Yamaha F40BMHD Wartungshandbuch Seite 106

CHK
POWER UNIT
ADJ
Cylinder block
Timing pulley
IN
EX
#1
c
#2 #3
Measuring steps
(1) Turn the timing pulley to match "=1"
c
marking
marking on the cylinder block.
(2) Measure the intake valve and exhaust
valve clearance on #1 cylinder.
(3) Turn the timing pulley for 120°, and
match "=" marking on the pulley with
"=" marking on the cylinder block.
(4) Measure the intake valve and exhaust
valve clearance on #3 cylinder.
(5) Repeat the aforementioned steps to
measure the intake valve and exhaust
valve clearance on #2 cylinder.
2. Adjust:
• Valve clearance
Adjustment steps
(1) Loosen the locknut
(2) Turn the adjusting screw
until the specified valve clearance is
obtained.
(3) Tighten the locknut.
Locknut
14 Nm (1.4 m
(4) Perform the above steps for all valves
which clearance are out of specifica-
tion.
3. Recheck:
• Valve clearance
NOTE:
If any valve clearance is still out of specifi-
cation, repeat all of the valve clearance
adjustment steps until the specified clear-
ance is obtained.
3-15
on the pulley with "="
1
.
2
in or out
kgf, 10 ft lb)
• •
E