8 mm (5/16 in.) socket and tighten adjusting the stud to adjust the belt deflection. 6. Using one of the 2 methods following, check for correct deflection. Push down with moderate thumb pressure on the longest stretch of belt. Proper deflection is 13 mm (1/2 in.).
Page 65 Section 5 - Maintenance Close the seacock, if equipped, and then disconnect the seawater inlet hose from the transmission seawater inlet fitting. If not equipped with a seacock, disconnect the seawater inlet hose from the transmission seawater inlet fitting and plug the seawater inlet hose. 6091 Using appropriate connector, connect the flushing water hose to the transmission seawater inlet fitting.
Page 66: The Boat In The Water
Section 5 - Maintenance NOTICE Operating the engine out of the water at high speeds creates suction, which can collapse the water supply hose and overheat the engine. Do not operate the engine above 1400 RPM out of the water and without sufficient cooling water supply. 6.
Page 67 Section 5 - Maintenance If not equipped with a seacock, disconnect the seawater inlet hose from the transmission seawater inlet fitting and immediately plug the seawater inlet hose to prevent water from siphoning into the engine or boat. 6091 Using suitable adapter, connect the flushing water hose to the transmission seawater inlet fitting.
Page 68: Battery
Section 5 - Maintenance 5. Immediately start the engine. NOTICE Operating the engine out of the water at high speeds creates suction, which can collapse the water supply hose and overheat the engine. Do not operate the engine above 1400 RPM out of the water and without sufficient cooling water supply.
Page 69 Section 5 - Maintenance EFI Electronic Control Module (ECM): The ECM requires a stable voltage source. During multiple engine operation, an onboard electrical device may cause a sudden drain of voltage at the engine's battery. The voltage may go below the ECM's minimum required voltage.
Page 70 Section 5 - Maintenance Notes: Page 62 90-865253071 NOVEMBER 2007...
Page 71: Section 6 - Storage
Section 6 - Storage Section 6 - Storage Table of Contents Cold Weather or Extended Storage....64 Boat out of the Water ......71 Preparing Power Package for Storage..64 Manual Single-Point Drain System....73 Engine and Fuel System Preparation ..65 Boat in the Water ........
Page 72: Cold Weather Or Extended Storage
Section 6 - Storage Cold Weather or Extended Storage IMPORTANT: Mercury MerCruiser strongly recommends that this service should be performed by an authorized Mercury MerCruiser dealer. Damage caused by freezing temperatures IS NOT covered by the Mercury MerCruiser Limited Warranty. NOTICE Water trapped in the seawater section of the cooling system can cause corrosion or freeze damage.
Page 73: Engine And Fuel System Preparation
Section 6 - Storage 8. For additional assurance against freezing and rust, after draining, fill the seawater cooling system with propylene glycol mixed to the manufacturer's recommendation to protect engine to the lowest temperature to which it will be exposed during freezing temperatures or extended storage.
Page 74: Draining The Seawater System
Identification to determine which instructions apply to your power package. IMPORTANT: The engine must not be operating at any point during the draining procedure. IMPORTANT: Mercury MerCruiser requires that propylene glycol antifreeze, mixed to the manufacturer's instructions, be used in the seawater section of the cooling system for freezing temperatures or extended storage.
Page 75: Manual Single Point Drain System
Section 6 - Storage 21125 Scorpion Models Blue air pump Green indicators Air manifold Blue drain plug locations MANUAL SINGLE POINT DRAIN SYSTEM 6128 Blue handle Blue drain plug location THREE POINT MANUAL DRAIN SYSTEM 6126 Blue drain plug 90-865253071 NOVEMBER 2007 Page 67...
Page 76: Multi-Point Drain (Mpd) System
Section 6 - Storage MULTI-POINT DRAIN (MPD) SYSTEM 6129 Side of cylinder block Bottom of exhaust manifolds 6130 Water circulating pump hose Fuel cooler to thermostat housing 6131 Check valve (if equipped) Air‑Actuated Single‑Point Drain System BOAT IN THE WATER NOTE: This procedure is written for the air pump that is attached to the engine.
Page 77 Section 6 - Storage 5. Pull lever on air pump (vertical) to lock pump on the fitting. 8293 Actuator fitting Air pump Green indicators Lever (locking) Manual release valve 6. Pump air into the system until both green indicators extend and water drains from both sides of the engine.
Page 78 12. Remove the air pump from the air manifold and return it to the mounting bracket. 13. Mercury MerCruiser recommends leaving the drain system open while transporting the boat or while performing other maintenance. This helps ensure that all water is drained.
Page 79: Boat Out Of The Water
Section 6 - Storage 14. Before launching the boat, pull up on the manual release valve. Verify that the green indicators are no longer extended. 6135 Green indicators 15. Open the seacock, if equipped, or unplug and reconnect the water inlet hose prior to operating the engine.
Page 80 Section 6 - Storage 6. Pump air into the system until both green indicators extend and water drains from both sides of the engine. The port side will begin draining before the starboard side. 6125 6124 Closed Cooled Models Seawater Cooled Models Blue drain plug location Air manifold Blue air pump...
Page 81: Manual Single-Point Drain System
10. Remove the air pump from the air manifold and return it to the mounting bracket. 11. Mercury MerCruiser recommends leaving the drain system open while transporting the boat or while performing other maintenance. This helps ensure that all water is drained.
Page 82: Boat Out Of The Water
