Spark Plug; Cleaning/Replacing Air Cleaner; Servicing Paper Filters; Carburetor - Tecumseh VLV Technician's Handbook

Spark Plug

Check spark plug yearly or every 100 operating hours.
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Replace spark plug if porcelain is cracked or if
electrodes are:
• Pitted
• Burned
• Fouled with deposits
4. Check electrode gap with wire feeler gauge and set
gap to .030 (0.76mm) if necessary.
5. Install spark plug and tighten securely.
A resistor spark plug must be used for replacement
(Tecumseh part no. 33636, or Champion part no. RJ-17LM).
Electrodes
.030 (0.76mm) Gap
Resistor Spark Plug

Cleaning/Replacing Air Cleaner

Your engine has an air cleaner which helps prevent
premature engine wear and failure. NEVER run engine
without complete air cleaner installed on engine. Your
air cleaner periodically needs to be replaced.

Servicing Paper Filters

Paper filters cannot be cleaned and must be replaced
once a year or every 100 operating hours; more often if
used in extremely dusty conditions. Replacement
filters are available at a Authorized Tecumseh Servicing
Dealer. Follow the instructions next to the drawing of
your air cleaner to remove and replace it.
DO NOT put oil on or clean paper filter.
1-6
NOTE
Porcelain
NOTE
F l a n g e
Slot
Paper Filter
Air Cleaner Assembly

Carburetor

If you think your carburetor needs adjusting, see your
nearest Authorized Tecumseh Servicing Dealer. Engine
performance should not be affected at altitudes up to
7,000 feet (2,134 meters). For operation at higher
elevations, contact your Authorized Tecumseh Servicing
Dealer.

Engine Speed

To avoid serious injury NEVER
WARNING
tamper with the factory setting of
engine governor. Running the
engine faster than the speed set at the factory
can be dangerous and will viod the engine
warranty.

Engine Stopping Mechanism

Some engines are equipped with
WARNING
a federally-mandated mechanism
which stops the engine and mower blade. To
avoid serious injury or death as a result of
contact with the mower blade, do not interfere
with or bypass this mechanism. Parts of the
mechanism may be subject to wear and must be
checked once a year by an Authorized Tecumseh
Servicing Dealer. In the event the mechanism
fails for any reason, you must not use the engine
until corrected by an Authorized Tecumseh
Servicing Dealer.
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