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Mountfield 46R PD Mower - Engine hunts?

I have a Mountfield 46R PD petrol lawnmower - two years old.
Engine has started hunting / chugging and won't run at high speed.
I've changed the spark plug - no change.
Seems to be running rich - plug sooted up.
I've checked air intake - all ok.

Any ideas?

EurIng, May 2010

home Fix label Garden Tools label_important Lawn Mowers category Mountfielddone

Replace the carburettor diaphragm. 20 mins and £2.

phil_saunders(a)bigfoot.com

Phil Saunders, May 2010

carb needs cleaned out or new air filter

paul, May 2010

If you have a mixture adjustment screw on the side of your carb and it's between the carb body and the cylinder try turning it clockwise 1/8 to 1/4 turn at a time and see if that improves things. If the screw is between carb and air filter try turning screw anti-clockwise etc etc.

2 stroke Ted, May 2010

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home label Garden Tools label_important Lawn Mowers

home Fix label Garden Tools label_important Lawn Mowers category Mountfield

Mountfield 46R PD Mower - Engine hunts?

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Mountfield 46R PD Mower - Engine hunts?

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Mountfield 46R PD Mower - Engine hunts?

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