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1989 Ski-Doo Formula MX
- Getting Very Frustrated
started by WisconsinRider
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January 28th 2009 at 4:44 PM
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WisconsinRider
New Member
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61 Posts 
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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I have a 1989 Ski-Doo Formula MX 462 Rotax that just don't want to run for me!! I bought it about 2 weeks ago with not a problem i mean ran great the whole deal!! and the next day after we brought it home it wouldn't run any more!! we've got it to run once in 2 weeks!! i put new spark plugs in it, new air filter, filled the gas tank, filled anti-freeze, 3/4 full of oil and the thing just don't want to run! we pulled the carbs off and they are clean as a whistle!! So could ya help me out?? thanks
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 28th 2009 at 6:11 PM
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Do you have spark?
What is the compression?
Are the plugs wet?
Did you actually pull the carbs apart, or did you just take them off?
Fix it till its broke!
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January 28th 2009 at 6:14 PM
[ Modified January 28th 2009 at 6:18 PM
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AKnarrowback
We have all received a bail out. Jesus paid our debt 2000 years ago.
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867 Posts 
Group: Members
Member Since: October 1st 2006
Location: Fairbanks, Alaska, USA
Current Sled: 96 xlt rmk/sks
2008-2009 Miles: 16
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Are you having trouble getting to start?
Are you familiar with how the primer works? People not used to a primer, sometimes, have problems with them at first.
Three shots, pull till it fires, tap the gas lever for a second then give small half shots on the primer when the engine starts to die out. Half shots with a touch on the throttle right after will keep the engine going till it warms up.
Primers aren't like chokes. You need to feed a little extra fuel when the motor starts to die off. Sometimes the primer shot can add too much, so tap the throttle a hair to lean things out. You need to stay with the sled for the first minute or two until the motor is warm enough to maintain an idle on it's own.
It sounds like you bought it warmed up and rode it the first day, then had to do a cold start the next. If you prime three times and the motor starts then dies off right away do not prime three times again. If it is warm enough the intitial prime can flood the motor.
It takes practice.
96 xlt sks/rmk. custom 5.5 inch riser on the bars, custom air intake, custom front shock mounts, custom oil feed channel in block to inner pto end bearing, primer (I hate chokes), custom = I made it myself
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January 28th 2009 at 7:44 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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AKnarrowback:
Ya i'd say it takes some gettin use to i flood er' quite a bit!! alright will try cause i've been just priming it 3 times then pulled tell i couldn't pull any more then let it sit then pulled it again!! but i'll try er!!
TeamNFG:
I do have spark and i do have compression. the plugs are wet cause i flooded it!!
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 28th 2009 at 7:50 PM
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polaris91
117 racing
polaris91 ugh.
Updated Tuesday at 8:30 PM
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3647 Posts 
Group: Members
Member Since: March 9th 2006
Location: bridgeport, new york, USA
Current Sled: 1991 indymod/2005 xcsp600
2008-2009 Miles: 2900
2009-2010 Miles: grass!?
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if you flood the engine all you have to do is hold the throttle wide open (with your hand!)and then pull until it fires up mud make sure you let go of the throttle when it starts so it dosent take off
1990 indy trail bored.20over, ported and polished, cluched and geared, chaincase/brakes/jackshaft from 93 xlt, headlight cover, teather, some custom painting, black skid plate, blue running board trim, fox shocks, blue/gray powermadd handguards, 2 in powermadd riser, fly bars/barpad,blue leds(underglow),1 in lug track, teather mount from a 96xcr440,blue guage bulbs, blue c&as, xtra 10 rear, and edge seat and tank.
2005 xcsp 600,chrome windy,stripped decals,3.5 inch rox riser,white powermadd handguards,white c&a ultra 3 skis 6in shapers,camoplast cobra,slp can,fly bars/barpad,xeon headlight bulbs,rsi barhooks,odi grips,light blue clutch spring,slp vents,black headlight cover,billet wheels,rydefx clicker,
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January 28th 2009 at 7:57 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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doesn't pull that easy!! my dad can't even hold the throttle and pull it. had my buddy thats strong as an ox 220 pounds try and he couldn't (i'm only 15 y/o 5'1 and 103 pounds)
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 28th 2009 at 7:58 PM
[ Modified January 28th 2009 at 8:04 PM
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Yes like said above
Turn your fuel off
Hold wide open
and start puling your guts out (its better if you have help, to take turns)
Once it starts to clean up, turn your fuel back on.
With a primer, you should only need 3 squirts for the first time you start it that day, after that, just pull and it should fire.
If your sled floods when you are not running it, you will need to clean your carbs, there is a peice of crap in the seat of the fuel valve (that means you have to dismantle the carbs and clean them)
Good luck
EDIT********
I just read your next post
It sounds like you are hydralic locked STOP!!!!! you can bend a rod.
