A little work to do before the season starts......
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A little work to do before the season starts......

  1. #1
    Senior Member Nordic78's Avatar
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    Default A little work to do before the season starts......

    last trip of last summer, heading back to the ramp, the motor siezed up at about half throttle with only a slight loss of power as any indicator of something wrong right before she went, on a lake with alot of debis I figured I had some crap in the intake, never had a chance to stop and look, turns out the old lady heard a bubbling sound when she was in the water behind the transom, about the same height as the crank ironically, pulled plugs, starter, the whole 9 and couldnt get it to spin so I pulled the motor and pulled it apart, the pictures pretty much say all the colorful words that came out of my mouth.....
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    Senior Member Widetrack's Avatar
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    I can bet that Dag Nabit wasn't one of them!


    SOMEONE SAID YOU CAN'T TAKE IT WITH YOU! SO,IM BURNING IT UP ONE GALLON AT A TIME!
    WT

    WFL Crew!!!

  4. #3
    Senior Member Nordic78's Avatar
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    Trying to post more pictures but having a bit of trouble, the first one worked...

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    Senior Member Nordic78's Avatar
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  7. #5
    Senior Member Nordic78's Avatar
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    Now the question is, what could have caused this? oil was fresh and level good, dual remote filters new, oil pump still appears to work, best I can tell I spun the second and forth main bearing

  8. #6
    Small Block Rockin' SJ-16's Avatar
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    OH CRAP

  9. #7
    "BEER BUDGET RACING" Bodean's Hammer's Avatar
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    I had a little deal like that happen to me a few years ago. As they say in california.....NO BUENO

  10. #8
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    Sorry for the bad luck.

    Is it possible that you got water in the cylinder while idling?

    Is the block still usable?

    Just curious, what are the specifications for your engine.

    Size, type, RPM, Impeller?

  11. #9
    Senior Member Nordic78's Avatar
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    77; Im no machinist but I think the block is toast, Im going to take it down to the machine shop and see if any of the rods are salvagable. I dont know if you can see it in the picture but theres a small crack in the number three main bearing that extends down into the block a bit, one of the cylinders is gouged pretty bad but might be boreable but theres a huge chunck missing down where the piston skirt sits so I guess I will find out soon. I hope to get a bit of help from the engine guys to rebuild this, I know jet boats have different clearances so maybe as I build this up some people can help a brother out. I just want to rebuil the motor to factory, no need for speed, this is the family mini-van, I have a 78 Nordic that I am doing a complete resto on and that will see a bit more HP, this boat is a 2000 ultra lx, A-impeler, maybe max 4200 rpm, 48-50mph, oval port(not sure the cc) 300-340 HP Gen 6 BBC with Hyd roller cam(not sure the profile yet though not too aggresive) Marine Power Sport-PAC engine, no experience with em), newer style through transom Log exhaust (Barr marine I believe with flappers, so I dont believe I sucked in water but I was tubing right before so who knows)........As I get more info from heads, cam etc I will update......

  12. #10
    "BOATLESS" blender over's Avatar
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    WOW
    Can u say Yard Sale!!

    Sucks...

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  14. #12
    Senior Member Daddy B's Avatar
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    Ouch, at least you got a new boat anchor out of the deal.

  15. #13
    Senior Member Nordic78's Avatar
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    Default Found the cause.....

    So I think that the catalyst of this mass engine suicide was due to an improperly installed/ damaged harmonic balancer, now maybe someone who knows more can lend a thought but I think that the engine was doomed from the factory, I havent heard of these things cashing in on such a mild motor before but I could be wrong. The orignal owner was a strickley river guy, no kids and used the boat to get to the first sand bar and throw shoes so it never became an issue, I use the boat everywhere and tube with the kids so I think this aggrivated the crack which started to bend, spinning bearings 2 and 4 and then broke once the heat became too much, the front half of the crank was still bolted into two of the mains so I dont think it happened when it broke. Any thoughts?

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