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  1. #1
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    OMC looper 225 vs 250 What's the difference

    Hi.
    Just retired the old 235 (got water in one cylinder) and purchased a overhauled 1997 Johnson 225 Venom for my old Concord. I know there was a 250 hp version on the same 3.0 litre block. Anybody know what the difference is between 225 and 250 versions? Would like to upgrade if this is not too expensive.
    Hal

    "Ton o' metalflake" 1982 Concord Mach II with 1997 Johnson 225 Venom

  2. #2
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    A 225 venom is pushing close to 250 already.

  3. #3
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    May 2001
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    The Villages, Florida
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    Larger exhaust port and smaller idle relief opening.

  4. #4
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    Thanks guys:-) Is the "idle relief opening" the same as "compression relief opening"? Sounds like a little handiwork would do the trick w/o buying any parts. I suppose i would need to re-jet the carbs too? Btw, I have heard about removal of the airbox on these motors, but not how much power it will make. Is it worth it? Will put the motor on tomorrow. Waiting for a 26" Raker II prop from e-bay and hoping for 70mph with the stock motor.
    Hal

    "Ton o' metalflake" 1982 Concord Mach II with 1997 Johnson 225 Venom

  5. #5
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    Yes its the same. If you plug it you will need to rejet. I would leave the airbox alone.

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