TOHATSU MFS 8B Service Manual page 69

4. Pull starter rope slowly to bring "●1" mark
pulley to "▲" mark
#1 piston is to be at top dead center of
compression stroke.
5. Check and adjust #1 cylinder's intake and exhaust valve
clearances.
Valve Clearance (when engine is cold) :
(IN) intake side
(EX) exhaust side
6. Loosen rocker arm lock nut
so that valve clearances are within the specified range.
· Turning adjust screw
valve clearance smaller.
· Turning adjust screw
makes valve clearance larger.
Valve Clearance Driver
P/N. 3AC-99071-0
Torque Wrench
P/N. 3AC-99070-0
Thickness gauge :
Use commercially available item.
7. Tighten rocker arm lock nut
check valve clearance again. Readjust if necessary.
Lock Nut
7 N m (5 lb ft) [0.7 kgf m]
Valve Clearance (when engine is cold) :
(IN) intake side
(EX) exhaust side
4st 8/9.8 2016
of cam shaft
of cylinder head.
: 0.13 - 0.17mm (0.0051 - 0.0067in)
: 0.18 - 0.22mm (0.0071 - 0.0087in)
, and turn adjusting screw
clockwise makes
counterclockwise
:
:
to specified torque, and
:
: 0.13 - 0.17mm (0.0051 - 0.0067in)
: 0.18 - 0.22mm (0.0071 - 0.0087in)
3-19