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Summary of Contents for Parsun T25BM JET
- Page 1 OUTBOARD MOTORS OWNER’S MANUAL T25BM JET T30BM JET...
- Page 2 SUZHOU PARSUN POWER MACHINE CO., LTD. Before Operating Outboards WARNING： Read this manual carefully. Learn the difference in handling characteristics between a jet drive outboard motor and a propeller driven outboard motor. If you have any questions, contact your dealer.
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Page 3: Table Of Contents
Table of contents 1. Main components and General information ....................1 1.1 Main components ............................1 1.2 Specification ..............................2 2. Operation ................................. 3 2.1 How the Jet Drive operates .......................... 3 2.2 Steering the boat ............................5 2.3 Mooring the Boat ............................6 2.4 Cleaning the Impeller............................ - Page 4 4.2 Locate center line of the outboard ......................24 4.3 Determining the Mounting Height of the Outboard ................... 25 4.4 Water Testing .............................. 27 5. Troubleshooting ............................29...
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Page 5: Main Components And General Information
1. Main components and General information 1.1 Main components 1.Top cowling 8.Clamp bracket 15. Engine stop button 2.Top cowling lock handle 9. Tilt & trim rod 16.Clam bolt 3.Gear shift link lever 10.Water inlet 17.Water pump adapter 4.Shift cam plate 11.Starters handle 18.Intake seat 5.Reverse gate... -
Page 6: Specification
1.2 Specification Main technical data: Items Data Items Data Type of engine Two cylinders,2-stroke Spark plug BPR7HS Displacement 496cm Recommended fuel Unleaded regular gasoline Bore X stroke 72mm×61mm Mixing ratio 50:1 Overall length 913mm Fuel tank capacity Overall width 420mm Recommended engine oil 2-stroke engine oil Overall height... -
Page 7: Operation
2. Operation 2.1 How the Jet Drive operates A jet driven outboard motor has substantially different handling characteristics compared to a propeller driven outboard motor. It is recommended that the operator adjusts to these characteristics by experimenting in open water at both high and low speeds. The driveshaft driven impeller draws water up through the water intake and then redirects it at a high pressure through the water outlet nozzle to create forward thrust. - Page 8 When the jet drive is in neutral, the impeller continues to rotate. However, the reverse gate is positioned so that some of the forward thrust is diverted to create reverse thrust. This approximate balancing of forward and reverse thrust will minimize any boat movement. Because the impeller is always rotating and creating thrust when the engine is running, the boat may tend to move slowly forward or backward.
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Page 9: Steering The Boat
2.2 Steering the boat The jet drive is dependent on water jet thrust for steering the boat. If the water jet thrust should ever stop (water blockage, engine stops, etc.), the boat will slow to a stop. However, while slowing there will be a reduced ability to steer the boat. -
Page 10: Mooring The Boat
2.3 Mooring the Boat Be sure to tilt the jet drive out of the water when the boat is pulled onto a beach or tied to a dock in shallow water. Failure to do this may cause the water intake housing to fill with sand or debris and could prevent the outboard from cranking over for starting. -
Page 11: Cleaning The Impeller
2.4 Cleaning the Impeller WARNING： Rotating the flywheel to free a lodged impeller can accidentally start the engine, resulting in serious injury or death. Always remove the lanyard of emergency stop switch and remove all spark plugs. It is possible for debris to lodge between the impeller and jet housing wall, especially after the engine has been stopped. -
Page 12: Lubricating The Driveshaft Bearing
2.5 Lubricating the Driveshaft Bearing Before each use, lubricate the driveshaft bearing. 1. Remove lubricating oil hose from the grease fitting. 2. Pump in grease through the grease fitting, using the grease gun. 3. Reconnect the hose to the grease fitting when excess grease exits the hose. CAUTION: The lubricant recommended is a water resistant grease of the proper consistency for this application. -
Page 13: Operating In Freezing Temperatures
2.6 Operating In Freezing Temperatures If there is a chance of ice forming on the water, the jet drive should be raised out of the water and drained completely of water. If ice should form at the water level inside the outboard driveshaft housing, it will block water flow to the engine causing possible damage. -
Page 14: Pre-Starting Check List
2.7 Pre-Starting Check List • Operator knows safe navigation, boating, and operating procedures. • An approved personal flotation device of suitable size for each person aboard and readily accessible (it is the law). • A ring type life buoy or buoyant cushion designed to be thrown to a person in the water. •... -
Page 15: Operating In Salt Water Or Polluted Water
2.8 Operating In Salt Water or Polluted Water If the boat is kept moored in the water, always tilt the outboard so the water intake is completely out of water when not in use. Wash down the outboard exterior and flush out the exhaust outlet of the jet drive with fresh water after each use. -
Page 16: Maintenance
3. Maintenance 3. 1 Impeller Removal and Installation WARNING： Rotating the driveshaft may cause the engine to crank over and start. To prevent this type of accidental engine starting and possible serious injury caused from being struck by a rotating impeller, always turn the ignition key or lanyard stop switch to the “OFF”... - Page 17 3. Remove the six nuts securing the water intake housing, and remove the water intake housing. Straighten the bent tabs on the impeller nut retainer and remove the impeller nut. a - Tabs b - Impeller nut 5. Pull the impeller straight off the shaft. If the impeller is tight, use a hammer and a block of wood to rotate the impeller clockwise on the shaft until the keyway is directly above the flat on the shaft.
