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181-630-14 Four-Cycle Engine • L-Head • Horizontal Crankshaft • Air-Cooled Page 13
B. Removing Debris from Engine
Before each use, remove grass clippings, dirt and debris
from the following areas:
• Levers and Linkage
• Cooling Fins
• Air Intake Screen
• Guards
Removing debris will insure adequate cooling, correct
engine speed and reduce the risk of fire. See Figure 30.
C. 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 in. (0.76 mm) if necessary. See Figure 31.
5. Install spark plug and tighten securely.
NOTE
A resistor spark plug must be used for replacement. Contact
your Authorized TecumsehPower Servicing Dealer for a
genuine replacement Resistor Spark Plug.
D. 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 cleaned or replaced. To do
this, you first need to determine the type of air cleaner on
your engine. Your engine will be equipped with one of the
following air cleaners; Type A or B. Follow instructions for
the air cleaner type that resembles your model. See
Figures 32 and 33 on page 14. Afterward, continue reading
instructions below.
NOTE
Contact your Authorized TecumsehPower Servicing Dealer
for a genuine replacement Air Cleaner.
I. Servicing Foam Filters
Clean foam pre-filter every 3 months or every 25 operating
hours. Clean daily if used in extremely dusty conditions.
After removing the pre-filter, follow these cleaning
instructions below:
1. Wash in warm water and detergent solution then press
(DO NOT twist) until all dirt is removed.
2. Rinse thoroughly until water is clear.
3. Wrap in a clean cloth and press (DO NOT twist) until
completely dry.
NOTE
DO NOT oil foam pre-filter.
4. Replace foam pre-filter onto paper filter.
II. 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 TecumsehPower Servicing
Dealer. Follow the instructions next to the drawing of your
air cleaner to remove and replace it.
NOTE
DO NOT put oil on or clean a paper filter.
Figure 30. Debris Removal Areas
Figure 31. Resistor Spark Plug
1. Levers and Linkage
2. Air Intake Screen
3. Muffler Guard
4. Cooling Fins
5. Flywheel Guard
5
4
1
3
1
2
1. .030 in. (0.76 mm) Gap
2. Electrodes
3. Porcelain
1
2
3