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Thread: Fast Fred's Secrets of the OMC MOD50's Thread #1

  1. #331
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    ya that just for lookin, don't think it would run to Hot, be bustin somethin up in short time.

    Hey 850,
    ya still the same, workin at the Local marine, long days, ya would like to see that Mod50 lookin Yamaha 90hp with the Merc drive
    puttin on a Fresh Mod 50 power head right now ya it's All good

  2. #332
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    ok, see what this looks like

  3. #333
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    ok the narrow rod is in the top or number one hole,big A-frame rod in number two, middle,, Mod50 rod in number 3 hole, bottom. ( see last page)

  4. #334
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    from the Top, number one.


  5. #335
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    finger ports are in this one already, at 19-s Mod50 spec, just roughed out,
    she was over OVER bored on me, any who, she will work well for this DEMO so lookin at ware them pins line up, Ya, it's guna work with them OLD style narrow rods and Bullets, finger ports need to be touched up for best turn out but way workable

  6. #336
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    hole number 2, center, got the newer A-frame rod, pins on this piston are at ( exhaust port center bein 12 O'clock,) one pin is at about 9 O'clock the other at about 4 O'clock . this would Work,

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  8. #338
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    on the last or bottom hole with the Mod 50 rod and bullet just guna have it TOP pined on the pencil Mark.

  9. #339
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    So the idea is to make sure the pins and ring gap runs up and down over a consistant surface and not over the edge of tha ports?? Am i on tha right track?????

  10. #340
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    yes, you don't want to upset the rings. the gap has to ride on the wall or some what centered in the port. half on the wall and half in the port will never last, it will just kill it's self in about a hand full of pulls
    you want it so the rings and the piston kinda don't even know the ports are thare, thats guna stay together,

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