Servicing the Spark Plug
Service Interval:
Every 100 hours/Every 6 months
(whichever comes first)
Every 300 hours/Yearly (whichever comes first)
Use an NGK BPR6ES spark plug or equivalent.
1.
Shut off the engine and wait for all moving parts
to stop; refer to
Shutting Off the Engine (page
.
2.
Clean around the spark plug.
3.
Remove the spark plug from the cylinder head.
Important:
Replace a cracked, fouled, or
dirty spark plug. Do not sand blast, scrape,
or clean the electrodes because engine
damage could result from grit entering the
cylinder.
4.
Set the gap on the plug to 0.7 to 0.8 mm (0.028
to 0.031 inch)
g000533
Figure 38
1.
Center-electrode insulator
3.
Air gap
2.
Side electrode
5.
Carefully install the spark plug by hand (to avoid
cross threading) until it is hand tight.
6.
Tighten the spark plug an additional 1/2 turn if
it is new; otherwise, tighten it an additional 1/8
to 1/4 turn.
Important:
A loose spark plug can become
very hot and can damage the engine;
overtightening a spark plug may damage the
threads in the cylinder head.
7.
Connect the wire to the spark plug.
Fuel System
Maintenance
Cleaning the Fuel-Tank
Screen
Service Interval:
After the first 20 hours
Every 100 hours/Monthly (whichever comes
first)
1.
Unscrew and remove the fuel-tank cap (
) from the fuel tank.
g265976
Figure 39
1.
Fuel-tank cap
2.
Remove the fuel-tank screen from inside the
fuel tank.
3.
Use clean fuel to clean the screen and install
it in the tank.
4.
Install the fuel-tank cap to the fuel tank.
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