last for over 5 to 10 gallons of fuel if properly cared for. Some of the main
things to note are:
- Proper air
filter that is cleaned between runs, or replaced with a fresh one.
- Good quality
air filter oil
- Hi quality
Filter element (remember if any dirt gets into the motor it will be
- Hi quality fuel
(30% race fuel usually is the best) I would suggest Werks, ODonald or
Byrons, do not use backyard basher type fuels as the quality of oil is
- Make sure when removing the
glow plug to clean the area around it perfectly so that there is no
possibility of dirt getting in (hold the motor upside down when changing
- Run out the fuel when finished
running as the fuel is hydroscopic and will cause rust by attracting
moisture inside the motor.
- Put after run oil or mineral
oil in the motor when finished running for the day.
- Always run at part throttle
during warm up and keep motor temps in control, most engines operate best
between 210F and 260F. User a good quality temp gun to check your temps.
- Make sure the bottom needle is
set rich enough that the motor loads up after idling for 10-15 seconds and
stalls after about 25. If the bottom is too lean it will be inconsistent
to drive and your temps will be all over the place.
- Every gallon or 2 of fuel or so
tear down the engine and clean it out with break cleaner. Inspect it for any
wear. Replace anything that is damaged and figure out why it may have
- While you have the engine
apart, check the bearings for any roughness. If they are rough they are
shot!!! Replace them right away, if you donít there will be metal shavings
inside the motor in no time from the bearing self destructing.
- Always put after run oil on the freshly
cleaned parts and during assembly to avoid rust.
- Make sure the crank pin and rod
bearing are not sloppy. There should be no visible play at all between
- Like anything else keep it
clean, how well you care for these things makes all the difference in the