3
Oil Change Intervals: Change the oil after the first two (2) hours of operation and every 25 hours thereafter
(OHH & OHSK50-130, OHV13.5-17 every 50 hours), or more often if operated under dusty or dirty conditions.
If the engine is run less than 25 hours per year, change the oil at least once per year.
NOTE: The oil filter (if equipped) requires changing every 100 hours or more often if operated under dusty or
dirty conditions.
Oil Check: Check the oil each time the equipment is used or every five (5) hours of operation. Position the
equipment so the engine is level when checking the oil.
CAUTION: Remove the spark plug wire before doing any service work on the engine.
Oil Change Procedure: Locate the oil drain plug. On some units this plug is located below the deck
through the bottom of the mounting flange. Other units drain at the base of the engine above the deck or
frame. On some rotary mower applications, where access to the drain plug is restricted by the equipment, it
may be necessary to drain the oil by tipping the mower in a position that would allow the oil to drain out of the
fill tube.
On units that the drain plug is accessible, remove the plug and allow the oil to drain into a proper receptacle.
Always make sure that drain oil is disposed of properly. Contact your local governing authorities to find
a waste oil disposal site.
Once the oil is drained, reinstall the drain plug and fill the engine with new oil to the proper capacity.
TUNE-UP PROCEDURE:
NOTE: Today's fuels can cause many problems in an engines performance due to the fuels quality and short
shelf life. Always check fuel as a primary cause of poor engine performance.
The following is a minor tune-up procedure. When this procedure is completed, the engine should operate
governor springs or linkage. Make the proper governor adjustments and carburetor presets where
required.
5. When replacing the spark plug, consult the proper parts breakdown for the spark plug to be used
in the engine being serviced. Set the proper spark plug gap (.030") (.762 mm) and install the spark
plug in the engine. Tighten the spark plug to 21 foot pounds (28 Nm) of torque. If a torque wrench
isnt available, screw the spark plug in as far as possible by hand, and use a spark plug wrench
to turn the spark plug 1/8 to 1/4 turn further if using the old spark plug, or 1/2 turn further if using
a new spark plug.
6. Make sure all ignition wires are free of abrasions or breaks and are properly routed so they will not rub
on the flywheel.
7. Properly reinstall the blower housing, gas tank, fuel line, and air cleaner assembly if removed.
8. Make sure all remote cables are properly adjusted for proper operation. See Chapter 4 under "Speed
Controls and Linkage".
9. Reinstall the spark plug wire, add fuel and oil as necessary, start the engine.
properly. Further repairs may be necessary if the
engine's performance remains poor.
CAUTION: Remove the spark plug wire
before doing any service work on the engine.
1. Service or replace the air cleaner. See
Chapter 2 under "Service".
2. Inspect the level and condition of the oil and
change or add oil as required.
3. Remove the blower housing and clean all dirt,
grass or debris from the intake screen, head,
cylinder cooling fins, carburetor, governor
levers and linkage.
4. Make sure the fuel tank, fuel filter and fuel
line are clean. Replace any worn or damaged
4
OHV
STANDARD
PLUG
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