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  1. #1
    Member
    Join Date
    Apr 2019
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    Deer River, MN
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    3

    optimax 90 restrictor plate?

    i have a 2006 Optimax 90 on a Crestliner 17' Fishhawk. I am planning on having Simon motorsports do a ECU upgrade /Flash. I understand that on the 75 optimax, one has to remove the air restrictor plate which seems to be a hassle. Does the Opimax 90 have an air restrictor plate? I dont want to tear into it if I dont need to.

    Thanks,

    chris

  2. Better Lucky Than Good! Casslaw's Avatar
    Join Date
    Jun 2018
    Location
    Tampa, FL
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    6,554
    #2
    I would ask this in the Mercury forum, be sure to post all the info they ask for so they can give a good answer. They know everything!
    2006 Triton SP-185, 2006 Evinrude Etec 90, PowerTech NRS3, Garmin Echomap Plus 73CV

  3. Member
    Join Date
    Apr 2019
    Location
    Deer River, MN
    Posts
    3
    #3
    Thanks, I will repost there.

    chris

  4. Member
    Join Date
    Oct 2017
    Location
    Newman, CA
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    4,653
    #4
    Parts catalog doesn't show one for the 90, only the 75.
    SNAFU

  5. Member TritonTRXV8's Avatar
    Join Date
    Oct 2012
    Location
    Northern Ca
    Posts
    22,237
    #5
    Both the 75 and 90 optimax engines have the air restrictor in the throttle body. I believe the size is the difference. Post number 2 of this older thread has a good diagram.
    http://www.bbcboards.net/showthread.php?t=725037
    Roy
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