Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tractor Talk Discussion Forum

Way OT- Snowmobile

Welcome Guest, Log in or Register
Author 
Bret4207

02-19-2007 15:52:54




Report to Moderator

Got a "93 Ski Doo Mach 1 twin cylinder, no electric start. Not sure on engine, but I think it"s a 600cc or more. No electric start either, but it"s in good shape and only $300.00. We"ve run it for 2 years and probably have gone through 20 plugs, NGK"s. They foul out something fierce.

Does anyone know these machines and how you lean the carb out? Snowmobile tech stopped in 1973 for me. I didn"t even know they had oil injection till I got this thing. Thanks!

[Log in to Reply]   [No Email]
Brian in NY

02-20-2007 06:11:17




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
You can also adjust the injector pump rate on those I think...best to check with dealer or get a manual first though. Also be sure that your exhaust is not plugged up (mice love to make nests in those) and your airbox is clean too.

NGKs are a good plug, but some of those Ski Doos required a copper core plug. Make sure you are using whatever plug the dealer says to use.

Good luck!



[Log in to Reply]  [No Email]
Bret4207

02-20-2007 05:10:15




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
Thanks guys. A couple questions- What would the mix be? And, I use this on a farm for wood cutting, trapping, etc. I don"t get over 20 mph for more than a few seconds at a time. Never any full throttle stuff, the thing would probably do 75mph anyway, too fast for around here. Am I right in thinking that"ll accelerate the fouling?



[Log in to Reply]  [No Email]
davpal

02-20-2007 10:45:58




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-20-2007 05:10:15  
Putting around on the sled is defenitely not going to help matters. Even though you are only going 20 mph you still have to keep opening the throttle half or all the way to keep dogging around in deep snow. That will keep throwing gas and lots of oil into the cylinder with the injection. You would have to open it up every once in a while to burn out the vapors! That sled in its prime was capable of over 100 mph! Another option would be to get the lowest set of gears for the chaincase that the ski doo dealer has. Gear it like a tractor. You could even unhook the oil injection cable from the throttle and just let it idle. They run about 100-1 at idle and about 20-1 ratio at full throttle. You could let the oil injection do the 100-1 idle thing and just mix some premix in the tank at 50-1. That would clean it up a lot. Only real solution is to have a sled that is more suited to putting around in the woods. That one was more happy on a racetrack. You are using a racehorse for a plowhorse. Later.

[Log in to Reply]  [No Email]
Bret4207

02-20-2007 12:04:41




Report to Moderator
 Re: Way OT- Snowmobile in reply to davpal, 02-20-2007 10:45:58  
I was afraid of that. I was looking for something like my old 12.3 Olympic or my 303 Panther but this was all I could afford and find. I'll have to see what I can do.



[Log in to Reply]  [No Email]
davpal

02-19-2007 23:12:35




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
The sled should have a set of 40 mm mikuni's on it. They are fairly easy to lean out if you want to. You can probably get away with just dropping the main jet down a few sizes. Remove the airbox and now loosen the carbs from the rubber flanges on the motor. They are held by a metal band that has a screw tightening it to the rubber boot. Now you can usually pull the carb right off the motor and you will be able to see the float bowl. You don't have to even unhook the throttle cables. Just take off the bottom plug in the bottom of the carb bowl. It is probably 17 mm wrench to take it off. Now look in the bowl and you should see a jet in there. Take it out with a 1/4 inch socket or nut driver. You should be able to see a number stamped into it. If it is like a 370 you may want to drop down to a 340 to start with to lean it out. Don't go too far because if it gets really cold you could lean it out and blow it up. You want to check the plugs after doing a 100 yard full throttle run. If they are very black and wet you are too rich. If they are whitish to a light gray you are too lean. You want the plugs to be a nice buckskin tan color when the mixture is correct. Replace the bigger jet with the smaller until you get this tan color. You can get jets from dennis kirk on the web or any dealer has them for a few bucks apiece. That should get you started. I have done lots of snowmobile fixing and racing over the years. I changed some jets tonight. Good luck.

[Log in to Reply]  [No Email]
doogdoog

02-19-2007 23:04:07




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
Aloha, Maybe you should try a hotter plug.

Mahalo,
doogdoog



[Log in to Reply]  [No Email]
jhill52

02-19-2007 20:24:35




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
Landlord has given your very good advice. Folow it and majke sure oil pump is workin g correctly first.



[Log in to Reply]  [No Email]
Ron Hart

02-19-2007 19:56:49




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
NGK plugs suck.
Find equevalent AC plugs.
LOL



[Log in to Reply]  [No Email]
Michael Soldan

02-19-2007 17:12:50




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
I agree with 37Chief, mix your oil in your gas and forget the injector oil, see if that solves the problem. The carbs will have a high and low setting on them but better try and find a manual..maybe a dealer near you..if you lean them out too much you can take out your pistons in a hurry BTDT!



[Log in to Reply]  [No Email]
37 chief

02-19-2007 16:23:07




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
If it's fouling plugs like you say it is, you should mix the gas by hand, and forget about the oil injuction system.The oil injuction may be adding too much oil to the gas. My chain saw recomends using the high octain gas, that may work for your engine also . You should also buy the pre mixed oil, then you will not be guessing on the right amount of oil to gas ratio. stan



[Log in to Reply]  [No Email]
landlord7012

02-19-2007 16:16:42




Report to Moderator
 Re: Way OT- Snowmobile in reply to Bret4207, 02-19-2007 15:52:54  
Make sure you have:

Clean fresh fuel, clean air box and unobstructed exhaust. SkiDoo's have that primer button which will chew up plugs if you are over doing it. Also check the adjustment and condition of the oil injection cable (branches off of throttle cable). I have seen cables ride high on the cam lever that actuates the pump thereby allowing excess oil into the intake. The pump is either on the intake side of the crankcase under the carbs or on the pto end of the crank. Plugs are cheap but evetually the rings will stick in the grooves. Two strokes need to be cleaned out at higher revs after warm-up till they run smooth.

You said you weren't aware of oil injection, was someone mixing oil with the gas?

ll

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy