2001 MXZ 700---NO START

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skidoodoug

Member
Here's my situation. Please keep in mind that I have never pulled more than 6 times to get it started no matter what time of year.

Spring "summerization"...Added Seafoam to fuel, run for 5-10 minutes, siphon as much fuel out as possible.

This weekend...Add fuel. Only had about a half gallon or so. No start after several attempts. A little fuel down the cylinders produced a pop. Pulled several more times, no start. Plugs really wet.
Thought maybe needed more fuel in the tank. Only had about another 1/2 gallon of premix. In it went. No start. Plugs wet with hint of red to them from the premix?
Went for more gas. Added about 2 gallons. Pulled several times, no start. Fired only with fuel down cylinders.
I was baffled, but really more exhausted than anything, so I started taking things off. After removing muffler, I noticed some oil coming out of it. Maybe a cup or so. Hmmm, probably not a good thing.
What the heck, more fuel down the cylinders. Ran for a few seconds bellowing smoke and spraying oil out the exhaust. Even after the motor quit, oil was draining out the Y pipe.
This is when I came in and got on John Dee.
||The only things I have done differently this season compared to all the others is 1. Switched oil brand at beginning of last season. 2. Added Seafoam for the first time.and 3. Did not start it at all during summer months.
Any ideas.

Thanks
 
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mjkaliszak

New member
Seafoam is a REAL good decarberizer. Could you have mixed too much in and during your final run last season it just set in motor & the pipe ? Now you have excess fuel passing mixed with a Seafoam coating from last season ? That would produce these effects. I use Seafoam when I sink 1 of my jetski's in the lake and water lock it up. It saves the day but during the fogging/heating up the motor process it smokes out my neighbor hood and spits black carbon deposits out the pump exhaust. It sounds like you need to start with fresh everything ( gas & plugs ) and keep it running. Dump fuel right down the holes , make sure your carbs are not stuck open due to sticky floats or something. It almost sounds like it was fogged with Seafoam. Hope that helps, I used to have a T-Cat from the early 90's and every year it was a pain to get going. When i put SF in my gas I only use a little.
 
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mjkaliszak

New member
Also sounds like your starved for fuel from your tank , pulse line , fuel pump, something like that complicating your issue. LEAKING OIL COULD BE UNBURNT fuel & carbon deposits mix from the plug hole dump.
 
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skidoo50

New member
Sounds to me like needle is stuck in the seat.Since it does fire when you put gas in each cylinder. Try tapping on the float bowls with the handle side of a screwdriver.
 
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dab102999

New member
Could be a lot of things but basically you only need 3 things, spark, compression, fuel. You ain't gettin one of them and I would suppose fuel. Even though I fog and sea foam every year I still pull the bowls at the start of the season and clean before I try and start a sled.
 
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dab102999

New member
Went back and read the main post one more time, did it pull hard?? The reason I say is a lot of smoke, and not stoppin could be a bad oil pump. Was your oil tank empty?? If so could have all your oil in the bottom of you case. I doubt that is it but if so do not start. Motor will hydraulic and granade big time.
 
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toddspolaris

Member
carbs are sitting with old fuel in them. drain carbs and start over. seafoam or not, todays fuels just are NO good, they won't hold their octane and low octane fuel doesn't like to fire well.
 
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skidoodoug

Member
You are exactly right longtrack. Yesterday, took the carbs off and cleaned floatbowls and jets. Surprisingly clean to begin with. Fresh fuel and some (alot) of starting fluid and got it ruuning.
Started on 2nd pull today.
Thanks to everyone for their responses.
 
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