The spark plug must be properly gapped and free of deposits for the
bes
t performance. Check local bylaws to see if a resistor spark plug is
required to suppress ignition signals. Replace the included spark plug
with a resistor spark plug if required.
This engine has two spark plugs.
1. Remove any dirt from around the spark plug area.
2. Unclip the spark plug lead and remove the spark
plug with a spark plug wrench. This will have a
rubber pad inside the socket to protect the spark
plug’s ceramic coating.
3. Inspect the spark plug. Replace it if damaged, badly fouled, the
sealing washer is in poor condition or the electrode is worn.
4. Check the gap with a spark plug gauge. If
necessary, reset the gap (See Specifications).
5. Correct the gap by carefully bending the side
electrode. Check the gap after each adjustment.
6. Install the spark plug by hand, to avoid cross
threading, until the gasket is compressed. Tighten
an additional 1/2 to 1/3 turn more with a spark plug
wrench or to the recommended torque if listed in the
Specifications.
7. Reconnect the spark plug lead to the spark plug.
8. Repeat for other spark plug.
ADJUSTING THE ENGINE IDLE SETTING
NOTICE! The engine speed is set by the factory. Increasing
t
he speed too much can damage the engine. Too low a
speed will reduce the engine’s efficiency. Have a qualified
technician adjust the engine speed if necessary.
1. Start the engine and wait for it to idle.
2. The idle screw is above the fuel sediment cup. Tighten the screw
to increase the engine speed. Loosen to reduce speed. See
Specifications for the standard idle speed range.
3. Shut the engine off and allow to cool.
Figure
6.
Figure
7.
8996977 V-TWIN GAS ENGINE V1.1
Assistance available at www.princessauto.com or 1-800-665-8685 Page 20
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