Power hesitation at half throttle

GRMSJ · Aug 21, 2014

At roughly 60 mph, my 06 Scrambler experiences sudden power loss and hesitation. Lots of sputtering, and I've throttled through it getting up to 70+mph, at which point everything returns to normal. Even at lower speeds, accelerating hard, this occurs as well, I'd say a little over half throttle.

I've read up on similar discussions here and tried a few of the suggestions with no success. Checking for loose terminals, carb vents, fuses, and so forth.

It happens at such a precise moment, that I'm wondering if its electrical? I outfitted an ATV ignition switch to it months ago, thats about the only drastic change, but all my indicators work. Just grabbing at straws but a few weeks ago i switched to premium gas, and i was originally running 87... ?

manray · Aug 21, 2014

Half throttle would mean your main jets could be clogged.

swestenzweig · Aug 21, 2014

I'd agree with manray. Start by adding some Sea Foam to the tank and see if that clears things up a bit. You may still benefit from pulling the carbs off and cleaning them, but the Sea Foam may be enough for now.

GRMSJ · Aug 29, 2014

Thanks for the input guys. I ran some seafoam through there and it helped for about a day. Then back to sputtering. I pulled the carbs and everything looked ok. Jets were fine, float levels, diaphrams, no noticeable issues. Cleaned the jets regardless. Aaaaand it still runs like garbage.

My plugs were looking a little grody so I threw in a new set I had laying around. Still runs poorly. No idea where to go from here.

endoscopy · Aug 29, 2014

Power hesitation

Mr. GRMSJ,

Have you checked for water in the tank, or have you ever cleaned the petcock standpipes?

Namaste,
Charles

GRMSJ · Aug 29, 2014

endoscopy said:
Mr. GRMSJ,

Have you checked for water in the tank, or have you ever cleaned the petcock standpipes?

Namaste,
Charles

I havent. I think that was going to be my next course of action. Drain the tank and inspect the petcock.

Power hesitation at half throttle

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