Problem starting Mountfield S461R PD lawn mower

mroshaw

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Nov 3, 2013, 4:30:30 AM11/3/13

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Hi!

I have a 3-4 year old Mountfield S461R PD lawn mower. All working
splendidly up until last weekend when it just cut out 3/4 of the way
through the cut. Now, I just cannot get the thing started.

I've:

- Replaced the spark plug
- Cleaned the air filter
- Checked and changed the oil
- Checked there's plenty of petrol
- Cleaned the blade

But nothing seems to have helped.

It will briefly start up, with the choke on full, but then quickly shuts
down. I don't even get that far without the choke - I wonder if that's a
clue as to what's wrong?

Any thoughts on what to look at next would be greatly appreciated!

Regards,

mroshaw

--
mroshaw

Gary Woods

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Nov 3, 2013, 11:02:09 AM11/3/13

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mroshaw <mroshaw...@gardenbanter.co.uk> wrote:

>It will briefly start up, with the choke on full, but then quickly shuts
>down. I don't even get that far without the choke - I wonder if that's a
>clue as to what's wrong?

I don't know that brand, but generic stuff:
Sounds like it's starving for fuel; either something in the carburetor is
plugged up, or the fuel line or filter (if any; sometimes there's a
strainer in the tank) are blocked.

--
Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic
Zone 5/4 in upstate New York, 1420' elevation. NY WO G

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Dave Liquorice

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Nov 3, 2013, 11:35:55 AM11/3/13

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On Sun, 3 Nov 2013 10:30:30 +0100, mroshaw wrote:

> I have a 3-4 year old Mountfield S461R PD lawn mower.

Find out what engine you have, Mountfield are just a brand. I have a
"Mountfield" mower but the engine is Briggs & Stratten. Once you know
the engine maker wander over to their website and see if they have a
manual, the B&S site is pretty good.

> It will briefly start up, with the choke on full, but then quickly shuts
> down.

Fuel starvation. Either blocked filter or a bit of crud in a jet.
Take the carb off an back flush it with clean fuel. As it was working
well and just died don't be tempted to adjust any of the jets.

--
Cheers
Dave.

Alan (BigAl)

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Nov 4, 2013, 6:33:17 AM11/4/13

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+1 on the B&S website. +1 on the fuel starvation
I had similar problem and the cause was a degraded gasket (seal) in the
carbureter, where it was joined to the tank.
New gasket and new primer bulb and the mower is running sweetly again.

mroshaw

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Nov 6, 2013, 8:33:55 AM11/6/13

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Hi all and thanks for the replies!

It has a Mountfield RV150 engine.

I don't quite know how, but I got it running again! I cleaned thoroughly
around the blade and sprayed a bit of WD40 here and there - fired up
just nicely!

As I say, no real understanding of how I got it working - probably just
the magical properties of WD40 and luck! :)

Regards,

mroshaw

--
mroshaw

Bob Hobden

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Nov 6, 2013, 11:19:26 AM11/6/13

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"mroshaw" wrote

More likely the fact you tipped it over to look at the blade dislodged some
dirt in the fuel system or loosened something stuck like the float needle.
--
Regards. Bob Hobden.
Posted to this Newsgroup from the W of London, UK

Road_Hog

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Nov 8, 2013, 3:30:52 AM11/8/13

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Unfortunately Mountfield no longer exists as a company anymore, it is just a brand name, it is part of GGP.

http://www.ggp-group.com/

Last time I looked, most of their hand mowers were built in Italy and it sounds like you have a Cinese built engine. Cheap but not great quality.

It would seem like you have a carburettor problem, which could be any number of things, including an air leak through the gasket, which is upsetting the fuel/air mix.

TBH, it will mean a trip to the dealers.

davidf...@gmail.com

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Jul 28, 2020, 12:58:20 AM7/28/20

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Trip to the dealers?
He had got it going
9 times out of 10 if you clean the carb that will sort engine running problems