MerCruiser MCM 3.0L Important Information Manual
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MerCruiser MCM 3.0L Important Information Manual

MerCruiser MCM 3.0L Important Information Manual

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IMPORTANT INFORMATION
1
B
50617
MAINTENANCE
Index

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Summary of Contents for MerCruiser MCM 3.0L

  • Page 1 IMPORTANT INFORMATION 50617 MAINTENANCE Index...

  • Page 2: Table Of Contents

    Table of Contents Page Page Checking Engine Oil Level/Filling ..1B - 9 Maintenance Schedule ....1B - 1 Changing Oil and Filter .

  • Page 3: Maintenance Schedule

    Maintenance Schedule Always disconnect battery cables from battery BEFORE working around electrical system components to prevent injury to yourself and damage to electrical system should a wire be accidentally shorted. To Be Done by Owner TASK INTERVAL Cooling System - Flush seawater section Saltwater: After each use Seawater strainer Clean as required...

  • Page 4: Maintenance Schedule (Continued)

    Maintenance Schedule (Continued) To Be Done by Dealer TASK INTERVAL 20–Hour checkup (NOTE 1) 20 hours Whenever insufficient seawater flow is Seawater pickup pump - disassemble and inspect suspected. (if operating temperature exceeds normal range) Flame arrestor and crankcase ventilation hose - clean and inspect Stern drive unit oil - change Gimbal ring clamping screws - retorque to 40 lb.

  • Page 5: Tune-Up Specifications

    Tune-Up Specifications Model MCM 3.0L MCM 3.0LX Propshaft Horsepower Ratings 115 (86) 135 (101) (Kilowatts) Number Of Cylinders Displacement 181 CID (3.0L) Bore/Stroke 4.00 in./3.60 in. (101.6/91.4 mm) Compression Ratio 9.25:1 Compression Pressure 140 PSI (966 kPa) Idle RPM (in Forward Gear) 650-700 Maximum RPM (at W.O.T.)

  • Page 6: Fluid Capacities

    Fluid Capacities NOTICE All capacities are approximate fluid measures. MCM (Stern Drive) Model All Models Crankcase Oil (with filter) 4 U.S. Qts. (3.8 L) Seawater Cooling System 9 U.S. Qts. (3.8 L) Closed Cooling System 9 U.S. Qts. (8.5 L) Always use dipstick to determine exact quantity of oil required Seawater cooling system capacity information is for winterization use only Index...

  • Page 7: Cylinder

    After 20 Hour Break-In Period Retorque gimbal ring clamping U-bolt to 55 lb. ft. (74 N·m). To help extend the life of your MerCruiser power package, the following recommendations should be considered: Use a propeller that allows the engine to operate at...

  • Page 8: Fuel, Oil, Fluid, And Coolant Specifications

    The adverse effects of alcohol are more severe with engine and is not covered under MerCruiser War- methyl alcohol (methanol) and are worse with in- ranty.

  • Page 9: Gasoline/Alcohol Blends

    ETHANOL. Alcohol is also more severe in older en- age resulting from the use of gasoline-alcohol gines since newer engines have materials which are blended fuels are not the responsibility of MerCruiser more resistant to alcohol. and will not be covered under our warranty.

  • Page 10: Crankcase Oil

    Crankcase Oil Tools Required To help obtain optimum engine performance and to provide maximum protection, we strongly recom- mend the use of Quicksilver 4-Cycle Marine Engine Oil. If not available, a good grade, straight weight, de- tergent automotive oil of correct viscosity, with an API classification of SF or SG, may be used.

  • Page 11: Coolant For Closed Cooling System

    6. Remove oil filler cap from valve rocker arm cover. arm “clatter” on MerCruiser engines. The over-full 7. Add required amount of oil to bring level up to, but condition results in the engine crankshaft splashing not over, the FULL mark on dipstick.

  • Page 12: Maintaining Power Steering Pump Fluid Level

    6. Coat sealing ring on new filter with engine oil, and 3. Level should be between the FULL HOT mark install. Tighten filter securely (following filter man- and ADD mark on dipstick. ufacturer’s instructions). Do not over-tighten. 72518 a - Proper Fluid Level with Engine Warm 4.

  • Page 13: Filling And Bleeding Power Steering System

    Filling and Bleeding Power Maintaining Closed Cooling Steering System Coolant Level WARNING IMPORTANT: Power steering system must be Allow engine to cool down before removing pres- filled exactly as explained in the following to be sure cap. Sudden loss of pressure could cause sure that all air is bled from the system.
  • Page 14 WARNING CAUTION When flushing cooling system with boat out of If cooling system is to be flushed with boat in the the water, be certain that area in vicinity of propel- water, seacock (if so equipped) must be closed, ler is clear and that no person is standing nearby. or water inlet hose must be disconnected and As a precautionary measure, it is recommended plugged to prevent water from flowing into boat.

  • Page 15: Lubrication

    Lubrication CAUTION Watch temperature gauge at dash to ensure the Lubricate pivot points with SAE 30W motor oil and engine does not overheat. cable guide contact surfaces with Quicksilver 2-4-C Marine Lubricant with Teflon. 4. Operate engine at idle speed in NEUTRAL gear for 10 minutes or until discharge water is clear, Throttle Cable then stop engine.

  • Page 16: Engine Coupler/U-Joint Shaft Splines

    NOTE: Refer to MerCruiser Stern Drive Service Man- ual for stern drive unit removal and installation if nec- Fresh Water Areas - Every 50 Hours of operation essary.

  • Page 17: Layup

    CAUTION CAUTION Seawater section of cooling system MUST BE A discharged battery can be damaged by freez- COMPLETELY drained for winter storage, or im- ing. mediately after cold weather use, if the possibility of freezing temperatures exists. Failure to com- Layup ply may result in trapped water causing freeze and/or corrosion damage to engine.

  • Page 18: Draining Instructions

    13. Clean outside of engine and repaint any areas re- 3. Repeatedly clean out drain holes using a stiff quired with Quicksilver Primer and Spray Paint. piece of wire. Do this until entire system is After paint has dried, spray Quicksilver Corrosion drained.
  • Page 19 If NOT equipped with sea- cock: seawater inlet hose must remain discon- nected and plugged until engine is to be restarted. IMPORTANT: MerCruiser recommends that pro- pylene glycol antifreeze (nontoxic and biode- gradable, which makes it friendly to lakes and riv- ers) be used in sea-water section of the cooling system for cold weather or extended storage.

  • Page 20: Draining Seawater Section Of Closed Cooled (Coolant) Models

    Draining Seawater Section of Closed 5. If equipped with 3 in. (76 mm) or 6 in. (152 mm) risers, remove drain plug as shown from riser. Cooled (Coolant) Models NOTICE Refer to “Cold Weather or Extended Storage,” “Precautions,” in this section, BEFORE proceeding.

  • Page 21: Recommissioning

    8. Insert a small wire (repeatedly) to make sure that 10. After seawater section of cooling system has vent holes and water drain holes and passages been drained completely, coat threads of drain (as shown) are unobstructed and open. plugs with Quicksilver Perfect Seal and reinstall. Tighten drain plugs securely.

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