Polaris 500 sportsman give it gas stalls

[Flipper Tiffany Roper Jones]

It's kinda hard to explain on the end of the cam I would call it a balancer but not exactly sure what you technically you would call It on opposite side of the sprocket there what I would call a balancer on the end of cam. Theres a spring and looks like a balancer. When I put the new cam in spring seemed loose so I spun it around once then put I it back in so snaps back kinda quick instead of very loosely hard to explain but heads off now everything looks good beating my head against the wall

 I dont understand it at all

[BuggyMasters]

If I remember right that’s the compression release and possibly what keeps the engine from rotating the wrong way.

[Frank Angerano]

Ok take a deep breath there is a reason why and you sound  like the type of person who will certainly get to the bottom of it as well as some help from us here at Quadcrazy! 

The springs on the cam should be the assisted compression release.   

Post some pics.    

[Flipper Tiffany Roper Jones]

Ok I will have to tomorrow it has like a pin that goes in end of cam has a spring on it and a weird looking piece of metal on the end just not sure how tight its supposed to spring back I'll do something so you can see what I mean 

[Frank Angerano]

Is supposed to be snug not super tight. There are a few different types of decompression mechanisms. Polaris is one of the far different ones I’ve seen.  The spring is a small round baby spring that sits in a hole? 

Go to YouTube and take a look.  Keyword Polaris cam decompression. 

I want you to try one more thing please.  Can you kinda do a bench test on the carburetor.  

Take the carburetor and mount it firmly.   Use some tie wire if you have to. Make sure it’s in the proper upright position and make sure the throttle cable and slide is all back together as if it were ready to be used.  You have to see what that thing is doing.  

Hook up the fuel line and open the petcock  Watch that baby for a day and see if any fuel is leaking out of it. Put a piece of cardboard under it as I mentioned earlier.  

Could be an internal failure that your not seeing. Maybe a fracture or something. 

 

 

 

[Flipper Tiffany Roper Jones]

I'll try anything once. I'll keep you informed. Its just my gas has never went down at all. I put a mark on the side of the tank just to make sure and in 2 weeks so far hasn't moved. But I'll still give it a try.

[Frank Angerano]

Well the gas is not magically getting into the oil. It could just be a slow drip. See what happens. 

Edited August 25, 2019 by Frank Angerano

[Flipper Tiffany Roper Jones]

Ok going on 5 hrs not a single drip but gonna leave it all night but if the decompression wasn't releasing would it pull more gas out of the carb than needed just curious cause I did install the spring to tight 

[Frank Angerano]

Is that fuel line hooked up to a fuel source? 

That’s actually a great question and something I’m going to seriously look into. Maybe that decompression not working pulls a vacuum ? It’s definitely a possibility. 

 

[Flipper Tiffany Roper Jones]

Yea I have it straight from gas tank to carb.

I was just wondering cause before fuel pumps the compression is what sucked the gas it needed so if its pulling so much where spark doesn't work and why its turning over so ridiculously hard reseated valves going back together  now 

[Frank Angerano]

Ok great work. Keep me posted. 

[Flipper Tiffany Roper Jones]

I have to put carb back on 6 hours not even a smell of gas let alone drip so I'm putting it back on 

[Frank Angerano]

Go for it. So top end the decompression system. What have you replaced/done ?

[Flipper Tiffany Roper Jones]

I just started it without spark arrestor sounded awesome so were putting together the finishing touches I'll b so ticked off if the compression release was the whole problem all along 

[Flipper Tiffany Roper Jones]

Ok well put it all back together boom fires and idles instantly but as soon as you hit the gas it stalls motor I no for s fact is great unhooked black wire same thing now what

[Flipper Tiffany Roper Jones]

Anyone have a good wiring diagram someone installed a winch started idled great but in the meantime wires to ecm getting so hot melting the insulation I need a wiring diagram with the worst news I'm mechanically strong motors great next is something stupid 

[Frank Angerano]

Ok sounds like progress. So a wiring diagram ? 

What year was it again ?

[colin james]

what year 500

[Flipper Tiffany Roper Jones]

Yea 1999 Polaris 500 yes its starts like now idles awesome but someone put a winch on it before I got it its tapped into everything. I'm a electrician for 25 years working on em is more as a hobby I by em fix em then let the kids run em into the ground lol. The person I bought it from replaced all those parts and cant figure out what's wrong so hint(there being super veg) that why I need a wiring diagram from front to back. I have never seen a ecm tied into a headlight before in my life not even the ground because of noise interference but haven't worked on everything so maybe it does but wont no without a diagram. But I mean as soon as you hit button fires immediately so has to be something small and stupid

[BuggyMasters]

You happen to have any carb cleaner? If so, let it idle and when you give it gas, at the same time give it is little shot of the carb cleaner and tell me what happens. You are now making me wonder if the vacuum slide is not working or something. If you give it the shot and all the sudden it picks up on that, you know you got a fuel issue.

And LOL on your comment about the speedometer controlling so much, yeah...it is kinda amazing. I used to part those machines out on occasion and that was the first thing to go.

[Flipper Tiffany Roper Jones]

Okwhat through the air cleaner. I'll try it tomorrow got late. I was wondering now that its definitely outside the motor if the dumbass bought the wrong carb this could be the one for h.o. for all I no. Do you no what size main jet and sec jet is supposed to be 

[Frank Angerano]

 

pages 303 on.  

 

[Cjames58]

I sent you a pm with the factory wiring diagrams 

[BuggyMasters]

The main on those is a 152.5 and I just noticed the picture you put up of the carb, that’s the cleanest factory carb I ever saw....so like I’m thinking...is that a China carb? Does it say Mikuni on it? The China carbs have one big problem...wrong jetting. I’m going to guess if you give it that shot of carb x,earner when you crack the throttle it is going to rev. Now I can’t wait for you to report back.

[Flipper Tiffany Roper Jones]

Thank you guys and sorry this forum is such a pain in the but its unreal theres no quick way of seeing my messages from you guys. I have to search google find quad crazy its frustrating. Then when I click on your guys messages in my email I have to login again instead of auto login I have to try to log back in so I back out then loggin

[Flipper Tiffany Roper Jones]

That's what I said you have no idea how many parts they thru at this trying to get ig working right definitely cleanest carb I've ever seen to anyone no what main jet and sec jet is supposed to be now I believe it's a carb issue looked Chinese to me and thanks for the diagram I'll check asap and let u no

[Frank Angerano]

Lol no need to thank us! That’s what we’re here for !! Wiring is one of my strong points so any clarification you need feel free to ask. Nice work  so far and keeping your cool, this thread may beat the one me and @JacobSlabach had on his bayou 400.  That was a long one I’m going to have to go back and look! 

Keep us posted.   

FYI you can have Quadcrazy on your smartphone. 

[Flipper Tiffany Roper Jones]

What on God's green earth would have caused this. It's the decompression lever. It busted clear through the case. I installed it just like manual said keep spring completely relaxed if you wind spring up once it wont work. Now look its demolished.

[Frank Angerano]

Holy crap ! What do you mean it busted through the case ? 

[Flipper Tiffany Roper Jones]

You no the cap that covers it it busted right through it you can't tell in the picture because the pieces are covering it I'll snap you another one real quick. What on earth would cause that theres nothing in there besides a flip lever for god sakes.