TOHATSU MFS25 Service Manual page 137

Loosen rocker arm lock nut 6, and turn adjusting screw 7
11.
to set valve clearance to specified value.
• Turning adjust screw 7 clockwise makes valve
clearance smaller.
• Turning adjust screw 7 counterclockwise
makes valve clearance larger.
Valve Clearance Driver 8 :
P/N. 3AC-99030-0
Torque Wrench 9 :
P/N. 3AC-99070-0
Thickness Gauge 0 :
Use commercially available item.
Tighten rocker arm lock nut 6 to specified torque, and check
12.
valve clearance again. Readjust if necessary.
Rocker Arm Lock Nut 5 :
7 N·m ( 5 lb·ft ) [ 0.7 kgf·m]
Perform adjustment of valve clearances when
engine is cold.
Valve Clearance (when engine is cold) :
(IN) Intake valve d : 0.15±0.02 mm ( 0.006±0.001 in )
(EX) Exhaust valve e : 0.20±0.02 mm ( 0.008±0.001 in )
13. Install cylinder head cover, fuel pump, spark plugs, recoil
starter and belt cover.
When removing or installing cylinder head cover,
use 10mm ring wrench with large offset angle.
14. Reconnect spark plug caps and ignition coils.
15. Reconnect breather hoses (2) and cooling water (fuel cooler)
hoses (2).
16. Reconnect upper starter lock cable.
25/30 2006
6
7
d
6
7
8
0
EX
NO.1 NO.1
EX
NO.2 NO.2
NO.3 NO.3
7
e
9
5
IN
IN
5-21