Fnr gearbox??

Discussion in 'Inboards' started by neonguy07, Apr 2, 2019.

  1. neonguy07
    Joined: Apr 2015
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    Location: peoria il

    neonguy07 Junior Member

    Hello all, I've been using this forum for years on ideas for a boat build(finally have time and space to start it)I've searched the forums for this issue of mine to no avail..im looking to do a wood dayboat classic 50's style but havi g dilemma with powertrain..i have looked at outboard,stern drives.but really want an inboard setup just for ease of maintenance and the fact I'm wanting to use a industrial diesel horizontal shaft engine($$$cheap) maintence.question is I'm looking at 10hp maybe 15.but am unable to find a fnr gearbox for such application.i know comet has a go kart trans but longevity is a ?? I have no answer for.already figured the 2:1 reduction and yes noise issue has been addressed.this is not a powerboat but merely a cruise somewhat fuel efficient design I'm working on.if nothing else I seen ways to hide an outboard keeping the clean stern look.and also have found 3 mercruiser 165 stern drives at local junkyard...but would love not to have that extra weight of a anchor but reliable straight 6..any help:)
     
  2. neonguy07
    Joined: Apr 2015
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    Location: peoria il

    neonguy07 Junior Member

    What I'm going for Screenshot_20190327-204841.png
     
  3. philSweet
    Joined: May 2008
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    philSweet Senior Member

  4. goodwilltoall
    Joined: Jul 2010
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    Location: nation of Ohio

    goodwilltoall Senior Member

    If i remember, zf6 is around $1200.00 but you have to go i think zf25 min if you want something reliable or medium duty (takes you up to $1,700.00 range).
    Persons with that type of tranny had them blow up even motoring maybe 3hrs. They are strictly for pleasure use and manufacturer will not replace
     
  5. neonguy07
    Joined: Apr 2015
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    Location: peoria il

    neonguy07 Junior Member

    Hm those are what I need but man 1700 for something that might break fast haha.although they say pleasure use only under 1500 hrs a year and use at partial throttle majority of time which will be my case..maybe I can find used somewhere...
     
  6. goodwilltoall
    Joined: Jul 2010
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    goodwilltoall Senior Member

    I actually think it was the zf25 that needed to be upgraded to the zf60. I think twindisc is a better make for the same application and about same prices. I ll find the model no.
     

  7. goodwilltoall
    Joined: Jul 2010
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    Location: nation of Ohio

    goodwilltoall Senior Member

    It was zf6 or zf10 which might work work well if under pitched and propped but go over and it fails. They had to go to a zf15 as they were about 30hp, right under manufacturers recommendation.

    Twinsisc makes tmc40 for upto 35hp $1,200.00, tmc60 upto 68hp $1,700.00. You most likely will be ok with either manufacturer as your max hp is 15hp
     
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