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  1. #1

    Default 1997 OMC 115TJEUC carb rejetting issue

    Gents, I have the above engine (turbojet drive) and am rebuilding the carbs. (carb bodies 335829-ET). The issue I have is that the jets don't match what was purchased from an OEM parts supplier. Idle air orifice pulled out is #36. New one is #39.
    High speed fuel orifice pulled #67C. New jet is #68C. Carb casting indicates 8/94 manufacture. (idle fuel orifice matches with #22) Set up is dual carb, V4 90deg 115HP. Please advise. Thx!!

  2. #2
    Join Date
    Sep 2016
    Location
    Smyrna, TN
    Posts
    236

    Default Re: 1997 OMC 115TJEUC carb rejetting issue

    You can look up your own parts specs on OMC SystemMatched Lookup & look at parts schematics. They list Turbo jets parts list. After checking that the parts you quoted are correct. 68C HS, 22 LS, & 39 idle air bleed. Not much difference in the .001 HS & someone might have just wanted to richen the idle some? Idle air jets have to make a bigger move to have an effect on the running quality.


  3. #3

    Talking Re: 1997 OMC 115TJEUC carb rejetting issue

    Quote Originally Posted by t2stroke View Post
    You can look up your own parts specs on OMC SystemMatched Lookup & look at parts schematics. They list Turbo jets parts list. After checking that the parts you quoted are correct. 68C HS, 22 LS, & 39 idle air bleed. Not much difference in the .001 HS & someone might have just wanted to richen the idle some? Idle air jets have to make a bigger move to have an effect on the running quality.

    Nice! Thanks a bunch. Thanks for the "OMC SystemMatched" info as well. I will have to dig around in there.

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