Parsun T25BM JET Owner'S Manual Download Page 32

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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. This plate tends to reduce air intake as well as reduce spray.

a - Rough water plate

Summary of Contents for T25BM JET

Page 1: ...OUTBOARD MOTORS OWNER S MANUAL T25BM JET T30BM JET...

Page 2: ...and expelled Increase speed slightly to regain steering The jet drive is highly maneuverable at higher speeds more so than propeller driven outboard motors Use caution when turning to prevent spin ou...

Page 3: ...zing Temperatures 9 2 7 Pre Starting Check List 10 2 8 Operating In Salt Water or Polluted Water 11 2 9 Operating In Shallow Water 11 3 Maintenance 12 3 1 Impeller Removal and Installation 12 3 2 Worn...

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...

Page 5: ...ngine 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: ...all length 913mm Fuel tank capacity 24L Overall width 420mm Recommended engine oil 2 stroke engine oil Overall height 1025mm Recommended transom height 381mm Trim stages 4 Weight 63Kg Gear reduction r...

Page 7: ...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 throug...

Page 8: ...aving hair clothing or loose objects drawn into the water intake and wrapping around the impeller shaft Stay away from the water intake and never insert an object into the water intake or water outlet...

Page 9: ...ty damage personal injury or death Boat directional control can also be substantially reduced or lost altogether by a sudden loss of power such as running out of gas quickly backing off the throttle t...

Page 10: ...inlet or outlet of the jet drive regardless of whether the boat is in the water Secure tools and loose items to avoid being struck by projectiles as a result of contact with the rotating impeller and...

Page 11: ...specially after the engine has been stopped This will lock the driveshaft and will prevent the engine from being able to crank over for starting Following are steps for dislodging the impeller 1 Posit...

Page 12: ...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...

Page 13: ...n 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...

Page 14: ...the boat drain plug is installed Arrange passengers and load in the boat so the weight is distributed evenly and everyone is seated in a proper seat Tell someone where you are going and when you expec...

Page 15: ...close to the bottom It is better to stop the engine and drift up to shore when landing and to shove off with an oar when leaving The engine can idle through areas of water less than 61 cm 2 ft deep b...

Page 16: ...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 position and remove the spark plug leads from the sp...

Page 17: ...impeller nut retainer and remove the impeller nut b a 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...

Page 18: ...ble performance loss especially on acceleration Difficulty getting the boat on plane An increase in engine RPM at wide open throttle CAUTION Do not sharpen or alter the top side lifting angle Check th...

Page 19: ...ering 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 starboa...

Page 20: ...exceed 0 8 mm 0 031 in As the blades wear shims located in the stack outside of the impeller can be transferred behind the impeller This will move the impeller further down into the tapered liner to r...

Page 21: ...ith 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 r...

Page 22: ...e reverse gate preventing it from interfering with water flow CHECKING SHIFT LINK ROD ADJUSTMENT Check the shift link rod adjustment in forward shift position The correct adjustment will position the...

Page 23: ...19 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 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 veri...

Page 25: ...An anode is located on the water intake housing An anode requires periodic inspection especially in salt water which will accelerate the erosion To maintain this corrosion protection always replace th...

Page 26: ...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...

Page 27: ...lly inspecting the purged grease at this time will give an indication of conditions inside the bearing housing A gradual increase in moisture content indicates seal wear If the grease begins to turn d...

Page 28: ...lled on boats having a 22 in transom height If the boat transom is of insufficient height and the outboard cannot be installed to the recommended height contact the boat manufacturer for recommended p...

Page 29: ...water intake to suck in air and cause cavitation Cavitation causes the engine to overspeed in spurts and reduce thrust This condition should be avoided by proper height setting Installing the outboard...

Page 30: ...n line with the horizontal line 3 Fasten the outboard to the transom at this height BOATS WITH A FLAT BOTTOM HULL 1 Place center the outboard on the boat transom Set the height of the outboard on the...

Page 31: ...the outboard out beyond a vertical position reduces the scoop angle and can cause impeller slippage and cavitation WARNING If the angle of the boat transom does not allow the driveshaft housing to be...

Page 32: ...ing 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 t...

Page 33: ...ance adjustment 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 Engine performance loss T...