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  1. #1
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    Mercury crankshaft fitment ques.

    Will a 91 2.4 bridgeport 9 ring non oiler fit and work in a 2.5 245 block ?

  2. #2
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    i don't remember if yea/nay on this?... did/does tha BP use plastic center mains?.. most "production" 2.4's had tha metal caged mains except tha "fat block"... has ta have tha shoulder bosses on tha two center mains to keep tha bigger OD plastic 2.5 mains in tha right place.......
    Last edited by tlwjkw; 01-12-2017 at 07:00 AM.

  3. #3
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    steel caged bearings on it

  4. #4
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    then, no..... jmo.

    some say it's worked for them but everyone i've personally seen (plastic on non-shoulder) gave up sooner or later.
    Last edited by tlwjkw; 01-12-2017 at 08:02 AM.

  5. #5
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    ok,tks,I have a mystery powerhead coming to me,lol,a buddy bought it several yrs ago,and it spit something thru the front 1/2,but didn't appear to come thru the block,i really don't know what it is,was sold to him as a 260 converted to carbs,I'm guessing it is a 245 or possibly a promax. I'm just thinking ahead with the crank,as I have 2 bridgeport cranks here,in case the one coming is busted up.

  6. #6
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    gotcha..

    JAN, something ta look for: 260/225 PM block won't have bleed fittings on tha block half...... all other production, plus 150/200 PM, 245 will have 'em....

  7. #7
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    Ok tks, my buddy is slow getting me some pics or numba's, lol, i havent seen pics of it in a long time, i originally didnt want it and found him a nice 200efi for his ally fishin boat. Talking to him yest. He still has the powerhead,so,i want it, lol ,i'm prayin it's a promax, i have nic bores here in 2.4 and a 260, but i need a 40 amp fishin' motor to build.

  8. #8
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    alrighty then!...225 PM is a hard, all around motor ta beat... good luck and hope its what ya want

  9. #9
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    Quote Originally Posted by tlwjkw View Post
    alrighty then!...225 PM is a hard, all around motor ta beat... good luck and hope its what ya want
    Tks man !

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