Engine System
30
Service Manual – PBU Propane Floor Burnisher
Ignition/Electrical System
Starter
The starter consists of a 12-volt motor which drives a pinion
gear to engage the flywheel of the engine to turn the engine. The
pinion gear is mounted to a bendix drive, which is a spiral gear
When the motor first turns, inertia keeps the pinion gear from
rotating, but this causes the pinion gear to climb up the spiral
bendix When the pinion gear is at the top of the bendix, it is
aligned with the engine’s flywheel, and engages with it to turn the
engine As soon as the engine begins to turn on its own, which is
faster than the starter motor, the pinion gear is spun backward,
which causes it to climb down the bendix spiral, and move away
from the flywheel.
If the starter motor spins but doesn’t engage with the engine, it is
typically the bendix drive or pinion gear that are damaged
1 To avoid accidental shorting of the starter wire, remove the
battery-negative terminal from the battery
2 Remove the two bolts that secure the starter
to the engine housing, and lower the starter to
remove it
3 Remove the nut that secures the power wire to
the motor terminal, and remove the wire
4 Inspect the pinion gear for chipped or damaged
teeth If damaged, replace the starter
5 Inspect the bendix drive for smooth operation
Apply a small amount of grease to the bendix
spiral and move the pinion gear up and down to
spread it
6 During replacement, don’t forget to install the
engine lifting hook on the back mounting bolt,
and the ground wire to the front mounting bolt
Pinion
Gear
Bendix
Bendix
Spring
Battery
Negative
Lifting
Hook
Mounting
Bolts
Ground
Wire
Positive
Wire
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New & Reconditioned Equipment - www.southeasternequipment.net
