Does anyone know what is the proper way to start up my sled in cold mornings, my sled has no choke, just a primmer. How long should I let it warm up for, and should it smoke like a smoke stack (just on morning start ups) Thank you Crash Dummy.

I used to prime 3-5 times depending how cold. -18 farenheit would be 4-5 times, it would start and then start stalling out, I'd give it another prime, play with the throttle a little, maybe give it half a prime or 1 more full one, play with the throttle again. Sometimes a little more if it had been sitting for a while. Usually let it warm up for approx 5 mins. We usually ride between 20 - 5 farenheit and that is usually 3 primes maybe 4 around the 5 mark.

Cold start, Giver 2-3 primer pumps, if the primer stroke didn't feel like it pumped fuel giver another one. No throttle pull it over (may take 2 or 3) and she'll light off. It'll start on the gas you pumped in and then will try to die as it burns it all up, before it dies givver another shot with the primer.

Warm start, pull it over with the throttle slighty open,

Flooded start ( rolled the sled, parked nose down hill, gave too many primers), hold throttle wide open and rotaxersize until she coughs and sputters and starts to run. Or pull the plugs, rotaxersize, put plugs in and then start.

Cold start, Giver 2-3 primer pumps, if the primer stroke didn't feel like it pumped fuel giver another one. No throttle pull it over (may take 2 or 3) and she'll light off. It'll start on the gas you pumped in and then will try to die as it burns it all up, before it dies givver another shot with the primer.

Warm start, pull it over with the throttle slighty open,

Flooded start ( rolled the sled, parked nose down hill, gave too many primers), hold throttle wide open and rotaxersize until she coughs and sputters and starts to run. Or pull the plugs, rotaxersize, put plugs in and then start.[/b]
Thank's , But what about the masive smoke coming out my excaust, i have had a lot a sleds never seen this much smoke on warm up.(covers the hole floor when i take off out garage), is it normal, This is my first ski doo, smokin better then no smoke i guess. Thank's Crash dummy

does the smoke stop when normal operating temps are reached? without seeing it I would say if so, its normal. check the oil pump setting , keep track of oil used per gallon of fuel to see if its correct.

does the smoke stop when normal operating temps are reached? without seeing it I would say if so, its normal. check the oil pump setting , keep track of oil used per gallon of fuel to see if its correct.[/b]
Yes it does stop smoking when it's warm, just never seen so much smoke coming out excaust, very, very thick smoke. I have 310 pto and 290 mag on main jets, they say i have to make shure i have the right jets in at all differant temps outside, never had to do any jet changing on any of my outher sleds i owned. plugs ran perfect all the time weather it was 40 degree or 20 below, I get differant plug colors on this mxz670 when the wind blows, driving me nuts, Thanks Crash Dummy

i have a 99 mxz h.o. i prime her 4-5 times and pull it maybe 2-3 times and she starts. i just play with the throttle for a minute or two. she also smokes when first started but stops when she warms up. mine is tougher to start on warm starts, as stated above, i give it 1/4 throttle and pull her and she starts right up. it doesnt start very good when priming it when it is warm though, dont know why.

The brand of injection oil you are using could be causing the heavy smoke at idle when cold..Of course this is somewhat normal with any two stroke but it sounds like yours is extreme...I run the bombi mineral oil in my 97 and it doesn't smoke that much..The trick with the primer is knowing if it is actually pumping or not.Sometimes the first pump or two are nothing but air(you can lift the hood and watch the lines to be sure).Once you get used to it you can actually hear and feel when it is pumping gas and then you can be much more accurate in your 3-4 pumps to start her up...If you only prime it say three times and the first two pumps are just air then it will probably only give a sput and that's about it..Once you get it figured out you can start it on the first or second pull every time.

i also have a 98 670 the same as above 2 good hard primes if i give it 3 it floods i give it 2 it starts on first pull then mabe as it starts to die give it a slow prime if you gas it it might die but it smokes heavy till it warms up love the smell of 2 stroke on ya all day sweet

I guess up here in the north we need that extra prime, never had a flooding problem at 3 or 4 primes.

