'96 Cougar running on 1 cylinder? - ArcticChat.com - Arctic Cat Forum

 
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post #1 of 7 Old 02-23-2012, 05:35 AM Thread Starter
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'96 Cougar running on 1 cylinder?

I've been trying to diagnose some odd characteristics on the wife's sled, but now it seems to be idling on just one cylinder? I can pull the plug wire for the clutch side of the engine and it doesn't idle any differently. I did check for spark, which seems to be good (bright blue), compression is great (high 120s on both cylinders) so I went through the carbs and gave them a thorough cleaning. The bowls fill as they should and I am pretty confident that the passages are all clear in both carbs. I did clip 1/4" off the plug wire on the bad cylinder but that didn't seem to make much difference. The carbs appear to be timed very well and I have them adjusted for the same gap at idle.

I'm pretty confident in which cylinder it is because I can pull the clutch side plug wire and it will start/run on the first pull if 'warm'. Replace that plug wire and pull the stator side plug wire and it won't even pop no matter how many times you pull regardless of the choke position.
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post #2 of 7 Old 02-23-2012, 10:54 AM
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Put the mag side plug wire to the clutch side plug and the clutch side plug wire to the mag side plug and see if the problem moves to the other side. If it does the coil is likely bad.

If it doesn't move to the other side, then pull the plugs and put them in opposite cylinders and try it. If the problem moves then, it is the plug.

If neither of these results in the problem moving, then do compression check of the engine.

Last thing is pull the pipe and look in the cylinders at the pistons to see if one piston skirt is broken.
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post #3 of 7 Old 02-23-2012, 12:06 PM
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^^^^^^^^^^ thats exactly what i would do first. if that doesnt change anything take a look at your reeds in that cylinder. i had reeds go out on my boat last year and it had a similar problem. when you take the reed cage off hold it towards the sun or a light and look to see if you have any spaces between the petals and the cage. a little bit is ok but if its to much i could be flooding out your cylinder. hope my 2 cents help
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post #4 of 7 Old 02-23-2012, 02:19 PM
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post #5 of 7 Old 02-23-2012, 03:07 PM Thread Starter
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Quote:
Originally Posted by 109jb View Post
Put the mag side plug wire to the clutch side plug and the clutch side plug wire to the mag side plug and see if the problem moves to the other side. If it does the coil is likely bad.

If it doesn't move to the other side, then pull the plugs and put them in opposite cylinders and try it. If the problem moves then, it is the plug.

If neither of these results in the problem moving, then do compression check of the engine.

Last thing is pull the pipe and look in the cylinders at the pistons to see if one piston skirt is broken.
Thanks for the ideas, I'll give them a shot this afternoon.
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post #6 of 7 Old 02-23-2012, 06:27 PM Thread Starter
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Well it followed the plug. A new pair of BR9EYA's and its running like a whole new machine...now I just need to convince a storm or two to come my way so the wife can actually put some miles on it.

Thanks!!!
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post #7 of 7 Old 02-24-2012, 07:40 AM
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I believe the 96 Cougar is going to be a piston port engine, hence no reed valves.
my bad iv been working on to many reed motors, its been a while since i ahve worked on a PP, thanks for correcting me i hate giving out bad info

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