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  1. #1
    Join Date
    Sep 2018
    Posts
    3

    Default PCM 351 soft seized?

    Hello all, new to this forum, thanks for having me. I have an Ď87 Comp TS6M I got from a friend recently. The PCM 351 was recently rebuilt, but has enough hours onit that Iíd consider it well broken in. I thought I had a starter issue as it never cranked easily when cold. Having eliminated that by replacing the starter and solenoid and cleaning everything up, Iíve realized itís actually the motor being quite difficult to turn. Iím willing to consider the thing is soft seized, but that seems a bit unlikely as it runs well when it does and will fire up and run fine if jumped off my truck. Not farmiliar with the drives on these boats, so hoping maybe something else is preventing the motor from turning. Any thoughts would be much appreciated.
    1989 Sura TS6M COMP

  2. #2
    Join Date
    Jul 2007
    Location
    Flowery Branch Georgia
    Posts
    2,742

    Default

    Are you talking about a situation when the engine wont spin freely when starting and tends to lobe and stop before moving another half turn? We used to call that a heart attack start.

  3. #3
    Join Date
    Apr 2002
    Location
    Austin
    Posts
    2,164

    Default

    Are the battery cables original? Been tuned up not too long ago? (cap, points, etc)

  4. #4
    Join Date
    Apr 2002
    Location
    Florence, AL
    Posts
    778

    Default

    Have the battery load tested to rule out a weak battery and check all the cables. After that, I would check the timing; Perhaps the distributor was reinstalled one tooth off. That will make for hard starting.
    1992 Supra Mariah - Red
    PCM 351HO 285hp - PCM 1.23:1 Transmission
    OJ XMP 4 Blade CNC 13x15.5RH

    "People do weird things to boats" -Unknown

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