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MAINTENANCE
86343970 18HP LIGHTNING BURNISHER
3-4
PROBLEM CAUSE SOLUTION
Surging idle Carburetor out of adjustment
Adjust idle screw (1/4” dia bright steel,
Phillips head) located on the lower left
side of carburetor (Viewed from operators
position). Rotate clockwise to increase
idle speed. IF IT DOES NOT, call our
customer service department for
assistance.
Pad is off center
Remove and reinstall
Pad driver is cracked
Replace at with new pad driver
Excessive Vibration
Bearings in front end are worn
Bearings in Front End Assembly are
worn. Place machine on its side where
the muffler is mounted. Grip Pad Driver
and move up, down and from side to side
to check for slack in the bearings. If this is
the case, then to affect a proper repair,
the bearings should be replaced and
possibly the shaft.
Engine starts and idles, but
will quit as the throttle is
advanced
Faulty service valve
To check for this, close the valve
completely and then reopen very slowly
while you listen for a "click" when the gas
begins to travel through the valve. If you
hear this very slight noise, the valve is
only partially opening. This allows enough
gas through to start and idle the engine,
but not enough for full throttle operation.
As the throttle is increased, allowing more
air to enter the intake, the engine will quit
from fuel starvation. Call your dealer or
the factory for instructions on where to
have the service valve replaced.
Meanwhile, to get by, you can continue to
open the service valve until you don't hear
a “click" and then the engine will run
normally. IF IT DOES NOT, call our
customer service department for further
assistance.
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