All-Terrain Lawn Tractor Forum

Like riding lawn tractors through mud, woods, rocks, and snow? Then this is the place for you! Share your ideas, Post your projects and more!
 
1990 Polaris Indy 500 running rough Lend10PortalHomeFAQSearchMemberlistRegisterLog inDiscordCountdown Timer1990 Polaris Indy 500 running rough Rend10
Welcome to the All Terrain Lawn Tractor Forum!
2019 Build Off Underway!
2019 Top Tractor Challenge! Aug 17th and 18th! DETAILS HERE!

Share
 

 1990 Polaris Indy 500 running rough

Go down 
AuthorMessage
BlackMountian88
Skilled
Skilled
BlackMountian88

Age : 20
Join date : 2012-09-08
Posts : 399
Forum Rep : 0
Location : NH

1990 Polaris Indy 500 running rough Empty
PostSubject: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeFri Jul 26, 2013 6:29 pm

Ok, so just this morning, I picked up a 1990 Polaris Indy 500. The engine has a couple little quirks, here's my best description;
The first two or three times I started it, it started right up, and idled well. I revved it a little bit, but never tried to move it.
The next time it started, it idled at around 500 rpm (warm, it should be 1900), and I tried to get it to move, but it would get to 2000 rpms, and just bog down.
Now, it needs the throttle held in order to start, and it will stall if you try to let it idle. It will not peak 3000 rpm. It will slowly accelerate to 3000, then just stop, you can hold the throttle all the way and it just sits at 3k.

Any ideas?

The previous owner had damaged the kill switch, so he had been using the choke to kill it (flood). The spark plugs do appear to be fine.

Thanks!
Back to top Go down
MowBandit
Skilled
Skilled
MowBandit

Age : 23
Join date : 2013-03-16
Posts : 477
Forum Rep : 0
Location : Haddock,Georgia

1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeFri Jul 26, 2013 6:50 pm

ok first remove the air filter clean it then take the carb off and clean allt he jets and wholes make sure its clean then try it again
Back to top Go down
Chopperhed
Moderator
Moderator
Chopperhed

Age : 52
Join date : 2012-10-14
Posts : 801
Forum Rep : 0
Location : Edmonton, Alberta, Canada Eh!

1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeFri Jul 26, 2013 7:22 pm

Jay_Rod wrote:
ok first remove the air filter clean it then take the carb off and clean allt he jets and wholes make sure its clean then try it again

If that doesn't help, it may be a dried out crankshaft seal.
Back to top Go down
http://http:\\members.shaw.ca\ducksgarage
Guest
Guest



1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeFri Jul 26, 2013 7:34 pm

Could in theory be something else too - but I forget if it has them. Reed Valve (s)... I cant remember if thats a reed valve motor though...

But it does sound like this problem I had with my old Harley cart... the reed valve had deteriorated, which would only allow it to run when the throttle was pinned much like you describe... once I replaced it all was well. Essentially what you may be looking for is a vacuum issue. Seals, reed valves (if equipped) even a carb boot. Check all gaskets for leakage of all kinds.
Back to top Go down
k2500life
Expert
Expert
k2500life

Age : 21
Join date : 2013-06-19
Posts : 1135
Forum Rep : 2
Location : Southern Florida

1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeFri Jul 26, 2013 8:43 pm

My foreman did this and turned out to be a stretched or broken timing chain
Back to top Go down
http://www.lastdropgarage.com
BlackMountian88
Skilled
Skilled
BlackMountian88

Age : 20
Join date : 2012-09-08
Posts : 399
Forum Rep : 0
Location : NH

1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeSat Jul 27, 2013 5:02 pm

Thanks guys. I'm pretty sure it's a drive belt.
Back to top Go down
Sponsored content




1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitime

Back to top Go down
 
1990 Polaris Indy 500 running rough
Back to top 
Page 1 of 1
 Similar topics
-
» 1990 Polaris Indy 500 running rough
» Polaris tires and rims
» polaris deluxe brushguard will NOT fit 2011
» polaris prototype
» 2006 & 02 Polaris Ranger + several other Popo''s & 1 Yamaha

Permissions in this forum:You cannot reply to topics in this forum
All-Terrain Lawn Tractor Forum :: Off Topic :: Off Topic-
Jump to: