Yamaha F225F, Service Manual

Page: 553 / 576

10-14
General periodic maintenance
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Checking the PTT operation
1. Fully tilt the outboard motor up and down
a few times and check that the outboard
motor tilts up and down smoothly. Check
the PTT fluid level if the tilt operation is
not smooth.
2. Check the PTT unit for fluid leakage.
Checking the spark plug
1. Check the spark plugs. See “Checking
the spark plug” (7-48).
Checking the timing belt
1. Check the timing belt. See “Checking the
timing belt” (7-39).
Replacing the timing belt
1. Replace the timing belt. See “Timing belt”
(7-37).
Checking the thermostat
1. Check the thermostat. See “Checking the
thermostat” (7-72).
Checking the top cowling
1. Check the fitting by pushing the top cowl-
ing. Adjust if there is free play.
2. Loosen the nut
a
.
3. Move the stopper
b
up or down slightly
to adjust its position.
TIP:
• To loosen the fitting, move the stopper
b
in
direction
a
.
• To tighten the fitting, move the stopper
b
in
direction
b
.
4. Tighten the nut
a
.
5. Recheck the fitting. Replace the rubber
seal of the bottom cowling if the free play
cannot be adjusted.
Checking the valve clearance
1. Check the valve clearance. See “Check-
ing the valve clearance” (7-2).
Checking the water pump
1. Check the water pump housing and
impeller. See “Checking the water pump
and shift rod” (8-12).
a
b
a
b