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Figure 3-6. Cleaning Cylinder Head And
Combustion Chamber.
1 . Remove the cylinder head baffle and cylinder
head.
2. Clean away combustion deposits using a
wooden or plastic scraper.
3. Reinstall the cylinder head using a new gasket.
Torque the cylinder head fasteners in se-
quence to the values specified in Figure 3-7.
CHECK VALVE-TO-TAPPET CLEARANCE
Every 500 operating hours, remove breather/valve
cover and check valve-to-tappet clearance with a
flat feeler gauge. Refer to Figure 3-8. The engine
must be cold when checking this clearance.
1 . Remove the air cleaner assembly, carburetor,
and breather assembly. (Refer to appropriate
"Disassembly" section.)
2. Position the crankshaft so the piston is at top
of compression stroke (cam has no effect on
tappets).
Figure 3-8. Measuring Valve-To-Tappet
Clearance.
~1
K161, K181 •
15-20 ft. lbs.
0)2
7©8Q)14(Q)
Q)
K241,
©
3
K301, K321
25-30 ft. lbs.
9
©
Q5
~6
K341
Q)
25-30 ft. lbs.
3
g5 g2
* Includes K141
Figure 3-7. Cylinder Head Fastener
Tightening Sequence.
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