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  1. #1
    Join Date
    May 2011
    Posts
    19

    Default What rotation is my 1992 Mariah (L or R)?

    I need to order a new starter and don't have access to my boat right now. Its the PCM 351 power plus with 1:23:1 transmission. Anyone know what rotation this is off hand?

  2. #2
    Join Date
    May 2009
    Location
    syracuse Indiana
    Posts
    425

    Default

    Left hand rotation engine. Don't go by the transmission output as you have a gear reduction tranny with a sun gear. Al
    Supra Beast
    Custom 496 MPI HO 425 hp
    Custom Teak floor

  3. #3
    Join Date
    May 2006
    Location
    Nashville
    Posts
    2,127

    Default

    If all else fails look the engine when cranking it. Which way does the center pulley (crankshaft pulley) turn? Correlate that to looking at it from the back of the engine.

    If the pulley (from the back) turns right, right hand rotation.

  4. #4
    Join Date
    May 2009
    Location
    syracuse Indiana
    Posts
    425

    Default

    Standard rotation is left, reverse rotaton is right. All Supra's with PCM engines ran standard rotation which is LEFT hand. Note, Correct craft pcm's ran a reverse rotation, RH. Good luck Al
    Supra Beast
    Custom 496 MPI HO 425 hp
    Custom Teak floor

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