Hard starting engine? - Page 4 - Snowmobile Forum: Your #1 Snowmobile Forum
http://www.snowmobileforum.com
Go Back   Snowmobile Forum: Your #1 Snowmobile Forum > Snowmobile Tech / Mod Center > Engine / Drivetrain


» Sponsors





Reply
 
LinkBack Thread Tools Display Modes
Old 12-16-2011, 12:57 PM   #61 (permalink)
Registered User
 
Join Date: Dec 2011
Posts: 1
Hi, I'm having several related or unrelated problems with my 1983 Indy Trail 440.

1. From a cold start I'm not able to start the sled up at all anymore without pulling the plugs and adding fuel to the cylinder, Once it is "warm" i'm able to start it no problem.

2. After I've run the sled on the trail for awhile, 20-30 minutes... one side of the engine seems to stall, sputter and spurt, and shortly there after both sides stall. I'm stuck however far I made it. Once i let it set and cool for about half an hr, i can restart and go for awhile again. (trying to get back to the truck)

I originally thought it was the CDI, because when the engine stalls in the field it doesn't seem to have any spark. But after reading here on the forums, it sounds like that could just be caused by the flooding AFTER it stalls. I carry multiple sets of plugs and swap them out all the time, doesn't seem to make a lot of difference. The symptoms sound really similar to what other people have posted about. Can you confirm that the probable cause is the carbs and need to completely clean/rebuild both carbs? (the right one seems to be worse then left).

Also if anyone has any manuals or reference material that would be awesome too, since it is so old i'm having trouble tracking down any info.

Thanks
NWSledder is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-16-2011, 03:36 PM   #62 (permalink)
Registered User
 
Old Man's Avatar
 
Join Date: Dec 2007
Location: Dinorwic Lake, Ontario
Posts: 451
Sounds like you have several problems. First, the cold starting problem is probably caused by a non functioning enrichment circuit (people commonly call this the choke, but a choke restricts air, an enrichment circuit adds extra fuel) in the carbs, and/or clogged pilot jets in the carbs (responsible for supplying fuel from 0 to 1/4 throttle). A complete cleaning of the carbs is in order paying special attention to the pilot jets and a definitely check the function of the enrichment circuit. The loss of spark after 20 to 30 minutes of operation, sounds like a coil problem, as the coils heat up they breakdown and cease functioning. Check the following links out. They may have the information you're looking for in the form of service manuals

http://www.vintagesnow.com/Polaris.html

http://www.vintagesnow.com/Polaris_f...arberation.pdf

Last edited by Old Man; 12-16-2011 at 04:00 PM.
Old Man is offline   Reply With Quote
Old 12-30-2011, 03:30 PM   #63 (permalink)
Registered User
 
Join Date: Dec 2011
Posts: 25
Wow, what a difference. I cleaned my carbs with a wire and drained the crank. It starts with just 2 or 3 pulls now. I am also shutting of the gas and letting it run for 30 seconds with the gas off before turning it of now. But, if all that gas was in the crank, do I need to add oil to the crankcase?
lmassy is offline   Reply With Quote
Old 12-30-2011, 11:57 PM   #64 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,097
Two stroke engine = no oil in crank case.
It is injected into it by a pump.
That is why there is a tank for oil.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 03-17-2013, 01:25 PM   #65 (permalink)
Registered User
 
Join Date: Mar 2013
Location: washington
Posts: 2
i have a 93 formula 600 that ran great for a couple months. During the middle of a trip shut it off and couldn't get it to restart-towed it in and took it into the shop. The mechanic said I had a loose wire on secondary coil and a dirty carb. Two days later took it out and after an hour of riding shut it off and same issue. Couldn't restart. Took it back in and my mechanic can't figure it out. He can start it and get it to run but as soon as it shuts off he has same problems I have. He is pulling his hair out. The plugs show 2 cycle glean but he has to use compressor to dry cylinders before we can get it running again. Any ideas?
richb8612 is offline   Reply With Quote
Old 11-28-2013, 03:23 PM   #66 (permalink)
Registered User
 
Join Date: Nov 2013
Location: Indiana
Posts: 37
So my neighbor came down today with a 95 Arctic Cat cougar he just picked up and said the only way to start it is to hold the throttle about an 1/8 of the and it will fire up on the first pull but it doesn't idle either unless you hold it in the same spot. I haven't started working on it I did see it has the carb switches bypassed. Any suggestions.
Soloud is offline   Reply With Quote
Old 11-28-2013, 05:21 PM   #67 (permalink)
Registered User
 
Rczr600rider's Avatar
 
Join Date: Apr 2012
Location: Amsterdam, New York
Posts: 1,111
Start with the basics, clean the carbs and make sure to floss the jets.

Sent from my MB865 using Snowmobile.com App
Rczr600rider is offline   Reply With Quote
Old 11-28-2013, 09:49 PM   #68 (permalink)
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 32,097
Throttle cable is too tight.
There should be 0.030 of slack at the throttle perch between the flipper and the block when at rest.
__________________
Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

'90 Wildcat Project in progress.

Vintage (sorta)
1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


Worshipful Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline   Reply With Quote
Old 11-28-2013, 11:28 PM   #69 (permalink)
Registered User
 
Join Date: Nov 2013
Location: Indiana
Posts: 37
Thanx ill check it out once I get his other one out of here.
Soloud is offline   Reply With Quote
Old 12-07-2013, 09:47 AM   #70 (permalink)
Registered User
 
Join Date: Nov 2013
Location: Indiana
Posts: 37
It's dialed in now had to replace the throttle cable, and reset the carbs. Now it fires up on the first pull thanks for the measurement
Soloud is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 12:55 AM.



Copyright SnowmobileForum.com

Search Engine Friendly URLs by vBSEO 3.6.0