Allotment Gardening Advice Help Chat

Chatting => Equipment Shed => Topic started by: Motivator on May 12, 2012, 19:45

Title: Mountfield SP470
Post by: Motivator on May 12, 2012, 19:45

Hi my sister has this mower . And for some reason it has started running rough . It has a Briggs engine . From what i have read it could be a carb issue .  It was running fine when last used a month back . Now it seems to be misfiring .

Title: Re: Mountfield SP470
Post by: Gwiz on May 14, 2012, 05:40

Does it have the Briggs "Classic" engine with the red push primer to start? if so, replace the diaphragm and clean the petrol pick up tube at the same time.

Title: Re: Mountfield SP470
Post by: Motivator on May 14, 2012, 09:10

Yes thats the engine . Red primer button .  Was running mint now running awfull.

Title: Re: Mountfield SP470
Post by: Gwiz on May 14, 2012, 09:22

It sounds like the usual problem. Also check the oil level or better still replace it.
SAE 30 grade, 500-600ml. I think the diaphragm is about £2.50p-ish.
When you've got the carb of the petrol tank, wash the tank out with a bit of petrol to make sure there isn't any muck in there.

Title: Re: Mountfield SP470
Post by: Motivator on May 14, 2012, 13:32

Thanks Graham . I thought that would be the problem .  Will have to get the part sorted .

Title: Re: Mountfield SP470
Post by: Flatcat on May 14, 2012, 20:11

We have the exact same mower, but the hand propelled version

Our diaphragm got replaced in the service, so if you are taking it to the shop for repair, then an all round service would do it good as it obviously hasn't had one for a while  :D

Title: Re: Mountfield SP470
Post by: Motivator on June 13, 2012, 11:25

Worked a treat . Thanks all..

Title: Re: Mountfield SP470
Post by: andyw on June 13, 2012, 14:40

I've got an old 2hp briggs engine and this was having issues, I took of the carb and sprayed a load of carb cleaner in there, now it runs ok, well ok for an old machine.