79 jag carb - Snowmobile Forum: Your #1 Snowmobile Forum

therealdude · 12-13-2006, 06:49 PM

ok i think i found out the reason the y my motor wont go. i think its couse the carb is not shooting gass in the motor. can you fix this problem or will i have to get a hole new carb.

therealdude · 12-13-2006, 08:12 PM

?????????????????

brideauj · 12-13-2006, 08:31 PM

The carb wont 'shoot' gas. The engine will 'suck' it in. You can probably fix it, but your going to have to get a little more familiar with your machine and be more specific of the symptoms.

Do you have spark? Are the spark plugs wet after you try and start the sled?

SawBlade · 12-13-2006, 09:42 PM

based on your question, it would probably be best to take the sled to a shop. if you want to ride this year, that is.

That said, the 79 jag is a great sled to learn on. if you have the time, buy a repair manual and take it apart. learn how it is supposed to function. learning is easy if you have the time. document everything you remove and the order in which you remove and picture also help.

then when youo have questions or dont understand something, ask these guroos here on this website. there is a hugh amount of excellent knowledge on this site. these dudes are top notch and always seem willing to help. I'm very impressed with these experts.

JEFFH · 12-14-2006, 12:14 PM

I would start by cleaning the carb, sounts like something is plugged. The carb dosn't spray fuel, the engin sucks the atomized fuel through the ventury into the engin.
If you are not sure how to rebuild a carb find someone who knows what they are doing, and have them show you. One misplaced part could cause severe engin damage.....THATS BAD!!!!

**RJ Gleason** · 12-14-2006, 03:33 PM

Look here for the info that you need if you are going to attempt it yourself.
http://www.snowmobileforum.com/engin...html#post48900

therealdude · 12-14-2006, 04:43 PM

o ok and ya the spark plugs are sparking but they are not getting wet.

**RJ Gleason** · 12-15-2006, 01:41 AM

How is the compression on the engine?
100psi or better and within 10% of each other.
Ideal is 120 or better.

**smallengineguy** · 12-15-2006, 06:48 AM

Get a windex bottle and put some 2 stroke mix fuel in it. Squirt it into the carbs. Does it start? If it does, remove and rebuild the carbs.

therealdude · 12-15-2006, 10:32 PM

Quote:

Originally Posted by smallengineguy

Get a windex bottle and put some 2 stroke mix fuel in it. Squirt it into the carbs. Does it start? If it does, remove and rebuild the carbs.

ok i will try that

therealdude · 12-16-2006, 02:46 PM

alright i was just out side and put a tabel spoon of gas in where the spark plugs go and it started fine and ran fine(did not quit) but when i shut it off and left it for 5 mins and tryed to start it agen it would not go. so i put more gas in the spark plug hole and it worked agen. but same thing happed

brideauj · 12-16-2006, 07:28 PM

Does the machine have a primer? If not, it probably should. Two to three pumps of the primer befor starting the sled should accomplish the same as the tablespoon of fuel.

A properly operating carburetor should start after a half dozen pulls without the primer however. So, it sounds like your carburetor needs to be rebuilt.

therealdude · 12-16-2006, 11:58 PM

i was just out in the shop and cleand out the carb and used carb cleaner soo i will try and start it up tomoro.

therealdude · 12-17-2006, 08:29 PM

hey just to say i got it going its its working great thanks for all the help.

brideauj · 12-18-2006, 08:37 PM

Great work, i hope you've got snow (unlike those of us in New England) to run it on!!