Does anyone know what is the proper way to start up my sled in cold mornings, my sled has no choke, just a primmer. How long should I let it warm up for, and should it smoke like a smoke stack (just on morning start ups) Thank you Crash Dummy.[/b]
I prime 3 or 4 times and then pull I never touch gas And mine smokes until its warmed up starts 1 or 2 pulls like clock work

yeah crash i had 99 670ho and i learned the hard way never to touch the throttle until shes warmed up good. and mine did smoke hard for the first ten mins or so. i squeezed the throttle one morning when she started to bog out, and when she caught again she went to 9000 rpm's instantly. lucky it was on the stand, i hit the kill switch just as she came off the stand. i chased her for 50 feet, but no damage. but it was a learning experience. lol. i just play with the primer till she idles good

yeah crash i had 99 670ho and i learned the hard way never to touch the throttle until shes warmed up good. and mine did smoke hard for the first ten mins or so. i squeezed the throttle one morning when she started to bog out, and when she caught again she went to 9000 rpm's instantly. lucky it was on the stand, i hit the kill switch just as she came off the stand. i chased her for 50 feet, but no damage. but it was a learning experience. lol. i just play with the primer till she idles good[/b]
I guess when you hit the thottle befor you start, it it shuts off my choke, there is no choke butten on my sled,just a primmer, and what ever took inplace of the choke,shuts down, you should only tap the thottle when it's warm,not cold or the choke device will not work rite. thows your carbs off.Crash dummy

I guess when you hit the thottle befor you start, it it shuts off my choke, there is no choke butten on my sled,just a primmer, and what ever took inplace of the choke,shuts down, you should only tap the thottle when it's warm,not cold or the choke device will not work rite. thows your carbs off.Crash dummy[/b]

There is no choke or anything else that acts like one on your sled.
A choke is a butterfly valve that shuts off a percentage of the air entering the carbs.
Thus changing your gas to air ratio to richer in gas, leaner in air.
Older or less sophisticated cars have this type of system.

The older Skidoo sleds have a primer in the form of a plunger or in the case of some even older sleds, a rubber bulb that you squeezed to pump extra gas into the carbs. This type of enrichening system was used on rotary intake valved motors. Once Skidoo switched to reed valves, they too could use the enrichening lever type that had become so popular on the other brands. Many people preferred these as they were less finicky than the primer system and were harder to flood than the primer system.
It works by opening up a plunger that allows extra gas to flow into the back side of the carbs.
There's 2 stages to most of these. You start with the lever flipped all the way over. Once it starts, you flip the lever to the centre position and after about 5 to 10 seconds, you release the lever to the off position. Then let it idle to warm up.

People are split as to which type they prefer. If you know your sled once you get familiar with it, the primer system is easier to get her going. Especially on real cold mornings. That's where the primer seems to really excel. However, if your plugs are fouled a bit, or something is off on your jetting, or heaven forbid, you flood it, then people get frustrated and feel the lever enrichment type is better and if they only had that, then they wouldn't have a problem. LOL.
To each their own.

Now as to why you'd think you had a system as you describe in your quote above;
With your sled, if you touch your throttle (just a little or lots, it doesn't matter) you're opening up the air passage in your carbs which will then try to suck in more air, which will in turn draw more gas up out of your float bowls and your motor isn't ready for that extra air and gas yet. It's too lean a mixture for it to run on when it's cold. When you give it little shots of gas using your primer bulb it only gets more gas. No air. It can handle that until it's warm enough to stay running on both more air and gas. So as mentioned, prime it, which shoots gas only into the back side of your carbs, then turn it over until it starts. Once it does, listen closely for it to start loosing RPM and give it another shot using the primer. Your RPM will increase again. Keep doing this until it keeps running on it's own. Don't touch the throttle until it stays running.

As far as how long to let it warm up. Put your bare hand on the the head. Once it gets evenly warm to the touch, (usually 2 to 3 or 4 minutes) then you can get on it and go. Take it easy for the first few miles. Don't get on it and hammer it or you'll find out what a cold seize is as my son just did. Not a nice thing to have happen. He's got time to tell you while his friends are riding and we're waiting for parts. :( :confused: :bash:

Jeff

There is no choke or anything else that acts like one on your sled.
A choke is a butterfly valve that shuts off a percentage of the air entering the carbs.
Thus changing your gas to air ratio to richer in gas, leaner in air.
Older or less sophisticated cars have this type of system.

The older Skidoo sleds have a primer in the form of a plunger or in the case of some even older sleds, a rubber bulb that you squeezed to pump extra gas into the carbs. This type of enrichening system was used on rotary intake valved motors. Once Skidoo switched to reed valves, they too could use the enrichening lever type that had become so popular on the other brands. Many people preferred these as they were less finicky than the primer system and were harder to flood than the primer system.
It works by opening up a plunger that allows extra gas to flow into the back side of the carbs.
There's 2 stages to most of these. You start with the lever flipped all the way over. Once it starts, you flip the lever to the centre position and after about 5 to 10 seconds, you release the lever to the off position. Then let it idle to warm up.

People are split as to which type they prefer. If you know your sled once you get familiar with it, the primer system is easier to get her going. Especially on real cold mornings. That's where the primer seems to really excel. However, if your plugs are fouled a bit, or something is off on your jetting, or heaven forbid, you flood it, then people get frustrated and feel the lever enrichment type is better and if they only had that, then they wouldn't have a problem. LOL.
To each their own.

