2001 mxz running on 1 Cyl - Snowmobile Forum: Your #1 Snowmobile Forum

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post #1 of 16 (permalink) Old 01-09-2017, 10:54 AM Thread Starter
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2001 mxz running on 1 Cyl

Ran my sled for the last 2 wknds and ran great. Stopped for a quick check of my map and the sled idle down and ran on 1 cyl only. shut it down and fired it back up, ran on 2 for 5 sec's then back to running on 1. drove it back like that on 1 and let it site for 15 mins. fired it again and ran on 2 for 5 sec's then back to 1. any suggestions would b great.

thanks
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post #2 of 16 (permalink) Old 01-10-2017, 12:01 PM
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Whe did you change plugs last?

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post #3 of 16 (permalink) Old 01-10-2017, 12:03 PM Thread Starter
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last year when it was serviced
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post #4 of 16 (permalink) Old 01-10-2017, 12:05 PM
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Try another set first, then check that the wire end caps are tight on the cables.

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post #5 of 16 (permalink) Old 01-10-2017, 12:07 PM Thread Starter
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wires and plugs are ok as i'm getting a spark out of both plugs. gonna clean the carbs and check the teather cord this wknd.
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post #6 of 16 (permalink) Old 01-10-2017, 02:10 PM
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Maybe one of your cylinders has bad rings? My 09 MXZ 600 broke a ring last week and only read 30 psi when we tested it, the plug sparked but did not fire whatsoever


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post #7 of 16 (permalink) Old 01-10-2017, 02:13 PM Thread Starter
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its strange because it does run on 2 when it first fire's up then drops to 1. if one of the cyl's is pooched i don't think i'd be able to pull it over let alone start it?
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post #8 of 16 (permalink) Old 01-10-2017, 02:19 PM
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Everything still turned over on mine, considering it was the top end. If it was the bottom end, (crank) everything would cease


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post #9 of 16 (permalink) Old 01-10-2017, 02:21 PM Thread Starter
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thanks for the info Kuntze
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post #10 of 16 (permalink) Old 01-10-2017, 02:24 PM
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Yeah no problem, I bought mine in November from a dealership and they finally agreed to cover the labor since I barely ran it this winter. Sucks not having a sled to ride! Hope you figure it out at low cost!


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post #11 of 16 (permalink) Old 01-10-2017, 02:26 PM Thread Starter
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funny when i bought it 8 years ago i took it in for a service after my first winter with it and there was a factory recall on both pistons......
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post #12 of 16 (permalink) Old 01-10-2017, 02:30 PM
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Did they replace them for free? I was looking at an 06 Polaris fusion until I heard about the common motor problems and recalls. I believe if you have the VIN #, the dealerships can search any sled to see if it had any recalls and if they were fixed and by who


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post #13 of 16 (permalink) Old 01-10-2017, 02:43 PM Thread Starter
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ya they fixed it for free and did the antifreeze reso. done at Snow Shitty Cycle
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post #14 of 16 (permalink) Old 01-10-2017, 07:54 PM
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Maybe you picked up a piece of debris and it plugged the orifice in the carb? it allows enough fuel to start but runs dry after its started? just a thought. it does sound fuel related.

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post #15 of 16 (permalink) Old 01-11-2017, 05:08 AM
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ice can do that as well.

But, chances are it is just bad spark plugs. Yes, NGK plugs are notorious for it. They can run fine at idle and crap when you give it power or vise-versa. There is no solution other than carry extra plugs.

I found the BR9EYA don't foul as often and have been running them instead of BR9ES. These plugs are identical except the EYA's have a groove in the anode to help prevent fouling.

If it isn't the spark plugs, then try this, change the plug wires from left to right and right to left. Don't worry, both plugs fire at the same time anyway, it will run fine. If the same cylinder drops, then you probably have a compression issue. If the opposite cylinder drops, then you know it is ignition.

Since the 2001 uses a single coil to fire both spark plugs, the next thing to look at is the plug wires. You can unscrew the the plug caps from the wire and then clip back about 1/8" and screw the cap back on. I usually use a little WD-40 or a dry lube to help out.

Be sure to inspect the cap for issues before you put it back on. The screw and the contacts are one piece. Meaning, they should move together. If they don't, they are broken. Which I've seen more than a few times.

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post #16 of 16 (permalink) Old 01-11-2017, 07:26 AM Thread Starter
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thanks Bearak
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