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Thread: SBT Engines???

  1. #1

    SBT Engines???

    Anyone ever use one of the sbt engine rebuilds? Particularly the polaris 780? If i cant get mine running right, im seriously thinking about picking up one of these. When i look back on the time, tools etc that I have spent, i prolly woulda been better off going the SBT route. I did learn every inch of the machine which I have to admit is fun BUT ITS STILL NOT RUNNING RIGHT. Please advise


  2. #2
    ujustlost's Avatar
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    for SBT, have had no problems and prices are the best in the business. Whats wrong with your ski, maybe we all can help and you wont have to spend any money

  3. #3
    Connecticut CrazyA's Avatar
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    Your best bet is to read, read, and read some more. There are plenty of threads about SBT out there. You'll have to make a decision based on what you feel comfortable with.


    http://www.greenhulk.net/forums/show...ht=sbt+engines



  4. #4
    casey67's Avatar
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    You will need to transfer your parts to the rebuilt engine ( carbs-ignition) Heck,some times changing all the gaskets might fix a problem. A different engine may not answer all your questions.

  5. #5
    ph2ocraft's Avatar
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    From what I remember you were still not even sure if you were getting a good fuel supply, a new engine won't solve a fuel supply problem (unless of course the engine has no compression and can't operate the fuel pump).

    You need to start with what you know and solve critical issues at hand.
    Go down to harbor Freight or any cheapie store, get a fuel pressure gauge and find out what the fuel pressure is in your system.
    You need to have roughly 11/2 pounds at idle and 4 when you go the WOT.
    Did you ever verify your pulse line was good?
    Compression in all cylinders etc?
    Maybe you should start a post as to what your particular problem is and what you have done to this point.
    These engines are not hard to figure out. With a few bucks and some time there is no reason you can't fix this.

  6. #6
    Pulse line is new and cut to the exact length as the original. Ive rented two fuel pressure gauges and neither read down the 1.5 - 4 lb range. I will go to harbour freight right now and see if i can get a better one. I believe the head on the mag was beat up. I ground the high spots but now fear I may be creating hot spots. Will look at that too and maybe replace with one off the other ski. I agree...the motors are simple. Thats why Im so frustrated.

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Lockout View Post
    ...I will go to harbor freight right now and see if i can get a better one...
    Why does that just sound funny?

  8. #8
    ph2ocraft's Avatar
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    Quote Originally Posted by K447 View Post
    Whay does that just sound funny?
    LOL. I was rolling over here, that was funny!!

  9. #9
    HF had nothing but shit...I got a jeggs fuel guage at a harley davidson store here in pensacola.

  10. #10
    ph2ocraft's Avatar
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    Excellent, so what's you fuel pressure at idle t'd inbetween the fuel pump and carbs?

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