Inspection Of Timing Belt - TOHATSU MFS25 Service Manual

Maintenance

11) Inspection of Timing Belt

1. Remove upper starter lock cable, and then recoil starter and
belt cover.
2. Check timing belt inner and outer surfaces for cracks,
damages and wear while rotating flywheel clockwise with
hands. Replace if necessary.
3. Rotate flywheel clockwise to bring "
shaft pulley to " " mark b of cylinder head.
No.1 piston is to be at top dead center of
compression stroke.
4. Remove belt tensioner cap and loosen bolt by using tool until
it can be turned with hand.
5. Turn flywheel approximately 25 degrees counterclockwise to
move belt tensioner back until cam shaft pulley shifts one
tooth ( approximately 11 degrees ). ( Belt gets soft at port
side.)
6. Tighten belt tensioner bolt to specified torque.
Belt Tensioner Bolt :
27 N·m ( 20 lb·ft ) [ 2.7 kgf·m]
7. Attach cap to belt tensioner.
8. Reinstall recoil starter and belt cover.
9. Reconnect upper starter lock cable.
3-12
" mark a of cam
a
b
11°
25°
a
b
a
b
25/30 2006