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AREA
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PROBLEM
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POSSIBLE REASON
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RECOMMENDED ACTION
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CHECK
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POWER
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A. No power is transmitted when selector is in forward position.
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Worn forward clutch facings
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Replace clutch plate.
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| Damaged forward clutch plate
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Replace clutch plate.
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| Improper dump valve operation
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Clear dump valve thoroughly and replace damaged parts.
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| Low oil pressure
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Refer to D, E, or F.
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B. No power is transmitted when selector is in reverse position.
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Worn reverse clutch facings.
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Replace clutch plate.
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| Damaged reverse clutch plate.
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Replace clutch plate.
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| Damaged planetary assembly
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Repair or replace planetary assembly
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| Low oil pressure
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Refer to D, E, or F.
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C. No power is transmitted regardless of selector position.
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lnternal mechanical failure
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Overhaul transmission
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| Driverline failure
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Check input and output of transmission
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| Low oil level
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Restore proper oil level.
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| Low oil pressure
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Refer to D, E, or F.
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| Manual selector valve not positioned properly.
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Check linkage.
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OIL PRESSURE
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D.Low oil pressure regardless of selector position.
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Low oil level
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Restore oil level.
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| Improper operation of oil gage
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Replace oil gage or, if the oil gage is slow to register, bleed the oil gage line to remove entrapped air or obstruction.
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| Improper oil viscosity
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Check the oil temperature and if found to be abnormally high, remove the transmission oil cooler and clean internally and externally. Replace the cooler if necessary.
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| Improper pump adjustment
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Shirn the pump. Refer to engine service manual.
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| Restrieted or damaged oil lines
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Check oil lines.
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E.Low oil pressure when selector is in forward position.
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Broken or worn forward piston sealrings
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Replace forward piston sealrings
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| Leaking pilot bearing oil seal
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Remove and replace pilot bearing oil seal
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| lmproper operation of dump valves
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Clean dump valves thoroughly and replace damaged parts
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| Faulty flywheel.
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Replace loose or missing oil passage plugs. Check emergency engagement bolts for tightness. Tighten loose bolts.
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| Damaged output shaft sealrings
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Replace sealrings.
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F.Low oil pressure only when selector valve is in reverse position.
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Broken or worn reverse piston sealrings
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Replace sealrings
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| Damaged driveshaft sealrings
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Replace sealrings
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DRIVE SHAFT
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G. Drive shaft rotates with selector valve in neutral after shifting from forward to neutral.
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Sticking forward clutch plate
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Replace clutch plate
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| Damaged forward clutch plate
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Replace clutch plate
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| Damaged forward piston drive pins
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Replace damaged drive pins.
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| Damaged forward piston
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Replace piston.
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| Damaged planetary assembly
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Repair or replace planetary assembly.
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| Improper dump valve operation
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Clean dump valve thoroughly and replace damaged parts.
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| Faulty drive shaft sealrings
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Replace sealrings.
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| Control linkage out of adjustment
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Check linkage adjustment
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H. Drive shaft rotates with selector valve in neutral after shifting from reverse to neutral.
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Sticking reverse clutch plate
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Replace clutch plate
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| Damaged reverse clutch plate
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Replace clutch plate
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| Damaged reverse piston drive pins
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Replace damaged drive pins.
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| Damaged reverse piston
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Replace piston.
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| Damaged planetary assembly
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Repair or replace planetary assembly.
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| Control linkage out of adjustment
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Check linkage adjustment
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CLUTCH
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I. Forward clutch slipping or slow to engage.
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Low oil pressure
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Refer to B,D or F
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| Damaged forward piston or clutch plate
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Replace piston or clutch plate.
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| lmproper dump valve operation
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Clean dump valve thoroughly and replace damaged parts.
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| Worn piston sealrings
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Replace sealrings.
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Low oil temperature
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Use recommended oil. Preheat if required.
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| Worn driveshaft sealrings
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Replace sealrings.
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| Leaking pilot bearing oil seal
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Replace oil seal.
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J. Reverse clutch slipping or slow to engage.
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Low oil pressure
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Refer to D or E.
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| Damaged reverse piston or clutch plate
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Replace piston or clutch plate.
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| Worn reverse clutch facings
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Replace clutch plate
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| Worn piston sealrings
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Replace sealrings
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| Low oil temperature
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Use recommended oil. Preheat if required.
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| Worn driveshaft, sealrings.
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Replace sealrings
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POWERPACK
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K. Powerpack lacks power and acceleration.
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Engine malfunction
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Refer to engine service manual.
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| Output shaft (propeller) restricted
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Clear away obstruction
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| Boat not properly propped
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Change transmission ratios or re-prop boat
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TRANSMISSION
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L. Transmission overheats
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High or low oil level
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Restore proper oil level
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| Aerated (foaming) oil
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Refert to M.
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| Craft overloaded
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Reduce load.
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| Engine coolant overheated
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Correct engine overheating.
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| Cooler or iines kinked or clogged
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Clean or replace cooler or line.
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| Low coolant level
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Add coolant, check for leaks
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| Oil leaking
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Correct leaks
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| Low oil pressure
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Refer to D or K.
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| Clutch slipping
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Refer to I or J.
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| Output shaft (propeller) restricted
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Clear away obstruction
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OIL
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M. Oil is aerated (foaming)
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Incorrect type oil used
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Change oil; use proper type
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| High or low oil level
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Restore proper oil level
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| Air entering suction side of oil pump
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Check oil pump bolts and gasket
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| Water in oil
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Check for source; clean system
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| Gear baffle not installed
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Rebuild reverse components, install baffle.
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N. Heavy metal debris found in oil
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Transmission internal failure
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Completely disassemble, clean, and repair transmission. Replace filters and transmission oil cooler. Clean all external lines.
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O. Coolant is found in oil
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Cooler leaking
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Completely disassemble and thoroughly clean transmission. Replace both foward and reverse clutch plates. Repair or replace cooler. Replace filters. Clean all external lines
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