Troubleshooting The Lower Unit - Yamaha F30B 2018 Service Manual

Symptom 1: PTT unit does not hold the outboard motor up.
Symptom 2
PTT fluid pressure
does not increase

Troubleshooting the lower unit

Symptom 1: Shift mechanism of the forward gear and reverse gear does not operate properly.
Symptom 2
—
—
Cause
Manual valve open
Insufficient PTT fluid
PTT fluid leakage
Clogged fluid passages
Cause
Shift cable is not adjusted
properly
Shift rod does not operate
properly
Shift mechanism malfunc-
tion (in lower unit)
Outboard motor troubleshooting
Checking steps
Check the manual valve.
Add sufficient PTT fluid.
Check for PTT fluid leakage.
Disassemble and check the PTT
unit.
Check the valves for damage.
Check the fluid passages for ob-
structions.
Checking steps
Adjust the shift cable.
Check the shift rod for wear.
Check the detent mechanism.
Check the shift rod for proper posi-
tion.
Check the dog clutch.
Check the forward gear, reverse
gear, and pinion for damage and
wear.
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See
page
9-27
10-20
10-20
9-38
9-41
9-40
9-38
9-41
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page
3-6
8-4
9-10
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8-8
8-14
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8-14