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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. I've checked air intake - all ok. Any ideas?

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Posted on Jan 02, 2017

  • 37 Answers

SOURCE: mountfield sp470

Hi, first you'll have to change the air filter and the spark plug. now, go buy some hi octane gas. drain the old gas and put the fresh gas in. if this don't solve your problem please write again.

Posted on Nov 23, 2008

  • 3 Answers

SOURCE: maintenace Manual for Suffolk Punch petrol-driven Lawnmower

Have you checked with the company that makes the mower for the manual? Hae you tried searching the internet to see if you find the manual there?

Posted on Dec 09, 2008

  • 10865 Answers

SOURCE: what fuel do use in the mountfield HP470 petrol

No. This is a 4 stroke engine and it uses regular gasoline, not a mix.

Posted on May 06, 2009

  • 279 Answers

SOURCE: Running problems with Mountfield HP454 petrol lawnmower

First thing to check is the air filter. It may be plugged.

Posted on May 28, 2010

SOURCE: How do I change a worn Carburettor Gasket and

Hunting and erratic operation are signs of air leaks or diminished fuel flow at WOT settings.

If this mower is running a vacu jet style carb with a diaphragm you simply take off the air cleaner, the vent tube, and then the four screws holding the carb on the gas tank and after the carb body can be lifted remove the throttle linkage so you can flip over the carb and pull the main jet and clean the inlet screens.
http://www.psep.biz/store/briggs_stratton_carburetor_kits.htm

Posted on Aug 11, 2010

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If this mower is running a vacu jet style carb with a diaphragm you simply take off the air cleaner, the vent tube, and then the four screws holding the carb on the gas tank and after the carb body can be lifted remove the throttle linkage so you can flip over the carb and pull the main jet and clean the inlet screens.
http://www.psep.biz/store/briggs_stratton_carburetor_kits.htm

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What fuel do use in the mountfield HP470 petrol lawnmower is it a 2stroke mix?


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Hi, first you'll have to change the air filter and the spark plug. now, go buy some hi octane gas. drain the old gas and put the fresh gas in. if this don't solve your problem please write again.

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