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1. Remove the spark plug and carefully wipe dry the electrodes with a clean rag before
setting the plug safely aside.
2. Hold the clean rag just above the plug hole and pull the starter rope smartly a few
times to clear the excess fuel.
3. Reinstall the spark plug and open the throttle a big less than half way.
4. Slowly pull the starter rope to check that compression is back to normal.
5. Smartly pull the starter rope in the usual way until the engine starts.
6. Bring the throttle back to a steady idle.
For “hot restarts” you may not need to choke the engine. Check that the fuel line is full of
gas without any bubbles and smartly pull the starter rope. If the engine doesn’t start after a
few pulls, then manually choke the engine as above and slowly pull the starter rope until you
can feel fuel wetting your thumb or finger before removing it from the carb venturi. Slowly
pull the starter one more time to check the engine is clear, and then pull smartly until the
engine starts.
2: Breakingin the engine
To ensure long life and good performance from your engine, you MUST break it in properly.
To obtain the optimum fuel for your engine, mix 87 or 90 Octane regular pump gas with
100% Synthetic Quality oil at a ratio of 16:1 (6% oil). Another choice for oil is quality
marine outboard engine oil. Operate your engine at about 1/2 to 3/4 maximum throttle
opening during the breakin process. DO NOT run at full throttle while breaking in your
engine. Patience is very important here; the boat will run more slowly during the breakin
process and the engine’s output power will increase gradually over the first 34 tanks of fuel.
Once the engine is broken in, the power will increase substantially.
3: Carb Settings
The XP254M comes with a M39 ProMod barrel type racing carburetor as mentioned above,
and the carb has been preset at the factory. However, it may require adjustment to
compensate for different ambient conditions such as varying temperature, humidity, altitude,
etc. The carb has three adjustments the low and high speed needles and the idle screw.