Pull the plugs and with the fuel off and the kill switch off, pull it over untill the fuel mist clears up.
Reinstall plugs and try then to get it running (keeping in mind its still flooded).
And I would clean (the inside) of your carbs, when the fuel valve has crap in it, the fuel will leak directly into your engine.....hydralicly locking the engine
Fix it till its broke!
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January 28th 2009 at 8:01 PM
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zwildone
Starting Member
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26 Posts
Group: Members
Member Since: November 22nd 2008
Location: wallaceburg, ontario, Canada
Current Sled: 1995 mach z 780
2008-2009 Miles: 1300
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my grandfather taught me this trick...get a small plumbers torch,pull plugs out and heat the tips and threads until you feel the heat coming thru the insulators on your fingers,i mean heat not just a faint warm,keep turning plugs as you heat them then install them as you heat them,2 full primes and feather the throttle as the head warms up,Remember this is from a cold start.keep me informed if this helped.After you have running,enjoy it but do not keep doing this,this is just a quick start for you to enjoy the sled,the priming is for you to learn
If you haven't broke it,You aint riding it!!!
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January 28th 2009 at 11:16 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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well i went out at about 8:00 (bout when we were all posting this) and primed it 3 times and she fired right off first pull!! got er' running good 5 minutes and she slowly died (for got to keep priming it and she probably wasn't warmed up) then right after she died i grabbed the cord pulled er' and she fired back up again and so i shut er' off then 2 hours later went back out primed it 2 times pulled er' and first pull she fired right off again so i guess its working but this whole week end she's been in a 70 degree warm shed and she's stil in that shed but the shed is like 20 degreese right now cause it hasn't been heated since sunday!! idk if that makes a difference or not!! and it takes 2 people to open the big door so i couldn't actually ride er' but hopefully she'll just run fine now!! thanks guys!
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 29th 2009 at 3:18 PM
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AKnarrowback
We have all received a bail out. Jesus paid our debt 2000 years ago.
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867 Posts
Group: Members
Member Since: October 1st 2006
Location: Fairbanks, Alaska, USA
Current Sled: 96 xlt rmk/sks
2008-2009 Miles: 16
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So you know the sled runs. That isolates a lot of the possible problems.
Now you have to try using the primer in the cold. Prime 3X, start, be ready to give another half or full shot within five seconds. Stay with the sled giving small shots till she idles on her own. Be ready to tap the thottle if you give a full shot and the motor tries to die out.
Practice, practice.....
Good luck.
96 xlt sks/rmk. custom 5.5 inch riser on the bars, custom air intake, custom front shock mounts, custom oil feed channel in block to inner pto end bearing, primer (I hate chokes), custom = I made it myself
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January 29th 2009 at 10:10 PM
[ Modified January 29th 2009 at 10:14 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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well i started her again last night at 10:30 so i tried her again today after school at around 4:30 and she started right off again and i reved it twice and it idled for like 3 miutes before i had to rev again so thats pretty good and the shed said on the temp gauge 10 degreese!!
Question:
so if i ride it to school at 7:30 in the morning and get out of school at 3:16 in the afternoon would i have to prime it at 3:16 when i get out of school??? and if i do have to prime it how many times???
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 29th 2009 at 10:17 PM
[ Modified January 29th 2009 at 10:50 PM
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AKnarrowback
We have all received a bail out. Jesus paid our debt 2000 years ago.
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867 Posts
Group: Members
Member Since: October 1st 2006
Location: Fairbanks, Alaska, USA
Current Sled: 96 xlt rmk/sks
2008-2009 Miles: 16
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Yes.
If the motor has time to cool down then you have to prime it three times again. Sometimes if it is half cooled down one prime is good enough. If the motor is still warm then you shouldn't need to prime it at all.
You'll get the hang of it.
3:16...... That's my favorite number.
John 3:16
96 xlt sks/rmk. custom 5.5 inch riser on the bars, custom air intake, custom front shock mounts, custom oil feed channel in block to inner pto end bearing, primer (I hate chokes), custom = I made it myself
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January 29th 2009 at 10:21 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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alright thanks
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 29th 2009 at 10:56 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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i found out (cause we were priming it 3 times before i asked) and it was the gas!! i put in gas from like all the way last winter into it and thats what caused it not to run so i drained out all that old gas and put new in and now she runs like a champ!!
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 30th 2009 at 8:00 AM
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ryan8u
Starting Member
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16 Posts
Group: Members
Member Since: January 28th 2009
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just a quick question my primer needs one pump to prime it self secon pump i feel fuel in primer can you feel fuel in primer if not seller probally manuel primed with either warmed it up and u bought it warm universal primers are only like 15 dollars dont use starting fluid as a permenant repair a quick shot just to test shouldnt hurt though
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January 30th 2009 at 2:02 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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ya i can feel the surge when i prime it!!
