Service Manual

9-6
Table of Contents
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
ENGINE ASSEMBLY
Assemble Lower End
General Steps of Internal Assembly
1. Only use components that have been previously cleaned and pass inspection see chapter 8, page 8-1.
2. Lubricate components at each assembly step, using a good clean motor oil or assembly grease.
Crankshaft
1. Oil the crankshaft bearing surfaces.
2. Insert the tapered ywheel end of the crank into the crankcase.
Piston Rings onto Piston
1. Assemble the rings onto each piston in the following order (Figure 5):
-oil ring
-middle ring
-top ring
NOTE: Upper two rings are stamped near the ring gap, assemble with the stamp mark facing the piston
dome.
Figure 5
Top ring
The second ring
Oil ring
Piston
Sign
Top ring
The second ring
Oil ring
Piston pin
CLIP
CUT-OUT
Top ring
Second Ring
Oil ring
Piston