Boss 36 BHP PISTON Service And Maintenance User Manual page 22

XV. Rotate the rings so that the gaps of the three rings are 120° apart. See Fig. 1. Lightly lubricate the
inside of the cylinder. Rotate the crankshaft so that a piston is at the top of the stroke. Compress
the rings with a ring compressor, and slide the cylinder over the piston. Repeat for the other piston.
XVI. Slide the cylinder down until it mates with the crankcase. Start all cylinder mounting bolts, until they
are snug. Torque the bolts to 180 in-lbs in the sequence shown. Do not torque to the full 180 in-lbs
all at once, but in 25-50 in-lb increments. See Fig. 2.
FIGURE 2. CYLINDER MOUNTING BOLT TORQUE SEQUENCE
XVII. Position the gaskets and valve plate on top of the cylinder. Position the head on the cylinder and
turn bolts finger tight. Torque the studs/nuts to 240 in-lbs in 25-50 pound increments. See Fig. 3.
Maintenance
Do not lubricate the rings. Use a light lubricant, such as WD-40 only, on the
cylinder walls. Oiling the rings will prevent them from seating and cause
excessive oil consumption.
FIGURE 1. PISTON RING ORIENTATION
180 IN-LBS
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