All-Terrain Lawn Tractor Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.

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!
 
PortalHomeSite RulesEventsFAQSearchRegisterLog inBuild-Off

 

 1990 Polaris Indy 500 running rough

Go down 
4 posters
AuthorMessage
BlackMountian88
Member
BlackMountian88
Member


Age : 25
Join date : 2012-09-08
Points : 4886
Posts : 399
Location : NH

1990 Polaris Indy 500 running rough Empty
PostSubject: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeJuly 26th 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
Member
MowBandit
Member

2014 Build-Off Entrant
2014 Build-Off Entrant

Age : 28
Join date : 2013-03-16
Points : 4742
Posts : 477
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_minitimeJuly 26th 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
Chopperhed
Moderator

500+ Posts
500+ Posts

Age : 58
Join date : 2012-10-14
Points : 5247
Posts : 801
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_minitimeJuly 26th 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_minitimeJuly 26th 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
Veteran Member
k2500life
Veteran Member

1000+ Posts
1000+ Posts!

Age : 27
Join date : 2013-06-19
Points : 5364
Posts : 1135
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_minitimeJuly 26th 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
Member
BlackMountian88
Member


Age : 25
Join date : 2012-09-08
Points : 4886
Posts : 399
Location : NH

1990 Polaris Indy 500 running rough Empty
PostSubject: Re: 1990 Polaris Indy 500 running rough   1990 Polaris Indy 500 running rough Icon_minitimeJuly 27th 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
-
» 22hp intek vtwin running rough
» Hello from INDY
» Hello from Indy
» [DNF] [22 BO] FatMikes Craftsman INDY "E.P.O.C."
» craftsman update 26" polaris wheels

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