Hello all!!

Is there anyone who knows if there is any air or fuel screw on my SP700 -03. In the polaris parts manual there is something in the carb they call "adjuster" (ref nr 28-31 in the manual) , but i havenīt found this screw on the carb!

My problem is that when i raise the trottle just a little, the engine starts to run badly(sounds like when you are in reverse and give to much trottle, it starts to missfire), if i then raise the trottle a little more, the problem goes away and itīs running perfectly. Iīve tried to change the pilot jet from 47,5 to 50 but then its getting to much fuel.Mabye i should try a smaller pilot jet??

When i had my polaris to the dealer, he raised the needle one step(more fuel), It became better but not good.

Anyone who knows what to do???

Regards /T

 

Its number 31, in this view. carb
There may or may not be a cover over the counterbore that the screw is recessed into. Its a small, brass colored, slotted screw.
Youre on the right track, a missfire is probably due to lean, so a bigger pilot jet and a final tweak with the mixture screw should do it. Its a mixture screw, so turning out is richer.

 

Thanks for the answer [img]i/expressions/face-icon-small-smile.gif[/img]

There is a cover with a tiny hole over this screw. Iīm going to take the cover away with a drill tomorrow, and then try to adjust.

I think iīll try to adjust with the factory jetting first(47,5) and if that doesnīt work, change the pilot jet to 50 and then try to adjust.

It will be interesting to see if this works [img]i/expressions/face-icon-small-smile.gif[/img]

Regards from Sweden

/T

 

Hello again!

Now i have adjusted the mixture screw.I turned it out for 3/4 of a lap, and now it runs perfectly [img]i/expressions/face-icon-small-smile.gif[/img])

Thanks Hondabuster for the advice.

/T

 

Glad to help, just remember where this screw is, because youll be adjusting it again. Things like gas quailty, humidity, temperature, and altitude all effect the idle circuit, because the pilot jet is so small. So dont be concerned if you need to adjust it again.
If the screw gets to more than 4 turns out, from seated, then its time for a bigger pilot jet.

 

Okej!

Thanks for the advice, i really appreciate it [img]i/expressions/face-icon-small-smile.gif[/img]

/T