10
DR
®
RV340 ENGINE
Don’t touch the muffler when the engine is running to avoid burns.
3) Spark plug
Recommended Spark Plugs
Engine DR Power Plug # Torch Plug # NGK Plug #
RV340
37338 F6RTC
BPR6ES
To ensure the engine will run normally, the spark plug gap must be correct
and make sure there are no deposits around the spark plug.
1.
Remove the spark plug cap.
2.
Clear away dirt from around the spark plug base.
3.
Remove the spark plug using a spark plug wrench.
4.
Visually check the spark plug. Clean with a steel brush. If the insulator is
damaged, replace the spark plug.
5.
Measure the spark plug clearance with a feeler gage. The clearance
should be .028" ~.032" (0.7~0.8mm) If adjustment is necessary, bend
the side electrode carefully.
6.
Check if the spark plug gasket is in good conditions. Screw in the spark
plug as far as you can by hand to prevent thread damage.
7.
Tighten the spark plug with a spark plug wrench and compress the
gasket.
If a new spark plug is used, turn it 1/2 a turn after compressing the
gasket.
If reinstalling the used spark plug, turn it 1/8-1/4 a turn after
compressing the gasket.
The spark plug must be tightened securely or it may become very hot and damage the engine.
Only use recommended spark plugs. Failure to do so may damage the engine.
