Onan NHC Series Operator's/Service Manual And Parts Catalog page 36

2. Adjusting Pinion Clearance. Connect the battery
to the starting motor as shown in Figure 49. This
•will allow the pinion of the starting motor to slide
and stop. In this state, measure the clearance
between the end of the pinion and pinion stopper
when the pinion is pushed lightly toward the
commutator end. Clearance should be .02" to
.06". Adjust for proper clearance by removing the
magnetic switch attaching screws and select
proper thickness of the fiber packings shown in
Figure 50.
B A T T E R Y
FIGURE 49. BATTERY-CONNECTIONS.
FIGURE 50. ADJUSTING PINION CLEARANCE
34