2009 Yamaha F40 Outboard Service Manual, Page 91Get this manual

2009 Yamaha F40 Outboard Service Manual, Page 91

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TRBL SHTG Symptom 2
Gear pump malfunction

Symptom 1: PTT unit does not hold the outboard motor upSymptom Cause Checking step Check the manual valveAdd sufficient fluidCheck the PTT