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Author Topic: Qualcast 51cm petrol mower.......utter shite.  (Read 723 times)

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Field Marshal Dr. Opti

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Qualcast 51cm petrol mower.......utter shite.
« on: 10 May 2019, 17:49:54 »

This mower has never had any guts in it. The lawn has to be only slightly long and it will struggle not to stall.

It has a 123cc 4 stroke engine that seems devoid of any torque, and nothing like as good as an old Atco I had years ago that would batter it's way through just about anything.

I think the problem is with the carb that is so puny (and plastic) that it won't allow the mower to rev.

Any idea on how to give it some balls?
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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #1 on: 10 May 2019, 17:59:09 »

Checkered stripes on the side, and a megaphone exhaust? ::)
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Sir Tigger QC

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #2 on: 10 May 2019, 18:05:27 »

Get an electric mower!  :)
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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #3 on: 10 May 2019, 18:07:40 »

get a goat
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Nick W

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #4 on: 10 May 2019, 18:14:40 »

Nitrous. It's a perfect candidate for a small 50hp kit. It will make mowing the lawn a laugh :)
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henryd

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #5 on: 10 May 2019, 18:15:03 »

Get the help to do it and have a G&T while watching them struggle
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Field Marshal Dr. Opti

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #6 on: 10 May 2019, 18:17:58 »

I've removed the air filter in case it was being too restrictive. No difference.

A weber carb may help... ::)

It just won't rev. :-\
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dave the builder

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #7 on: 10 May 2019, 18:19:39 »

Does your gardener not speak to your mechanic direct ?

assume it's a Briggs and stratton  :-\
what model engine ?


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Field Marshal Dr. Opti

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #8 on: 10 May 2019, 18:26:54 »

Does your gardener not speak to your mechanic direct ?

assume it's a Briggs and stratton  :-\
what model engine ?


Yes....B and G. Utter crap.

I think a Honda may be a better bet according to the 'information superhighway' :y
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TheBoy

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #9 on: 10 May 2019, 18:28:41 »

My old Honda Izzy was brilliant, but not fireproof.  I have a clapped out B&S based Hayter now. No idea where the throttle is, but is fine.
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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #10 on: 10 May 2019, 18:29:18 »

To lower emissions they lowered the rpm, which in turn affected the speed of cut and caused them to bog down on long wet grass. You can usually get away with bending the governor arm to get them to rev higher. You'd be surprised, those little carbs will handle it. They probably cog them down to about 2600rpm but with a bit of fine bending you'll get it to run at around 3000rpm. I think they top out around 3600rpm but it's painful to listen to.  ::) ;D

Sell it and buy a Toro or Honda for your big garden.  :y
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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #11 on: 10 May 2019, 18:30:50 »

Sharper blades?
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dave the builder

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #12 on: 10 May 2019, 18:31:27 »

a new carb is cheap , no battery to short out, but it is fiddly
if it has been left over winter with stale fuel in ,part blocked jet perhaps  :-\
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Field Marshal Dr. Opti

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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #13 on: 10 May 2019, 18:37:41 »

To lower emissions they lowered the rpm, which in turn affected the speed of cut and caused them to bog down on long wet grass. You can usually get away with bending the governor arm to get them to rev higher. You'd be surprised, those little carbs will handle it. They probably cog them down to about 2600rpm but with a bit of fine bending you'll get it to run at around 3000rpm. I think they top out around 3600rpm but it's painful to listen to.  ::) ;D

Sell it and buy a Toro or Honda for your big garden.  :y


 Interesting......Where exactly is the governor  arm?

I suppose I could drop a lump of Detroit V8 in it but I worry it would spoil the well-balanced handling. :)
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Re: Qualcast 51cm petrol mower.......utter shite.
« Reply #14 on: 10 May 2019, 18:38:44 »

Put the engine out of the Tata into it? That should give it a little more "go" ;D
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