Checking The Valve Clearance - Yamaha F225F Service Manual

Checking the valve clearance

Measure the valve clearances when the
engine is cold.
Do not turn the flywheel magnet counter-
clockwise. Otherwise, the water pump
impeller could be damaged.
1. Remove the blowby hose a.
a
2. Remove the vapor gas hoses and
canister. See "Removing the canister" (6-
26).
3. Disconnect the ignition coil couplers a,
engine ECM couplers b, and knock
sensor coupler c.
4. Remove the bracket b and speed
sensor coupler d.
5. Remove the ignition coils and spark
plugs.
b
a
b
c
6. Remove the engine ECM and engine
ECM bracket.
a
d
Power unit (check and adjustment)
7. Turn the flywheel magnet c clockwise
until the dowel hole e in the flywheel
magnet c is aligned between the VCT
assembly (STBD) d and driven sprocket
(STBD) e.
8. Check that the "II" marks f on the VCT
assembly (PORT) and driven sprocket
(PORT) are aligned, and check that the
"I" marks g on the VCT assembly
(STBD) and driven sprocket (STBD) are
aligned.
g
e
d
e
9. Remove the timing belt guide (STBD)
and cylinder head covers.
10. Measure the valve clearances h and k
according to steps 11–13.
IN EX
#2
#4
#6
PORT
0
1
2
3
f
4
5
6
c
7
8
9
EX IN
#1
10
#3
#5
STBD
A
7-2