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Page 18: Worn/Dull Impeller
3.2 Worn/Dull Impeller The intake of gravel through the pump can round off and wear the leading edges of the impeller. Some conditions that could be experienced from a worn/dull impeller are as follows: • Noticeable performance loss, especially on acceleration •... -
Page 19: Steering Pull Adjustment
3.3 Steering Pull Adjustment The steering on some boats will have the tendency to pull towards starboard. This pulling condition can be corrected by using a pliers and bending the ends of the exhaust fins 1/16 in. (1.5mm) toward the starboard side of the outboard. -
Page 20: Impeller Clearance Adjustment
3.4 Impeller Clearance Adjustment The impeller should be adjusted so there is approximately 0.8 mm (0.031 in.) clearance between the impeller edge and liner. Operating the jet drive in waters that contain sand and gravel can cause wear to the impeller blades, and the clearance will start to exceed 0.8 mm (0.031 in.). -
Page 21: Replaceable Jet Drive Shear Key
3.5 Replaceable Jet Drive Shear Key The jet drive is equipped with a shear key to protect it in the event of a lodged impeller. The shear key can be reached by removing the water intake housing and impeller. Grease the drive shaft, shear key, and impeller bore when replaces these parts. -
Page 22: Shift Cable Adjustment
3.6 Shift Cable Adjustment WARNING： Pressurized water hitting the reverse gate may cause it to engage, causing sudden and unexpected slowing of the boat. This can cause serious injury or death from occupants being thrown within or out of the boat. - Page 23 1. Place roller at bottom of shift cam groove as shown. Correct Incorrect 2. Place the shift lever and shift cam into full forward position.
- Page 24 3. Adjust and tighten M7 nut to make sure the shift cam at the correct position. a – M7 nut 4. The reverse gate should not be able to be forced up towards neutral. Pull on the reverse gate by hand to verify.
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Page 25: Corrosion Control Anode
3.7 Corrosion Control Anode An anode helps protect the outboard against galvanic corrosion by sacrificing its metal to be slowly corroded instead of the outboard metals. An anode is located on the water intake housing. An anode requires periodic inspection, especially in salt water which will accelerate the erosion. -
Page 26: Lubricating The Driveshaft Bearing
3.8 Lubricating the Driveshaft Bearing Lubricate the driveshaft bearing before each use. Description Where to used Part No. Grease Drive shaft bearing water resistant grease Grease Gun Drive shaft bearing Special gun with the JET CAUTION: The lubricant recommended is a water resistant grease of the proper consistency for this application. If a substitute is used, be sure that it is water resistant and of the same consistency. - Page 27 3. Reconnect the vent hose onto the grease fitting after greasing. a - Grease fitting b - Vent hose CAUTION: After 30 hours of operation, pump in extra grease to purge out any moisture. Visually inspecting the purged grease at this time will give an indication of conditions inside the bearing housing.
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Page 28: Engine Installation
4. Engine installation 4.1 Transom height of the boat Outboards with jet drives will be mounted approximately 7 inches higher on the transom than propeller driven outboards. This requires outboards than have a 15 in. shaft length to be installed on boats having a 22 in. -
Page 29: Determining The Mounting Height Of The Outboard
4.3 Determining the Mounting Height of the Outboard The following outboard mounting height settings will work well for most applications, however, because of different boat/hull designs, the setting should be rechecked by test running the boat. Refer to Water Testing. CAUTION: •... - Page 30 2. Place (center) the outboard on the boat transom. Set the height of the outboard on the boat transom so that the front edge of the water intake housing is in line with the horizontal line 3. Fasten the outboard to the transom at this height. BOATS WITH A FLAT BOTTOM HULL 1.
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Page 31: Water Testing
4.4 Water Testing CHECKING FOR CAVITATION The initial outboard height setting should be close to the optimum setting for the outboard. However, because of the hull design of some boats, obstructions, or imperfections in the hull ahead of the water intake, adjustments may be required to prevent cavitation at running speeds. - Page 32 Another option to further reduce cavitation is a rough water plate. A rough water plate may be helpful in reducing cavitation when running in windy, rough water conditions where air is sucked into the water intake when jumping waves. Install a 0.8 mm (1/32 in.) metal plate that extends from the hull bottom to the top of the water intake housing.
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Page 33: Troubleshooting
5. Troubleshooting Trouble type Possible reason Outboard mounted too high on the transom Worn jet pump impeller or liner Incorrect jet pump impeller clearance adjustment Engine over-speed(Excessive RPM) Tilting the outboard out beyond a vertical position Cavitation of the impeller due to rough water or obstruction in the boat hull Blockage of the water intake Throttle not fully open Damaged impeller...
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