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  1. #1
    injected2stroke's Avatar
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    2003 GPR Life Span

    Just wondering what the approximate life span of a upper end on a 2003 GPR should be. Over the last year it seems to be losing a little power over all. At this time there is 160 hours on it and it runs ok, but not as strong as it did last year it has lost about 100 RPM's. I hate to say it but for the most part the boat only has two speeds stopped and wide open and I am just thinking it might need a upper end rebuild. maybe some of the forums tuners can chime in on this. Thanks


  2. #2
    philip_gpr's Avatar
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    you could start by doing a compression check

  3. #3
    If your not doing something, its hard to screw up. stlouisramsfan's Avatar
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    + 1 check compression

  4. #4
    injected2stroke's Avatar
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    compression still seems fairly good at (1) 148, (2) 150 and (3) 145.

  5. #5
    Happily Self-Employed WFO's Avatar
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    160 hrs

    I had no idea you had that many hours on the boat.

    I usually push them to 100, then start thinking about a rebuild. My stock crank had a journal start walking at 40hrs. Some last a lot longer, but not usually my luck.

  6. #6
    vomitspot's Avatar
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    mine is at 185 hrs
    turns a 14-20 dynafly 6990 rpm yesterday
    only engine mod is d plate

  7. #7
    JKR1300's Avatar
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    I have 450 hours on my ski. This includes
    two rebuilds. No reason you can't get 200 hours
    B/T engine overhauls if it's tuned correctly.

  8. #8
    One day at a time..... N8R's Avatar
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    260hrs WOT since rebuild 2 years ago hrs ported 1300. Thanks Jim

  9. #9
    Ramps's Avatar
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    Comp Good...

    Look at cleaning/rebuilding carbs

  10. #10
    injected2stroke's Avatar
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    Thanks guys I guess after the season is over it will be time to give it some major attention.

    WFO it has a few hours on it. Ron's actually has more than mine and that may be the difference in performance. We did manage to get his back close to mine over the week end that problem in the front cover I belive did cause him close to a 100 RPM.

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