Now as to why you'd think you had a system as you describe in your quote above;
With your sled, if you touch your throttle (just a little or lots, it doesn't matter) you're opening up the air passage in your carbs which will then try to suck in more air, which will in turn draw more gas up out of your float bowls and your motor isn't ready for that extra air and gas yet. It's too lean a mixture for it to run on when it's cold. When you give it little shots of gas using your primer bulb it only gets more gas. No air. It can handle that until it's warm enough to stay running on both more air and gas. So as mentioned, prime it, which shoots gas only into the back side of your carbs, then turn it over until it starts. Once it does, listen closely for it to start loosing RPM and give it another shot using the primer. Your RPM will increase again. Keep doing this until it keeps running on it's own. Don't touch the throttle until it stays running.

As far as how long to let it warm up. Put your bare hand on the the head. Once it gets evenly warm to the touch, (usually 2 to 3 or 4 minutes) then you can get on it and go. Take it easy for the first few miles. Don't get on it and hammer it or you'll find out what a cold seize is as my son just did. Not a nice thing to have happen. He's got time to tell you while his friends are riding and we're waiting for parts. :( :confused: :bash:

Jeff[/b]
Trailblazer, That's some good info, I will try that way as soon as i get the nerve to go out side 20/35 below with wind chill (Wisconsin)Thank you Crash dummy

yeah that was an awesome break down of both systems. i think knowing how something works makes it easier to understand why it does what it does, or in this case why it floods when it floods...lol. but what happend to me crash when i touched the throttle that cold morning is that it was really wet the day before, and really cold that morning, when i gave the throttle a shot when the rpm dropped out, i guess my throttle cables, or something in my carbs were frozen, and they stuck with the throttle partly open. my sled had heated carbs and the manual said exactly what trailblazer said. give small shots of primer when your rpm drops, and not use the throttle until the sled warms up a little. but like i said, i had to learn that the hardway, although it could have been alot worse.

Trailblazer, That's some good info, I will try that way as soon as i get the nerve to go out side 20/35 below with wind chill (Wisconsin)Thank you Crash dummy[/b]
Trailblazer, I cold started my sled today and only used my primer(no throtle) to keep it runing i shot it 3 times it fired on 2nd pull it started to die shot it one more, that was all it needed to keep running smoked a cig'' jugs were warm,took off took a couple laps around my track, then opened it up a hard couple. check my plugs and the were running both even tan color for the first time this season. idel was better, befor when i started it, i would allways hit the throtle insted of primer to keep it running,and it would idle to 2000rpm then drop to 1000rpm,this time it went to 2000rpm for few, then it droped to 1700rpm and stayed that way for the first time, normal idle Thanks for that Info,allways going to use the primmer from now on,Thank's Crash Dummy

Ya, Cold seize is nasty. You think your sled is warm, tear off like a raped ape and them SQQUUEEEAk What happened you wonder?? Sled was warm? Well, the sled was warm, but the coolant in the heat exchanger was still COLD. The T stat opens up, engine gets a large gulp of ffreezing coolant and the cyls shrink very rapidly, while the piston is expanded and warm.

I let mine warm up 4-5 min. I usually go out and fire her up, get stable idle, then go inside and finish dressing me and the family. then, easy for the first few min on the trail.

Trailblazer, I cold started my sled today and only used my primer(no throtle) to keep it runing i shot it 3 times it fired on 2nd pull it started to die shot it one more, that was all it needed to keep running smoked a cig'' jugs were warm,took off took a couple laps around my track, then opened it up a hard couple. check my plugs and the were running both even tan color for the first time this season. idel was better, befor when i started it, i would allways hit the throtle insted of primer to keep it running,and it would idle to 2000rpm then drop to 1000rpm,this time it went to 2000rpm for few, then it droped to 1700rpm and stayed that way for the first time, normal idle Thanks for that Info,allways going to use the primmer from now on,Thank's Crash Dummy[/b]

Your welcome Crash.
And thank you for the feed back. I'm glad it worked for you.
Once we understand how things work, it's usually easier to get it to work better.

Jeff

and on the smoke thing I wouldnt worry..my 500 smokes exactly like you say when it starts but after I start riding it its gone for the rest of the day...just normal 2 stroke smoke after all warm. :thumbsup: I had to learn the hard way on my STX 583 too,now I start that just like said above..never touch the gas till she is ready,I just have to keep my friend away from it while its trying to warm up LOL my buddy has this thing when the sled starts he likes to start playing with the throttle.. :cussing: last time he did that to my sled I sat there changing plugs while he rode off on his sled :bash: :crazy: