Specifications

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
9 AND 13 H.P.
B8. HeadBolts(4)
C8. Cylinder head cover
G6. Sparkplug
D8. HeadGasket
E8. Gasket
 F8. Dowelpins(2)
G8. Cylinder Head
H8. Valvespringretainer(2)
 I8. Valverotator(2)
J8. Push rod guide
K8. Rockerarm(2)
 L8. Valvespring(2)
M8. Rockerarmpivot(2)
N8. Rockerarmpivotnut(2)
O8. Rockerarmpivotbolt(2)
P8. Exhaust valve
Q8. Intakevalve
R8. Oil Seal
S8. Pushrods(2)
T8. Plate
U8. Shroud bolt
B8
F8
E8
G6
Before installation, remove any carbon deposits from
the combustion chamber and inspect the valve seats.
After assembly measure the cylinder compression.
Loosen and tighten
bolts in a crisscross
pattern, taking 2-3
steps.
Clean spark plug. See Spark Plug
under Maintenance.
C8
G8
D8
Do not interchange
the exhaust (P8) and
intake(Q8)valves.
H8
K8
O8
I8
N8
P8
M8
J8
R8
S8
Q8
L8
Inspectvalvespring(L8).
CAUTION: If the valve rotator (I8)
is not installed the exhaust valve (P8)
could drop into the cylinder when starting
the engine.
CAUTION: Do not remove the
valve spring (L8) while the cylinder head
is installed or the valves (P8, Q8) will drop
into the cylinder.
Check for wear on rocker arm
and push rods, replace if needed.
Remove carbon deposits
from exhaustvalves (P8) and
inspect the valve.
T8
U8