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  1. #1
    Boilerman Bill BPnta's Avatar
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    Dangers of bad fuel ratios on 4-Strokes?

    I need some advice guys.

    I know on a 2-stroke a lean mixture runs hot and melts pistons. A rich one doesn't cause any damage.

    Are these principles basically the same on a 4 stroke?


  2. #2
    Moderator beerdart's Avatar
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    Yes

  3. #3
    Moderator Snoman's Avatar
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    Quote Originally Posted by beerdart View Post
    Yes

    What he said.....

  4. #4
    Boilerman Bill BPnta's Avatar
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    Got it. Thanks!

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    Moderator RX951's Avatar
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    ditto on dat

  6. #6

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    Quote Originally Posted by bpnta View Post
    I need some advice guys.

    I know on a 2-stroke a lean mixture runs hot and melts pistons. A rich one doesn't cause any damage.

    Are these principles basically the same on a 4 stroke?
    if you run way to rich on a 4stroke the gas can wash the oil off the cylinder walls causing premature cylinder and ring wear.

    theoretically that's why new fuel injected engines last far longer then older carb engines becuase carbs have a tendency to dump more fuel into the engine at times then needed.

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