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  1. #1
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    Default 1990 Alpha One Gen 1 5.7L 350. What gearing?

    I found it odd that a 5.7L 2bbl would have the 1.50:1 outdrive w/19p prop. I thought this would have a 1.65:1 drive on it. Can anyone confirm?
    1988 Four Winns Sundowner 235, 5.7-4V 260HP OMC Cobra
    1977 Glastron V-184 Crestflite, 165HP Inline Six Mercruiser 1
    1978 Sea Ray SRV-195 Closed Bow, 165HP Inline Six Mercruiser 1, Awaiting Engine Transplant.

  2. #2
    Honorary Moderator Emeritus Don S's Avatar
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    1.5 for a 5.7. The 1.65 was for l6 engines.
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
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  3. #3
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    My friends wellcraft with 305 V8 had the 1.65:1 as well as my bayliner with 305.
    1988 Four Winns Sundowner 235, 5.7-4V 260HP OMC Cobra
    1977 Glastron V-184 Crestflite, 165HP Inline Six Mercruiser 1
    1978 Sea Ray SRV-195 Closed Bow, 165HP Inline Six Mercruiser 1, Awaiting Engine Transplant.

  4. #4
    Honorary Moderator Emeritus Don S's Avatar
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    He has a 5.7, not a 5.0. I just didn't list everything that used a 1.65. Fact still remains, the 5.7 needs the 1.50 gear ratio.
    Don S.


    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

  5. #5
    Petty Officer 2nd Class dvandsm64's Avatar
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    our 1997 5.7 liter has the 1;62;1. i thought this gearing was for heavier boats with 5.7 liter.? maybe ours has been changed, just curious.



    Quote Originally Posted by Don S View Post
    He has a 5.7, not a 5.0. I just didn't list everything that used a 1.65. Fact still remains, the 5.7 needs the 1.50 gear ratio.

  6. #6
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    Gearing is hard for me to understand.

    My friends wellcraft eclipse 233 has a 5.0L 305 engine with a 1.65:1 drive. Has a 15P prop and WOT is 4400RPM

    The wellcraft eclipse 233 that has the 5.7L 350 engine has a 1.50:1 drive & 19P prop and WOT is unknown. I want to take a prop or a drive with me to test drive. I can be certain a 1.50 with a 19P prop is VERY much overpropped. I did not want to ask in the prop forum until I found out the correct drive ratio.
    1988 Four Winns Sundowner 235, 5.7-4V 260HP OMC Cobra
    1977 Glastron V-184 Crestflite, 165HP Inline Six Mercruiser 1
    1978 Sea Ray SRV-195 Closed Bow, 165HP Inline Six Mercruiser 1, Awaiting Engine Transplant.

  7. #7
    Moderator Bondo's Avatar
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    Default Re: 1990 Alpha One Gen 1 5.7L 350. What gearing?

    My friends wellcraft eclipse 233 has a 5.0L 305 engine with a 1.65:1 drive. Has a 15P prop and WOT is 4400RPM
    Ayuh,... That don't sound right to Me...
    Unless that's 1 HUGE 23'er....
    The wellcraft eclipse 233 that has the 5.7L 350 engine has a 1.50:1 drive & 19P prop
    This is what I would Expect to find....
    Any Grease is Better,..... Than No Grease at All.......

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