my lawnmower keeps stalling it is a briggs and stratton sp470 it startsalright when primed but does not work for more than a few minutes as if it is being starved of petrol

w. skingle, April 2007

i could any tell me what kind of fuel i need to put in my mountfield lawnmower it is a gvc135 thanks

george, March 2013

mower starts but stops as soon as it uses pre start petrol up

Richard, June 2009

the coil has un-coiled

jason sandiford, May 2009

where can I buy a new Mountfield 460 diaphram?

paddytt, March 2009

Try fitting a see through petrol filter between the tank and the engine. Cost is only about £3 [$4] and you know for sure whether it is petrol starvation. Can't help any further, as I have the same fault, and can't find out why the petrol is not reaching the engine after 30minutes of ok running.

rwn, September 2008

it keeps reving , how do i stop this??

liam, September 2008

HELLO,THIS SOUNDS LIKE A DIAPHRAM PROBLEM,YOU NEED TO REPLACE THIS BY FIRST REMOVING THE FUEL TANK/CARB ASSEMBLY-REMOVE ONE 1/2INCH BOLT ON SIDE AND ONE 7/16 BOLT ON THE FRONT,THEN CAREFULLY REMOVE THE L SHAPED RUBBER PIPE,ONCE REMOVED,CLEAN THE CARB AND TANK ASSEMBLY,THEN REMOVE THE CROSS HEADED SCREWS THAT HOLD THE CARB TO THE TANK,AND VERY CAREFULLY LIFT THE CARB OFF THE TANK AND WITH THE CARB HELD UPSIDE DOWN CAREFULLY REMOVE THE DARK GREY GASKET AND THIN RUBBER DIAPHRAM,TAKING CARE NOT TO DISLODGE THE SMALL SPRING,REPLACEMENT IS A REVERSE PROCEDURE TO REMOVAL,TAKE THE OLD DIAPHRAM TO COMPARE WITH THE NEW ONE,AND KEEP EVERYTHING CLEAN,BEST OF LUCK,FUGIEIAN.

FUGIEIAN, April 2008

Check the link rod between the carburetor & the engine i found mine was cracked after catching it under the hedge.

Doug Hanson., April 2007