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Thread: SL 650 question

  1. #1

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    SL 650 question

    Hey guys.. I have a 93 sl650.. new triple outlet pump on the way but in the mean time I have been taking it fairly easy on the engine.. running full speed for about 5 seconds and going down to half throttle. Well today I filled it up with 91 octane and poured some seafoam in there to clean it out a little and replaced the plugs. All 3 plugs looked normal.. No white plug in the MAG cylinder but it seemed to run a little slower? It was pretty weird. Motor ran normal but it just felt all in all slower. Any Ideas? No stuttering issues or anything


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Pump bearings starting to get tight?

  3. #3

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    I am not sure.. I just thought it was weird with higher octane petrol than I was running in it before that it's slower now. Maybe I am just getting used to the speed of it. It wasn't crawling or anything just didn't feel like it did when I was out with it a few days ago

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by RidinWaves View Post
    ... filled it up with 91 octane and poured some seafoam in there...

    Motor ran normal but it just felt all in all slower...
    Higher fuel octane reduces engine power slightly.

    Seafoam also reduces engine power slightly.

    Warmer air temperatures reduce engine power.

    That said, if you suspect something isn't right, do what you can to diagnose the issue. It can be heart breaking to melt a piston down and discover afterwards that some diagnostic or maintenance effort up front could have avoided the problem.

    Seafoam is NOT useful in any Polaris PWC engine. If it does anything, it loosens up gunk which then travels into the carb and gets stuck somewhere inside. My opinion is that if something in the fuel system needs cleaning or isn't running right, then it needs proper disassembly and cleaning or other maintenance, not Seafoam.

  5. #5

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    Good point about the seafoam.. I just love the stuff though i've used it in pretty much everything I own with a motor with decent results most of the time but probably not again in this machine.. I made sure that I checked out the motor after I parked it so I popped the seat and felt the cylinders.. Not hot at all and they all felt the same tempature so thats a good thing. Hopefully It was just the gas and the seafoam slowin it down a little bit.

  6. #6
    Polarisitis loonatik's Avatar
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    Since upgraded to tripple outlet pump, you could be a tad rich too. Skip the Seafoam and check your piston wash after a tank or so to see where you're at.

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