ENGINE
Page G-9
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notes, Cautions and Warnings.
B
B
Fig. 19 Overhead Valve Adjustment
Fig. 20 Valve Cover Tightening Sequence
At yearly intervals, the timing belt tension should be
adjusted. To do this, remove the rubber plug in the tim-
ing cover to provide access to the idler pulley adjusting
bolt (Ref. Fig. 21 on Page G-10). Loosen the tensioning
bolt (1/4 - 1/2 turn). Rotate the engine one full turn which
will allow the spring to apply tension to the belt. Tighten
the idler adjusting nut to 10 - 13 ft. lbs (14 - 18 Nm)
torque. Spray the rubber plug with a vinyl protective
spray in order to ease the installation of the plug.
For information relating to the replacement of the timing
belt, refer to 4 Cycle Engine Shop Rebuild and Service
Parts Manual (P/N 27615-G01).
Screw type
adjuster
Cam lobe up
Cam lobe down
Valve return spring
VALVE OPEN
VALVE CLOSED
.004 (.10 mm)
Valve clearance
measured here
with the engine
cold
Hold screwdriver
Lock by
turning wrench
Adjust with screwdriver
Release by
turning wrench
ADJUST
LOCK
1
2
3
4
1
5
3
4
2
6