Cleaning The Blower Housing - Toro 68141 Operator's Manual

Replacing the Spark Plug (continued)
2. Clean around spark plug and remove plug from cylinder head.
Note:
electrodes because engine damaged could result from grit entering the cylinder.
3. Set the air gap at 0.70 to 0.80 mm (0.028 to
0.031 inch)
by hand to avoid cross-threading.
4. After the spark plug is seated, tighten it with a
spark plug wrench to compress the sealing
washer.
5. When installing a new spark plug, tighten 1/2
turn after the spark plug seats to compress the washer.
6. When installing the original spark plug, tighten 1/8 to 1/4 turn after the spark plug seats
to compress the washer.
Note:
spark plug can damage the threads in the cylinder head.
7. Connect the spark-plug wire.

Cleaning the Blower Housing

To ensure proper cooling, ensure that the cooling fins and other external surfaces of the
engine are kept clean at all times.
Ensure that the cooling shrouds are installed.
Operating the engine with dirty or plugged cooling fins and/or cooling shrouds
removed causes engine damage due to overheating.
3451-708A
Replace a cracked, fouled, or dirty spark plug. Do not sand blast, scrape, or clean
. Install the spark plug carefully
A loose spark plug can overheat and damage the engine. Overtightening the
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IMPORTANT
Page 5–10 Maintenance: Engine Maintenance