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Engine will not rev

Engine runs but struggles to rev.

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When engine is running the clutch will not turn. What could the problem be?

Sounds silly but have to activated the chainbrake by accident.? The black handguard by the top handle is the chainbrake.! Pull it back to de-activate the safety chain brake. It works by activating a brake band around the clutch drum, stopping the drive but the engine still runs, however if you try and rev it the engine will struggle under load because the clutch is trying to drive a drum which is being held by the brake.

Jan 07, 2016 | Poulan 14 Woodshark Chainsaw

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Hayter jubilee 43

Sounds like the fuel system need to be cleaned out. I woudkl also check for grass clogs and a sharp blade.

Sep 07, 2014 | Garden

1 Answer

Fiesta revs struggling

ive seen transmissions cause this in high-end luxery cars... but that being said..

-sounds like your fuel filter is clogged. (i just shake mine out and run carb cleaner in it, which i do every 15,000 miles)
-could also be fuel pump
-loose battery terminal
-bad alternator
-clogged MAF sensor

Jul 04, 2013 | Cars & Trucks

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Can you give me some more information? Does it run fine if you do not apply the brakes? This could be a failing brake booster and you are loosing vacuum when the brakes are applied....

Jun 14, 2010 | 2001 BMW 3 Series

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Truck won't stay running

so your saying when it is ideling after you start it, it struggles to stay running, if so you may just need a minor tweak on the throttle body theres a little mechanism that the throttle cable attaches to, this is the thing that opens the butterfly valve which lets more air into your engine which is how you accelerate on that little mechanism is an adjustment screw that heightens or lowers your revs when its ideling start your car and adjust the screw till your engine runs and sounds right

Oct 09, 2009 | 1997 Dodge Dakota

1 Answer

I have a mountfield classic 35. It struggles to run smoothly until it is almost out of fuel. The plug gets very oily. If the mower is tipped backwards the fuel flow is restricted and the mower runs well....

replace the carby diaphram between the tank and carby that will fix it (diaphram controls the fuel pump and when faulty can make engine rich or lean with revs impossible to control)

Jul 13, 2009 | Garden

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