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18hp ic Problems

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  • 18hp ic Problems

    I have a 18hp ic that starts great will run for 5-10 minutes. It starts loosing power and has poor acceleration until it stalls out. I checked the gas cap, I still need to check the spark, I am thinking that the valves need adjusted? The carb was clean when I put it all together and I installed a low psi electric fuel pump, so I am sure it's getting gas.
    Courage Invites Critics

  • #2
    Start it up and run it till it stalls, check for spark and check compression. Could be the magnetron getting hot and losing spark, compression could be weak when hot.
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    • #3
      I had a 2 stroke that did that and it turned out the rings were shot and the one piston was burned.
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