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Thread: Finger ports, how to find where to put them

  1. #21
    Team Member Mumat's Avatar
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    A buddie of mine has a Monty preped loop 6 johnrude and Monty put the ring end gap wright in his finger ports. I would have swore it would snap rings but it does not I wish I would have taken pics when it was apart.

  2. #22
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    see if this works...........
    Attached Images Attached Images  

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

  3. #23
    Team Member Mumat's Avatar
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    From what I read those are mbre sleeves for a 3.0 evinrude

  4. #24
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    bout time for an installment hear.......

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

  5. #25
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    Any more news to share on this Fast Fred?

  6. #26
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    Where are the ring end gaps in those sleeves?

  7. #27
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    you want the end gap to run in the center of the finger port. it can be a bit off center , but not by much. you can have the end gap pins moved, so the end gap is always on the cyl wall ,adds cost. thats why it's beat to know ware the end gap runns before you start cuttin the cyl

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052

  8. #28
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    Hi Fast Fred,

    What is the different between build up port on the piston compare the original one. Thanks

  9. #29
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    Hi Fast Red,

    What is the perfect dimension cut/sized (wide and long) of port suitable for Yamaha 50hp 3 strokes model 6h4?
    Another question is why my engine always overheat during the race and damage my Wiseco piston (P4 size), is it cooling system fail or 2t add to fuel not enough?
    Thanks sir

  10. #30
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    Post some photos of the piston from all sides..
    Do you run extra piston to bore clearance to allow for the forged piston

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