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  • charlieblackwoodt47
    started a topic OMC B1

    OMC B1

    What is the best lowerunit to use for the OMC 22cc b1 350 mod

  • Rex Hall
    commented on 's reply
    You could also run a GRM 11:15 unit, at 73.33% and it is probably the stongest unit of the bunch.

  • GheenoeRacer
    replied
    Im currently building a b1 on a omc 15A

    Leave a comment:


  • Roskowski30h
    commented on 's reply
    You can run with our without a water pump in the hot rod unit, its a matter of personal preference. There is no appreciable difference in performance. I have one unit with and one without

  • bh/
    commented on 's reply
    -does the HR unit not run w/o a water pump as a Mod ?

  • OldRacerBU
    replied
    David and I have three (3) OMC B-1 engines we are selling. All three have Mercury Quicksilver lower units. One has a steel stick tower and two have aluminum towers. Two are listed on our website. http://store.aeroliner-boats.com/epa...gories/Engines

    Leave a comment:


  • Mike 41P
    replied
    I like the combo of hot rod foot with short tower and the adapter plate and shaft are all over

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  • DeanFHobart
    replied
    The numbers are... 16:21 = 76.19% and 14:19 = 73.68% .... Therefore the Hot Rod unit could run a slightly larger propeller. However the ratios are so close it is possible you might not notice a difference.

    The answer is testing, testing, testing.
    Last edited by DeanFHobart; 04-23-2019, 08:37 AM.

    Leave a comment:


  • Roskowski30h
    commented on 's reply
    I run large 750ish props on the hot rod unit

  • dwhitford
    commented on 's reply
    The 14:19 Champ unit is a slightly higher reduction than the 16:21 Merc unit, so ostensibly you can run somewhat bigger props with the Champ unit.

  • charlieblackwoodt47
    replied
    Using a hot rod foot (14/19) Does this limit the tiger props that can be run. do I have to run a smaller wheels or can I run the larger wheels like as in a 750 wheel

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  • DrRick34-0
    replied
    I only have experience with the mercury unit,,, but have been beat before by the hot rod unit. Probably whatever you can get or what access to props you have... either can work..

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  • charlieblackwoodt47
    replied
    I suppose I should’ve been more descriptive. Is there an advantage or disadvantage between the two. What’s the differences with the gears

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  • DrRick34-0
    replied
    Charlie--- Modhydro is right on target. Would love to have out there playing with us.. Rick

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  • modhydro
    replied
    Merc 16:21 or hotrod 14:19 (pretty sure on ratio....)

    This opens the door to MANY props. Most 750 mod wheels will be right in the ballpark as will 25SSH props.

    Leave a comment:

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