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Thread: ProMax Rebuild

  1. #1
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    ProMax Rebuild

    Well I pulled the ole ProMax off to begin my rebuild. Looks like I am just in time!

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    We only go through this circus once...so enjoy the rides!!!

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  3. #2
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    Damn. u timed that perfect , lucky is what u r. Haha

  4. #3
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    Quote Originally Posted by Merc 2.5 View Post
    Damn. u timed that perfect , lucky is what u r. Haha
    Thanks Merc, it’s mostly because of your thread I decided to go ahead with the rebuild.
    We only go through this circus once...so enjoy the rides!!!

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  6. #4
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    Here is the crack at the bottom end of my exhaust chest on the block. Sounds like James Perry is taking a break for a while. So who would you guys recommend for engine machine work?
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    Last edited by Hydrodreams; 12-03-2020 at 06:54 AM.
    We only go through this circus once...so enjoy the rides!!!

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    I'm not sure but if u find sumone really gud let me no to

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    Quote Originally Posted by Merc 2.5 View Post
    I'm not sure but if u find sumone really gud let me no to
    Will do Merc!
    We only go through this circus once...so enjoy the rides!!!

  9. #7
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    Nice talking to ya hydrodreams. Very nice guy and best of luck on rebuild. dont forget post lots of pics as u go

  10. #8
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    Hey Merc, it was a pleasure speaking to you as well! Thanks for the good luck. I certainly will post a bunch of pictures and updates. I know your rebuild thread has helped me a ton. Take care and Happy Thanksgiving!
    We only go through this circus once...so enjoy the rides!!!

  11. #9
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    Jay Jim Charles Jerry each has their specialty not sure who is the promax one though.

  12. #10
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    Quote Originally Posted by Motv18 View Post
    Jay Jim Charles Jerry each has their specialty not sure who is the promax one though.
    Thanks Motv, spoke to a shop yesterday not too far from me in VA called Black Magic Racing Outboards. Kenny the owner seemed like a straight forward knowledgeable guy. Would be nice to take my stuff there vs. shipping. Anyone have any input?
    We only go through this circus once...so enjoy the rides!!!

  13. #11
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    Quote Originally Posted by Hydrodreams View Post
    Thanks Motv, spoke to a shop yesterday not too far from me in VA called Black Magic Racing Outboards. Kenny the owner seemed like a straight forward knowledgeable guy. Would be nice to take my stuff there vs. shipping. Anyone have any input?
    U know that's prob a gud idea. Maybe start a new post with black magic racing as title. I bet sumone on here has had dealings with em

  14. #12
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    Well got her all tore down today. Took a bunch of pics as people have suggested. I will make this post about the biggest issues I found.

    So the piston in this post is #4. It's cylinder wall showed a tell tale sign seen in the pic above. Looks like the locator pin worked loose, hit the port, and snapped off. There is only about a 1/16 of an inch left in the ring groove.

    The broken bearing and rod journal on the crank are from cylinder #1. The plastic cage and the roller were still in place just cracked. When I took the rod cap off it looked intact, but as soon as I picked it up with my fingers it fell apart. The journal feels smooth yet has some brown streaks around it. I think it was where the cracked plastic cage was moving around and rubbing off on the journal.

    Other than those two issues everything else looked really good. The only other concern will be the crank wear ring wear in the block. That's what the machine shop gets paid the big bucks for!

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    Last edited by Hydrodreams; 12-03-2020 at 06:58 AM.
    We only go through this circus once...so enjoy the rides!!!

  15. #13
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    Also here is the #1 rod surface which had the cracked bearing cage.
    Click image for larger version. 

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    Last edited by Hydrodreams; 12-03-2020 at 06:58 AM.
    We only go through this circus once...so enjoy the rides!!!

  16. #14
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    2 things. 1st is the rod or rods look for any kind of scars or maybe the bearing surface looks blue from heat. I dont think ur suppose use a rod that bearing surface is blueish.

    2nd. Same with crank. look for the same. These ain't like car cranks. Cant b turned and resurfaced

  17. #15
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    Quote Originally Posted by Merc 2.5 View Post
    2 things. 1st is the rod or rods look for any kind of scars or maybe the bearing surface looks blue from heat. I dont think ur suppose use a rod that bearing surface is blueish.

    2nd. Same with crank. look for the same. These ain't like car cranks. Cant b turned and resurfaced
    Agreed Merc, the rod and cap have that small brown streak on the front side in the picture. All the other colors in the rod pic are reflections.

    The crank has the brown color in the middle of where the bearing would be. As you can see in the picture. Nothing blueish at all indicating heat. I was wondering if that piece of plastic floating around in there hadn't rubbed the surface and discolored the crank? I will hit it with crocus cloth and see what it looks like afterwards.
    We only go through this circus once...so enjoy the rides!!!

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