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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 facilitate adequate cooling, correct
engine speed and reduce the risk of fire. See Figure 31.
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 elec-
trodes are:
•Pitted
• Burned
• Fouled with deposits
4. Check electrode gap with wire feeler gauge and set
gap to .030 in. (0.76mm) if necessary. See Figure 32.
5. Install spark plug and tighten securely.
NOTE
A resistor spark plug must be used for replacement. Contact
your Authorized Tecumseh Servicing Dealer for a
Tecumseh 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 Figure
33 and Figure 34.
NOTE
Contact your Authorized Tecumseh Servicing Dealer for
Tecumseh 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 Tecumseh 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 31. Debris Removal Areas
Figure 32. 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