Omega Owners Forum

Chat Area => General Discussion Area => Topic started by: Field Marshal Dr. Opti on 10 May 2019, 17:49:54

Title: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti 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?
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Auto Addict on 10 May 2019, 17:59:09
Checkered stripes on the side, and a megaphone exhaust? ::)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Sir Tigger KC on 10 May 2019, 18:05:27
Get an electric mower!  :)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: scimmy_man on 10 May 2019, 18:07:40
get a goat
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Nick W 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 :)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: henryd on 10 May 2019, 18:15:03
Get the help to do it and have a G&T while watching them struggle
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti 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. :-\
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder 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 ?


Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti 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
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: TheBoy 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.
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: YZ250 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
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Gaffers on 10 May 2019, 18:30:50
Sharper blades?
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder 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  :-\
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti 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. :)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: BazaJT 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
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti on 10 May 2019, 18:49:13
Put the engine out of the Tata into it? That should give it a little more "go" ;D

........and put the mower engine in the Tata. :y

Can't be worse than a derv engine, I suppose. :)


Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: YZ250 on 10 May 2019, 18:53:16
Just to clarify, will it actually rev its tits off if you manually influence the throttle linkages. If unsure, just move any linkage to see if it actually will rev up.
Briggs, Troy Bilt, Honda etc. can all be influenced by bending one of the arms or spring on the governor arm but depending on what model you have depends where the rod is. Our Briggs goes across the front but our Toro goes from the carb linkages to the rear of the cylinder.
Grab any rod and move it to see if you can increase the revs, then bend/re-loop the arm or spring to suit.  :y

Sharp/balanced blades doesn't help, it's the nanny low rpm that causes them to die on you.  :y
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti on 10 May 2019, 18:56:30
Just to clarify, will it actually rev its tits off if you manually influence the throttle linkages. If unsure, just move any linkage to see if it actually will rev up.
Briggs, Troy Bilt, Honda etc. can all be influenced by bending one of the arms or spring on the governor arm but depending on what model you have depends where the rod is. Our Briggs goes across the front but our Toro goes from the carb linkages to the rear of the cylinder.
Grab any rod and move it to see if you can increase the revs, then bend/re-loop the arm or spring to suit.  :y

Sharp/balanced blades doesn't help, it's the nanny low rpm that causes them to die on you.  :y


It won't rev it's tits off regardless of what I pull.
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Varche on 10 May 2019, 19:15:37
Does your gardener not speak to your mechanic direct ?

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


My 8hp ride on mower tractor is Briggs and Stratton and can pull a wheelie in most gears. Have you had a look to see if there is a dead mouse in the airfilter?

I am thinking you need a derv powered mower. Something out of a canal boat. :y

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

I think a Honda may be a better bet according to the 'information superhighway' :y
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: plym ian on 10 May 2019, 19:20:45
Thought you had a gardener anyway :)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: YZ250 on 10 May 2019, 19:38:28
What engine, Briggs 625exi or similar ?? with plastic engine cover?? Remove the top cover to gain better access to the linkages. You can run them without the top cover. What happens when you manually influence the linkages, does it bog down and die? If it does you could try cleaning out the carb, they are a piece of piss to clean out once removed.  :y If nothing happens the throttle arm is not working. They are very basic, auto-choke arm, throttle arm and governor. If I was nearer I'd have a look for you, I quite enjoy tinkering with mowers/strimmers etc.  :D  Yeh, sad I know.  ;D
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 19:40:50
Put the engine out of the Tata into it? That should give it a little more "go" ;D

........and put the mower engine in the Tata. :y

Can't be worse than a derv engine, I suppose. :)
A diesel motor would give you oodles of torque, cut right through a tree trunk.  ;D
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Sir Tigger KC on 10 May 2019, 19:43:49
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 19:44:22
Aldi special buy this week:
https://www.aldi.co.uk/self-propelled-petrol-lawn-mower/p/097814271231500?utm_source=Aldi&utm_medium=Email&utm_content=Header&utm_campaign=NFSBLarge10052019&sap-outbound-id=DD710C0FE9C2A169F26305712F3A8020AC857BD6
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 19:46:15
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti on 10 May 2019, 20:09:18
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger

Yep....not enough length. The lead I mean. :)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: YZ250 on 10 May 2019, 20:11:05
Aldi special buy this week:
https://www.aldi.co.uk/self-propelled-petrol-lawn-mower/p/097814271231500?utm_source=Aldi&utm_medium=Email&utm_content=Header&utm_campaign=NFSBLarge10052019&sap-outbound-id=DD710C0FE9C2A169F26305712F3A8020AC857BD6

That's essentially what he's already got I believe, the one above just being sold as a 'Garden Line' product. Mountfield are the same, with the lower end fitted with Briggs and the higher end fitted with Honda. Hayter use Briggs on most now so the mowers end up looking the same, just with Briggs or Honda engines.
With Opti's vast estate he may be better off with a larger Toro or Honda.
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti on 10 May 2019, 20:13:09
Aldi special buy this week:
https://www.aldi.co.uk/self-propelled-petrol-lawn-mower/p/097814271231500?utm_source=Aldi&utm_medium=Email&utm_content=Header&utm_campaign=NFSBLarge10052019&sap-outbound-id=DD710C0FE9C2A169F26305712F3A8020AC857BD6


