O'Donnell SS .21 Manual - Fuel
5
FUEL
• We recommend O’Donnell 20% or 30%
racing fuel be used whenever possible. If
at any time during the life of the engine
you change fuel, either the percentage of
nitromethane or brand, we recommend
that you set the carburetor needles back to
the stock settings to help prevent possible
damage or premature engine wear.
• Whenever possible, do not allow the fuel
container to sit in direct sunlight or opened.
Always close the container promptly after
each use. Do not store on a concrete fl oor.
Doing so will decrease the quality of the
fuel and could cause the engine to perform poorly.
• We recommend that you install new fuel tubing on your vehicle
before installing the SS .21. This will help prevent problems related
to old or torn fuel tubing.
• We highly recommend a quality fuel fi lter be used between the
vehicle’s fuel tank and the SS carburetor. This will help keep out
dirt and debris that could be detrimental to the life of the engine.