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2000 kawasaki 100 stx di bad plugs

3467 Views 3 Replies 2 Participants Last post by  moose
I have a 2000 Kawasaki 1100 stx di, last weekend it was running fine, then I went through a no wake zone and then it started running very poorly like the spark plugs went bad. I checked the plugs and they were black so I replaced them, I took it back out for only a couple minutes to test it and it was still running bad, when I check the new plugs again, 2 of them were black.

Anyone have any thoughts on what might be wrong?
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2000 1100stx di can't get to go faster than 38mph

im having the same problem,did u find out what was wrong,i would be very thankfull for some info.thank u
If I remember right it was the fuel injector.

What we ended up doing was buying the diagnostic software from Kawasaki and hooking a computer up to the jet ski to check it. I don't remember how much the software was, but we had to pick up an old laptop to run it on, either win95 or 98.

Hope that helps.
thank u for the info,the dealer is telling me it's the computer,without even checking it,when i checked the plugs #1 looks clean & little wet,but #2 & #3black like carbon build up,is that how ur's was,out of the water i get full rpm power but when it's in the water i can't get it pass 5000rpm,top speed i only get it to a bout 37mph,do u know if i can swap the injectors to check it.thank u
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