In appearance and specification it is almost identical to the model I currently loathe and despise. :y
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Field Marshal Dr. Opti on 10 May 2019, 20:15:52
I should learn to read the previous post. :-\
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: YZ250 on 10 May 2019, 20:21:54
I should learn to read the previous post. :-\

 ;D :y

Buy the Aldi mower with three years guarantee, swap some bits over until yours is a runner and then take it back and say it's shite.   ;D :y
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 20:23:28
Aldi special buy this week:
https://www.aldi.co.uk/self-propelled-petrol-lawn-mower/p/097814271231500?utm_source=Aldi&utm_medium=Email&utm_content=Header&utm_campaign=NFSBLarge10052019&sap-outbound-id=DD710C0FE9C2A169F26305712F3A8020AC857BD6


In appearance and specification it is almost identical to the model I currently loathe and despise. :y
You could have loathed and despised the Aldi one for less money.
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder on 10 May 2019, 20:23:54
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger

Yep....not enough length. The lead I mean. :)

scatter some of these cheap battery packs (https://www.ebay.co.uk/itm/New-Pramac-22kVA-20kVA-Silent-Diesel-Generator-3-Phase-15KW-400V-Genset/332687346115?hash=item4d75b609c3:g:ogIAAOSwIhRbI-HH) about your land  :y for the gardener to plug into
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Sir Tigger KC on 10 May 2019, 21:18:19
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger

Yep....not enough length. The lead I mean. :)

scatter some of these cheap battery packs (https://www.ebay.co.uk/itm/New-Pramac-22kVA-20kVA-Silent-Diesel-Generator-3-Phase-15KW-400V-Genset/332687346115?hash=item4d75b609c3:g:ogIAAOSwIhRbI-HH) about your land  :y for the gardener to plug into

Hmmm those might scare the Peacocks Dave.  :-\
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder on 10 May 2019, 21:35:30
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger

Yep....not enough length. The lead I mean. :)

scatter some of these cheap battery packs (https://www.ebay.co.uk/itm/New-Pramac-22kVA-20kVA-Silent-Diesel-Generator-3-Phase-15KW-400V-Genset/332687346115?hash=item4d75b609c3:g:ogIAAOSwIhRbI-HH) about your land  :y for the gardener to plug into

Hmmm those might scare the Peacocks Dave.  :-\
I thought His pet lions ate all the Peacocks and small livestock   ???
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 21:38:47
You don't get any of this aggro with an electric mower, just plug her in and away we go!  :y
What would the power drop be with a 500m extension? Lord Opti's grounds are extensive.


Unlike his todger

Yep....not enough length. The lead I mean. :)

scatter some of these cheap battery packs (https://www.ebay.co.uk/itm/New-Pramac-22kVA-20kVA-Silent-Diesel-Generator-3-Phase-15KW-400V-Genset/332687346115?hash=item4d75b609c3:g:ogIAAOSwIhRbI-HH) about your land  :y for the gardener to plug into

Hmmm those might scare the Peacocks Dave.  :-\
I thought His pet lions ate all the Peacocks and small livestock   ???
My neighbours brother used to own a lion:

https://visitcudworth.co.uk/the-cudworth-lion/
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 21:41:01
And then he bought a ranch to hide all his dodgy money, and.........

https://www.yorkshirepost.co.uk/news/latest-news/barnsley-s-lion-man-hits-black-gold-in-wild-west-1-2576660
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder on 10 May 2019, 21:52:16
there must be a lot of rich people in Barnsley
it's VERY HEAVILY POLICED  :o
I see Barnsley on the news,police camera action, road wars, traffic cops ,crimewatch,nightcops,Dixon of dock Barnsley green.......
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: STEMO on 10 May 2019, 22:10:21
there must be a lot of rich people in Barnsley
it's VERY HEAVILY POLICED  :o
I see Barnsley on the news,police camera action, road wars, traffic cops ,crimewatch,nightcops,Dixon of dock Barnsley green.......
It's just one fella, he's very prolific.  ;D
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: dave the builder on 10 May 2019, 22:30:07
there must be a lot of rich people in Barnsley
it's VERY HEAVILY POLICED  :o
I see Barnsley on the news,police camera action, road wars, traffic cops ,crimewatch,nightcops,Dixon of dock Barnsley green.......
It's just one Scouse scally , he's very prolific.  ;D

I don't know what prolific means  ???
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Doctor Gollum on 11 May 2019, 02:29:01
Busy, in a 'gets around' type of way ;)
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Viral_Jim on 11 May 2019, 22:29:37
Aldi special buy this week:
https://www.aldi.co.uk/self-propelled-petrol-lawn-mower/p/097814271231500?utm_source=Aldi&utm_medium=Email&utm_content=Header&utm_campaign=NFSBLarge10052019&sap-outbound-id=DD710C0FE9C2A169F26305712F3A8020AC857BD6


In appearance and specification it is almost identical to the model I currently loathe and despise. :y

Wickes will sell you an almost identical one for a quid less, that doesn't have a BS engine.
Title: Re: Qualcast 51cm petrol mower.......utter shite.
Post by: Darius on 12 May 2019, 17:20:59
If it isn't revving it's probably fuel starvation.

I had a similar problem with a two-stroke strimmer and I eventually traced it to the "transparent yellow" plastic tube used for the petrol pipe which was slowly being dissolved by the petrol and gumming up the carburettor.

Clean the jets in the carb and replace the pipe with good petrol-proof pipe.  Use a bit of RedeX to keep the carb clean.