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GB - 13
ENGINE
See Figure 4. For further information on the engines,
refer to the enclosed Engine Manual.
Cooling
Engine is air cooled. Air must circulate freely around
engine from Air Intake to cooling fins on cylinder head
and block, to prevent overheating.
Every 100 hours of operation or yearly (more often if
conditions require) remove cooling shrouds and clean
cooling fins. Clean external surfaces of engine of dust,
dirt and oil deposits which can contribute to improper
cooling.
IMPORTANT: DO NOT operate engine with blower
housing removed or engine overheating damage will
result.
Engine Oil
See engine manufacturer’s instructions for proper type,
viscosity and amount required.
Engine Oil Check
The engine crankcase oil should be checked daily or
every five (5) hours of operation. Oil level MUST be
maintained in safe operating range on dipstick at all
times or engine damage will result.
To Check:
1. Clean all debris away from around oil cap.
2. Remove oil cap and dipstick. Wipe oil off dipstick
with a clean cloth.
3. Replace dipstick until cap bottoms on tube.
Remove dipstick again and observe oil level. Oil
should be at the Full (F) mark.
4. If low, add oil and bring up to the Full (F) mark.
DO NOT over fill. Oil level must not exceed Full
(F) mark.
5. Replace dipstick and cap.
6. Clean up any spilled oil.
IMPORTANT: DO NOT overfill. Be sure engine is level
when adding oil.
Changing Oil
IMPORTANT: Change engine crankcase oil after first
two (2) hours of operation. Thereafter, change oil every
twenty five hours of operation (more often in dusty dirty
conditions).
NOTE: Run engine just prior to changing oil. Oil will
flow more freely and carry away more contamination
when warm.
1. Drain engine crankcase by removing oil drain
plug. After oil has drained, replace plug.
2. Remove oil fill cap and dipstick.
3. Pouring slowly, fill crankcase with oil. (See
specifications).
4. Check oil level with dipstick. Replace dipstick and
retighten cap.
Air Cleaner
IMPORTANT: Never run engine without complete air
cleaner installed on engine.
Inspect filter every twenty-five (25) operating hours
(more often if unit is used under extremely dirty or
dusty conditions).
Foam Filter
Clean and reoil every three (3) months or every
25 operating hours. Clean and reoil daily if used in
extremely dusty conditions.
1. Wash in water and detergent solution and
squeeze (don’t twist) until all dirt is removed.
2. Rinse thoroughly in clear water.
3. Wrap in a clean cloth and squeeze (do not twist)
until completely dry.
CAUTION: Periodically clean muffler and
manifold areas to remove all grass, dirt and
combustible debris. If engine muffler is
equipped with spark arrester screen
assembly, remove every 50 hours for cleaning
and inspection. Replace if damaged.
1. Oil Fill Cap and
Dipstick
2. Air Cleaner Cover
3. Spark Plug
4. Oil Drain Plug
5. Fuel Tank
6. Fuel Cap
Figure 4
2
1
6
3
4
5
1. Cover
2. Filter Element
3. Paper Element
4. Body
Figure 5
1
3
2
4