8-2
8. Install the oil pump shaft into the flange cover from
the bottom up. The long end of the shaft inserts into
the cover. (Illust. 8-4)
10. Use seal protector 670330 to install the mounting
flange with the governor gear assembly installed to
the crankcase. Use the dowel pins to position the
flange and new gasket. Slightly rotate the crankshaft
to allow the governor gear to mesh. Do not force.
Apply a drop of blue Loctite 242 to the cover screw
threads and torque to 250 in. lbs. (28 Nm).
11. Apply a small amount of engine oil and install the oil
pump rotor. Install a new “O” ring and the pump cover.
Tighten the screws to 60 inch pounds (6.8 Nm)
torque.
12. Install the breather reed with the notched corner
facing the cylinder head. Install the limiter plate,
breather cover and a new gasket. The breather cover
must have the outer lip facing out.
13. Rotate the crankshaft to place the piston in the #1
cylinder at Top Dead Center (TDC) on the
compression stroke. (Cylinder nearest mounting
flange).
14. Pre-assemble the valve and spring assemblies on
the cylinder heads. Place the springs (dampening
coils toward the head) over the valve guides. Install
the valve caps on the springs with the larger opening
away from the springs. Use spring compressor tool
part 670315A to compress the spring and cap and
install the retainers.
15. Install the cylinder head using a new head gasket.
Torque the head bolts in 60 in. lbs. (6.7 Nm)
increments following the numbered sequence. (Illust.
8-6) Cylinder head bolt torque specification 230 in.
lbs. (26 Nm).
9. Slide on the oil pump gear so as the raised center
portion is on top. (Illust. 8-5) Fasten the gear down
with the retaining ring.
8-4
8-5
8-6
1
2
3
4
5
6
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