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#2963669 - 10/01/12 08:57 AM Intermittent issue -
ferg
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16 Point


Registered: 07/29/04
Posts: 15427
Loc: At the TNDeer shirt factory %^...

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The worst kind -

Can-am Outlander - 400 -

Runs and runs - then, it 'acts' like it's fuel starved - and stops - if I give it full choke it will fire back up and try to run - but not with throttle - unless feathered -

It's like there is something plugging up the fuel -

I've drained the tank and blew compressed air from the fill cap out the reserve tank fuel line. ( I cut it at the tank )

Installed a filter and ran for about a mile or so and it started doing it again -

Sort of taking the tanks out and really cleaning out -

any suggestions ????

ferg....
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#2963698 - 10/01/12 09:12 AM Re: Intermittent issue - [Re: ferg]
Kimber45 Moderator
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Registered: 07/10/08
Posts: 17520
Loc: Close to Jackson, TN

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Could be SO many things.. Some trash in the carb possible..

I bought a 300 Honda last year for a STEAL because the guy had put 3 carbs on it and it was doing pretty much what you described.. I took it home and started thinking about simple things I could try - 1st shot was - remove the breather lid and ride it a while to see if it still starves and sputters which it did not. I rode it for 30 minutes and it would take full-throttle the entire time. Started considering the "why's" and ended up pulling the air hose that runs up from the breather box to see if there was anything in it......Walla! It had a dirt dobber nest rolling around in it and it would actually restrict the air flow enough at times that it would choke it down when you hit the throttle \:\)
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#2963709 - 10/01/12 09:17 AM Re: Intermittent issue - [Re: Kimber45]
Kimber45 Moderator
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Registered: 07/10/08
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If there nothing blocking the air-flow I'd pull the carb or at least the bowl off the carb and inspect, pull and clean jets - needle & seat etc with carb cleaner.

Also, grab a can of Sea-Foam - pour an ounce or 2 in the tank - ride it around the yard 5-minutes - park it and let it idle for 20 minutes. Sometimes its as simple as letting it clean itself out at idle. Additive will often do a better job of cleaning during idle.
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#2963824 - 10/01/12 10:31 AM Re: Intermittent issue - [Re: Kimber45]
ferg
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Registered: 07/29/04
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Thank you sir - I cleaned the air filter/housing etc, but didn't look a the hose - and easy check \:\)
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#2963877 - 10/01/12 11:08 AM Re: Intermittent issue - [Re: ferg]
Kimber45 Moderator
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Registered: 07/10/08
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Loc: Close to Jackson, TN

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 Originally Posted By: ferg
Thank you sir - I cleaned the air filter/housing etc, but didn't look a the hose - and easy check \:\)



The 300 I bought had a rebuilt motor and 3 carbs with it \:\)

The guy never thought about air-flow situation - just kept buying carbs \:\) It's REAL easy to run it with the breather cover off to see if it acts the same and obviously to check the hose/tube.

If I were a bettin man I'd bet some heavy duty cleaner in the gas and letting the engine idle for a 20 minutes would help it too. That good ole ethanol sure does build up in those carbs \:\(
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#2963952 - 10/01/12 11:40 AM Re: Intermittent issue - [Re: Kimber45]
ferg
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Registered: 07/29/04
Posts: 15427
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The 'thing' that makes me think carb issue - is when it does stop - if I fully choke (manual) it will start and I can run some if I play with the choke (using mostly fully engaged) would that make it more of a fuel delivery issue than air ?

When it starts to act up - i can choke it and it will run' better', and I can limp it home sometimes with it choked up a good bit - restricting the air and pushing more fuel -

Just thinking out loud here .....
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#2964045 - 10/01/12 12:40 PM Re: Intermittent issue - [Re: ferg]
Kimber45 Moderator
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Registered: 07/10/08
Posts: 17520
Loc: Close to Jackson, TN

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 Originally Posted By: ferg
The 'thing' that makes me think carb issue - is when it does stop - if I fully choke (manual) it will start and I can run some if I play with the choke (using mostly fully engaged) would that make it more of a fuel delivery issue than air ?

When it starts to act up - i can choke it and it will run' better', and I can limp it home sometimes with it choked up a good bit - restricting the air and pushing more fuel -

Just thinking out loud here .....


Before I took the carb apart - I'd drain the gas down to less than a 1/4 tank and add an ounce or so of sea foam cleaner.. Slosh it around pretty good and pull the choke etc to keep it running a few minutes.. You may be surprised and might get by without pulling the carb, or at least dropping the bowl.
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#2964054 - 10/01/12 12:49 PM Re: Intermittent issue - [Re: Kimber45]
ferg
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Registered: 07/29/04
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Loc: At the TNDeer shirt factory %^...

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Will to Scott - thanks \:\)
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'It's time to pee on the fire and call in the dogs boys!'

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#2964986 - 10/01/12 09:49 PM Re: Intermittent issue - [Re: Kimber45]
big 8's in Weakley county
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Registered: 12/07/01
Posts: 14638
Loc: south fulton

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 Originally Posted By: Kimber45
If there nothing blocking the air-flow I'd pull the carb or at least the bowl off the carb and inspect, pull and clean jets - needle & seat etc with carb cleaner.

Also, grab a can of Sea-Foam - pour an ounce or 2 in the tank - ride it around the yard 5-minutes - park it and let it idle for 20 minutes. Sometimes its as simple as letting it clean itself out at idle. Additive will often do a better job of cleaning during idle.


Had the same thing happen to my rancher dirt dobbers got in the air vent up by the gas tank and it would barely run
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#2978660 - 10/12/12 10:13 AM Re: Intermittent issue - [Re: big 8's in Weakley county]
Unicam Administrator
Grumpaw
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Registered: 12/13/00
Posts: 19207
Loc: Dallas, GA. & Cookeville, TN

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If all the air passages are clear check the float, needle and seat on the carb. Take it down right after it dies and see if the float has fuel in it.
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#2980518 - 10/14/12 04:42 AM Re: Intermittent issue - [Re: Unicam]
Tn_River_Ratt
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Registered: 07/18/11
Posts: 216
Loc: Hardeman, Tn

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Check your fuel line. The alcohol in the fuel these days sometimes makes the line come apart inside causing an intermitent lean/no fuel condition.
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#2980589 - 10/14/12 07:36 AM Re: Intermittent issue - [Re: Tn_River_Ratt]
FULLDRAWXX75
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Registered: 01/29/07
Posts: 6222
Loc: Adirondack Mtns, NY

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Ferg,

I did a little checking on this machine. When was the last time the valves where adj. and it had a full tune up?

I am reading that the cam chain tensioners are common failure points on this machine, causing the valves to become out of adj. (too tight) and also causing the cam timing to be off. Both will cause the same exact problems you are discribing here. Manual recommends valve adj. every 16 hrs of riding.

FDXX75
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