Checking The Timing Belt; Replacing The Timing Belt - Yamaha F50D Servise Manual

MNT
a
Water temperature
below
60 °C (140 °F)
above
70 °C (158 °F)
5. Install a new gasket 4, thermostat 3,
thermostat cover 2, and cover 1.

Checking the timing belt

Do not turn the
counterclockwise, otherwise the water
pump impeller may be damaged.
1. Remove the flywheel magnet cover.
2. While turning the flywheel magnet clock-
wise, check the interior a and the exte-
rior b of the timing belt. Replace the
timing belt if cracked, damaged, or worn.
b
10-21
Maintenance
Valve opening a
0 mm (0 in)
more than
3.0 mm (0.12 in)
flywheel magnet
a

Replacing the timing belt

9
Do not turn the flywheel magnet coun-
terclockwise, otherwise the water pump
impeller may be damaged.
9 Do not turn the flywheel magnet or the
driven sprockets when the timing belt is
not installed. Otherwise the pistons and
valves will collide with each other and
be damaged.
9 Do not twist, turn inside out, or bend the
timing belt beyond the maximum limit of
25.0 mm (1.0 in) otherwise it can be
damaged.
9 Do not get oil or grease on the timing
belt.
1. Remove the flywheel magnet, stator
assembly, and base assembly. See
"Removing the flywheel magnet" (7-5).
2. Remove the blowby hose bolts 1 and
tensioner 2, then the timing belt 3 from
the driven sprocket side.
2
3
3. Check that the "1" mark a on the driven
sprocket is aligned with the "▲" mark b
on the cylinder head, and that the "●"
mark c on the drive sprocket is aligned
with the "▲" mark d on the crankcase.
1