1994 Polaris SL750 Hesitation Problem

[PolarisRider]

The only modification I have is Ocean Pro Vortex flame arrestors on each carb and the high flow fuel pump. The problem I am having is from idle to mid throttle. It starts fine and runs from mid to full throttle fine. I have to pump the throttle from idle to full throttle, if I don’t, then it will bog down (hesitate) and stop. It only had a slight hesitation until recently when a friend of mine flipped the ski over. When this happened 1 or 2 inches of water got in the ski and it would not start until I dried it out. Water was around the flame arrestors. Not sure if this had any effect, but I felt I needed to mention it. My current carb. settings are as follows:

Low speed screw: ½ turn (all)
High speed screw: 1-1/4mag, 3/8center,7/8pto

I have tried different high speed screw settings on the carbs, but no change ( +- 1 turn from above settings changing ¼ turn per test). Anyone have any ideals?

[primerib]

Re: 1994 Polaris SL750 Hesitation Problem

When the bike flipped, did you or your friend follow the "capsized craft" procedure in your manual? The are quite adamant that you do this as soon as it's flipped.

Daryl

[PolarisRider]

Re: 1994 Polaris SL750 Hesitation Problem

No water got in the motor. Like I said it does run.

[Technical Support]

Re: 1994 Polaris SL750 Hesitation Problem

Well, water got somewhere - in the motor, in the electrical box, etc. Do a compression check.


Did you rejet/adjust for the aftermarket filters?

[PolarisRider]

Re: 1994 Polaris SL750 Hesitation Problem

I did check the electrical box, and it is dry. This happend on the second time the ski was taken out. I checked compression at the begining of the year it was:

Cylinder 1: 135
Cylinder 2: 133
Cylinder 3: 131

[Technical Support]

Re: 1994 Polaris SL750 Hesitation Problem

And that tells you what about it now??

[PolarisRider]

Re: 1994 Polaris SL750 Hesitation Problem

Cylinder 1: 130
Cylinder 2: 135
Cylinder 3: 130

[Technical Support]

Re: 1994 Polaris SL750 Hesitation Problem

Good, now you know that is ok. I would start with the electrical system, making sure every connection is tight and dry, especially at the battery and in the box. Next, time to go through the carbs.

[PolarisRider]

Re: 1994 Polaris SL750 Hesitation Problem

Ok, everything electrical is dry, including the electrical box where the CDI is. I have adjusted the low speed screws by 1/4 turn (increase), this has helped some. Any other ideals?

[surveyguy]

Re: 1994 Polaris SL750 Hesitation Problem

sounds like maybe carbs. I know it's a different carb and not a two-stroke, but my motorcycle did what you're talking about. I had to have them boiled out. On our carbs, you just rebuild those dudes. Has this ever been done? 11 years on those carb internals is a LOT to ask.