Section 6 - Storage 4. Visually verify that water is draining. If water does not drain, remove the blue drain plug from the distribution housing and drain manually. 6137 Drain location ‑ orange or red Blue drain plug 5. Allow the system to drain for a minimum of five minutes. We recommend leaving the drain system open while transporting the boat or performing other maintenance.
Page 83: Three Point Manual Drain System
Section 6 - Storage 3. Visually verify that water is draining. If water does not drain, remove the blue drain plug from the distribution housing and drain manually. 6137 Drain location ‑ orange or red Blue drain plug 4. Allow the system to drain for a minimum of five minutes. We recommend leaving the plugs out while transporting the boat or performing other maintenance to ensure that all water is drained.
Page 84: Boat Out Of The Water
Blue drain plugs 5. Verify that water is draining from each opening. 6. Allow the system to drain for a minimum of five minutes. Mercury MerCruiser recommends leaving the drain system open while transporting the boat or while performing other maintenance to ensure that all water is drained.
Page 85: Multi-Point Drain (Mpd) System
Blue drain plug 3. Verify that water is draining from each opening. 4. Allow the system to drain for a minimum of five minutes. Mercury MerCruiser recommends leaving the drain system open while transporting the boat or while performing other maintenance to ensure that all water is drained.
Page 86 Section 6 - Storage Water‑circulating pump hose 6143 Drain plug Fuel‑cooler‑to‑thermostat‑housing hose 6144 Drain plug Check valve 6131 Drain plug (if equipped) Page 78 90-865253071 NOVEMBER 2007...
Page 87: Boat In The Water
Section 6 - Storage 3. On models with a seawater pickup pump, remove the two blue drain plugs. If the seawater pickup pump does not have blue drain plugs, or you are unable to access them, loosen the clamps and remove both hoses. 6145 Hose clamps Blue drain plugs...
Page 88 Section 6 - Storage Water‑circulating pump hose 6143 Drain plug Fuel‑cooler‑to‑thermostat‑housing hose 6144 Drain plug Check valve 6131 Drain plug (if equipped) Page 80 90-865253071 NOVEMBER 2007...
Page 89: Battery Storage
Section 6 - Storage 3. On models with a seawater pickup pump, remove the two blue drain plugs. If the seawater pickup pump does not have blue drain plugs, or you are unable to access them, loosen the clamps and remove both hoses. 6145 Hose clamps Blue drain plugs...
Page 90: November
Section 6 - Storage Notes: Page 82 90-865253071 NOVEMBER 2007...
Page 91 Section 7 - Troubleshooting Section 7 - Troubleshooting Table of Contents Diagnosing EFI Problems........84 Excessive Engine Temperature......85 Engine Guardian System........84 Insufficient Engine Temperature......85 Starter Motor Will Not Crank Engine, Or Cranks Low Engine Oil Pressure........86 Slow..............
Page 92: Diagnosing Efi Problems
Section 7 - Troubleshooting Diagnosing EFI Problems Your authorized Mercury MerCruiser dealer has the proper service tools for diagnosing problems on Electronic Fuel Injection (EFI) Systems. The Electronic Control Module (ECM) on these engines has the ability to detect some problems with the system when they occur, and store a Trouble Code in the ECM's memory.
Page 93: Excessive Engine Temperature
Boat bottom fouled or damaged. Clean or repair as necessary. Ignition problem. See Engine Runs Rough, Misses or Backfires. Engine overheating. See Excessive Engine Temperature. Have EFI System checked by an authorized Mercury MerCruiser EFI System fault dealer. Excessive Engine Temperature Possible Cause Remedy Water inlet or seacock closed.
Page 94: Low Engine Oil Pressure
Loose or missing shift and throttle linkages. see authorized Mercury MerCruiser dealer immediately. Straighten cable or have authorized Mercury Shift or throttle cable kinked. MerCruiser dealer replace cable if damaged beyond repair. Steering Wheel Jerks or Is Difficult to Turn Possible Cause Remedy Low power steering pump fluid level.
Page 95: Section 8 - Customer Assistance Information
Section 8 - Customer Assistance Information Section 8 - Customer Assistance Information Table of Contents Owner Service Assistance........88 Parts and Accessories Inquiries ..... 89 Local Repair Service ........88 Resolving a Problem ........89 Service Away From Home ......88 Mercury Marine Service Offices ....
Page 96: Owner Service Assistance
Owner Service Assistance Local Repair Service If you need service for your Mercury MerCruiser–powered boat, take it to your authorized dealer. Only authorized dealers specialize in Mercury MerCruiser products and have factory‑trained mechanics, special tools and equipment, and genuine Quicksilver parts and accessories to properly service your engine.
Page 97: Parts And Accessories Inquiries
Resolving a Problem Satisfaction with your Mercury MerCruiser product is very important to your dealer and to us. If you ever have a problem, question or concern about your power package, contact your dealer or any authorized Mercury MerCruiser dealership.
Page 98: Ordering Literature
• Year built United States and Canada For information on additional literature that is available for your particular Mercury MerCruiser power package and how to order that literature contact your nearest dealer or contact Mercury Marine Publications P.O. Box 1939...

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Scorpion 377

MerCruiser Scorpion 350 User Manual

Table of Contents

Section 1 - Warranty 1

Section 2 - Getting to Know Your Power Package 2

Section 3 - on the Water

Section 4 - Specifications

Section 5 - Maintenance

Section 6 - Storage

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