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  1. #1
    Member
    Join Date
    Oct 2020
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    Arkansas
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    15

    johnson high speed orifice #2 cylinder

    I have a 1998 Johnson Venom that's new to me. I went through checking the high speed orifices and they are all stamped 74D. I ordered a 78D by mistake. Is 4 sizes bigger too much of a jump for the #2 cylinder or do I need to order a 76D? I'm reading that going up 2 sizes is common. According to the super dash on the 1998 bass cat jaguar, the motor is only showing 90h and 33 min on it. That being said, I'm not sure if that motor has a way to read hours. Thanks for your help!
    Last edited by Crappie_cat; 01-24-2023 at 10:43 PM.

  2. SC Club Moderator ChampioNman's Avatar
    Join Date
    May 2004
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    Crawfordville, FL/Lake Hartwell, SC
    Posts
    71,272
    #2
    The motor does not have the ability to provide engine hours. Yes order a 76D. #0329411 if you don't have them see if you can order 6 0344267 these are the improved float bowl drain plugs with the raised end that keeps the high speed orifices securely in place.

  3. Member
    Join Date
    Oct 2020
    Location
    Arkansas
    Posts
    15
    #3
    thanks for the help. I checked the drain plugs and they are the updated style.