Superabrasive
Owner’s Manual – LAVINA® LB36G-S
5/2018
26
7. TROUBLESHOOTING
7.1 ENGINE
When troubles occur, be sure to check the simple causes which may at first seem too obvious to be considered. For example,
a starting problem could be caused by fuel starvation due to an empty propane cylinder or an unopened service valve. If you
do not check for this, starter burnout could result.
Some Troubles and solutions:
Surging idle
To smooth out the engines' idle characteristics, adjustment is provided by an idle screw on the lower left side of the
carburetor as viewed from the operator's position. The screw is bright steel and 1/4" in diameter with a Phillips head on it.
Rotating the screw clockwise will increase the idle speed and this should cure the "surging idle". If it does not, call our
customer service.
Engine starts and idles, but will quit as the throttle is advanced
It is possible that the propane tank's service valve is faulty. 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 do not hear a “click" and then the engine will run normally. If it does not, call your
customer service.
Starter barely turns the engine over or the solenoid just clicks
The battery is likely low in charge. This can be remedied by recharging the battery using a 12 Volt battery charger at 4.12
amperes. The battery is located under the frame at the rear of the buffer. The positive post is the one with the RED cable
attached to it. Follow the instructions that came with the battery charger. REMINDER: this will continue to happen unless your
engine is run for sufficient time between starts to recharge the battery.
7.2 CHECKING AND CHANGING OIL
Check the engine oil level, screw the dipstick in to get reading. While changing engine oil, check for leakage of engine oil at
the various seals. The hour meter will blink between 48-52 hours as a reminder.
Recommended Oil Change Intervals
Do not exceed the 50-hour oil change interval. Oil changes more frequent than 25 hours will give even longer engine life. In
any case, always use 30HD or 10W30 engine oil with all of the following ratings: SF, SG, and CC. make sure the oil level is
maintained at the "FULL" level.
Figure 7.2.1
Figure 7.2.2