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 30th 2009 at 2:04 PM
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slednut55
wanna race?
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685 Posts
Group: Members
Member Since: November 6th 2007
Location: Emerald, WI, USA
Current Sled: 96' mxz, 91' mach 1 xtc
2008-2009 Miles: 2300
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dont ever use starting fluid on a 2-stroke
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January 30th 2009 at 2:14 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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alright thanks
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 30th 2009 at 3:20 PM
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AKnarrowback
We have all received a bail out. Jesus paid our debt 2000 years ago.
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867 Posts
Group: Members
Member Since: October 1st 2006
Location: Fairbanks, Alaska, USA
Current Sled: 96 xlt rmk/sks
2008-2009 Miles: 16
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If you need to use starting fluid then something is wrong and needs to be corrected.
Starting fluid is a last resort measure. It's like lighting dynamite off in the cylinder.
96 xlt sks/rmk. custom 5.5 inch riser on the bars, custom air intake, custom front shock mounts, custom oil feed channel in block to inner pto end bearing, primer (I hate chokes), custom = I made it myself
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January 30th 2009 at 3:46 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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wow i didn't know that
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 30th 2009 at 5:57 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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its not running again!! My dad last week end took that compartment off with the air filter and what not and i noticed when i started it wednesday night i had the gas off!! then turned it on yesterday and started it and workd great and every thing was normal now i go in the shed today and theres a huge puddle of gas all over the floor!! 1/4 of a tank of gas on the floor!! and i primed er' 3 times and pulled to i was almost throwing up and she wouldn't even turn over
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 30th 2009 at 6:27 PM
[ Modified January 30th 2009 at 6:28 PM
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Quote originally posted by WisconsinRider
its not running again!! My dad last week end took that compartment off with the air filter and what not and i noticed when i started it wednesday night i had the gas off!! then turned it on yesterday and started it and workd great and every thing was normal now i go in the shed today and theres a huge puddle of gas all over the floor!! 1/4 of a tank of gas on the floor!! and i primed er' 3 times and pulled to i was almost throwing up and she wouldn't even turn over
Quote originally posted by TeamNFG
Yes like said above
Turn your fuel off
Hold wide open
and start puling your guts out (its better if you have help, to take turns)
Once it starts to clean up, turn your fuel back on.
With a primer, you should only need 3 squirts for the first time you start it that day, after that, just pull and it should fire.
If your sled floods when you are not running it, you will need to clean your carbs, there is a peice of crap in the seat of the fuel valve (that means you have to dismantle the carbs and clean them)
Good luck
EDIT********
I just read your next post
It sounds like you are hydralic locked STOP!!!!! you can bend a rod.
Pull the plugs and with the fuel off and the kill switch off, pull it over untill the fuel mist clears up.
Reinstall plugs and try then to get it running (keeping in mind its still flooded).
And I would clean (the inside) of your carbs, when the fuel valve has crap in it, the fuel will leak directly into your engine.....hydralicly locking the engine
Yep, what he said!
Fix it till its broke!
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January 30th 2009 at 7:19 PM
[ Modified January 30th 2009 at 7:22 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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k will try
well i just told my dad to do that and my dad said we've done that a few times before and it didn't work!! idk i posted on craigslist asking to trade it in and pay like $100 to get one that runs!!
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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January 31st 2009 at 11:19 AM
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stormrider62033
wally
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4729 Posts
Group: Members
Member Since: December 25th 2004
Location: Gillespie, IL, USA
Current Sled: 99xcr 800
2008-2009 Miles: 500
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LOL once again the ole bashing ,dont use ether been using it for 25 years and havent blowed any thing up yet ,when you use ether ,just a little squit does the trick ,most people hose it like its on fire
mid Il alway's waiting for snow,moving north(way north)2001 thundercat 99xcr 800 97SPX ULTRA 96 zrt 600&800,92 doo plusX 92 v max 4 750
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January 31st 2009 at 5:11 PM
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WisconsinRider
New Member
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61 Posts
Group: Members
Member Since: December 27th 2008
Location: Downing, Wisconsin, USA
Current Sled: 1984 Polaris 440
2008-2009 Miles: 120
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well me and my dad looked at er' and theres black stuff coming out where the spark plugs go in and my dad was saying something like that usually only happens when the cylinder is blown!! and now i have no spark!! ran perfect for 2 days than the 3rd day i have no spark
My sleds:
1984 Polaris 440
1972 Ski-Doo Elan 250 (does not run)
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