v8kid
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| posted on 26/10/16 at 08:50 PM |
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Turbocharged Honda (lawnmower)
no it's not another go faster USA lawnmower blog but a seriously important point (for graasscutters).
I've got a 650cc twin lawnmower and cut a sloping 6 acre lawn, it's too bloody slow! Going uphill I have to slow down to leave enough
power to the cutting blades I reckon if I had another 5 hp I'd Fi is at least an hour sooner.
So how to do it?
The ignition is magneto and the fuel is a rudimentary carb. Fuel consumption is not an issue as I can cut the whole field on a tank full. The engine
has a vertical crank and I'm willing to spend 1k.
What do I do?
If the time spent exceeds 1 years time saving it's a bummer as I have a life (of sorts) 
The existing mower has a 1.2m cut and to upgrade to a significantly wider cut is def not locost.
Unusually I can't decide looking for inspiration
Cheers!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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ste
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| posted on 26/10/16 at 10:34 PM |
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Nitrous Oxide?
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ettore bugatti
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| posted on 26/10/16 at 10:39 PM |
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Already taken the governor off?
But youtube offers all the options you want to look into.
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mark chandler
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| posted on 26/10/16 at 10:55 PM |
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Sell it, put the money towards some gang mowers and a little Ferguson tractor.
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russbost
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| posted on 27/10/16 at 08:04 AM |
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could you not simply add a 2nd engine linking the 2 with a drive belt - something like this unit maybe (I'm assuming what you have has a
vertical shaft drive?)
6.5hp engine electric start petrol vertical straight shaft 196cc 4-stroke 2L
Alternatively simply a larger or more powerful version of what you already have - you don't say how many HP it has at the moment, if it was
horizontal drive I'd say stick a motorcycle engine on it
You already have 650cc, would higher compression, gas flowing & a larger carb not give you another 5hp?
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headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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mark chandler
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| posted on 27/10/16 at 08:58 AM |
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You could of course go left to right rather than up and down, that's free!
Bigger carb may provide more HP, will it add a lot of torque though... If you can find a small turbo, feed it oil (has your motor got an oil pump you
can access) then this does sound promising.
Older mowers had horizontal engines as that's all they made with a v belt twisting 90 degrees, will your drive allow this?
I w our still go TVO fergie, more fun , my mate had a few acres and dragged a mower gang around behind a landrover....
[Edited on 27/10/16 by mark chandler]
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motorcycle_mayhem
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| posted on 27/10/16 at 04:12 PM |
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You need a MF35 and a cutter deck.
In a previous life, this is what I used when I had some real estate. The MF35 is a lovely thing.
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Irony
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| posted on 27/10/16 at 05:12 PM |
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quote:
Originally posted by mark chandler
You could of course go left to right rather than up and down, that's free!
Haha, the OP is probably kicking himself.
[Edited on 27/10/16 by mark chandler]
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Jon Ison
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| posted on 27/10/16 at 05:28 PM |
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Buy a horse
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joneh
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| posted on 27/10/16 at 06:40 PM |
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Lose weight? Sharpen the blade? Check tyre pressure? Check air filter is clear?
Free to do and could make some gains.
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morcus
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| posted on 27/10/16 at 09:21 PM |
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Geese
In a White Room, With Black Curtains, By the Station.
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sdh2903
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| posted on 27/10/16 at 09:26 PM |
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Horses destroy fields, you need a small flock of sheep. Give em a bit of a haircut everynow and then and you'll get some good fresh lamb in the
spring. 
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owelly
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| posted on 28/10/16 at 04:16 AM |
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Mount another engine on the cutter deck and tow it alongside the tractor. That leaves the tractor engine to do its thing whilst the mower engine can
run flat out.
http://www.ppcmag.co.uk
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nick205
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| posted on 28/10/16 at 08:08 AM |
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quote:
Originally posted by Jon Ison
Buy a horse
Quality - let nature do the work for you.
With a father selling garden machinery for a living my suggestion would be to take it easy and invest in a lawn tractor with collector. Much more
fun!
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v8kid
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| posted on 10/2/17 at 02:50 PM |
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Turbocharged Honda (lawnmower) Successfull!
OK tried almost all of those suggestions - SUCESSFULLY!
With hydrostatic transmission the highest gear ratio is fixed so logically I have to increase revs - first suggestion was to remove governor
however her indoors drives it sometimes 
A bit more research showed that these engines get valve float above 4k revs so some experimentation with governor springs increased the no load revs
from 2700rpm to 3600rpm. So far so good.
However additional revs does not necessarily mean sufficient power to pull revs so I changed the mulching blades to straight cutting blades which
absorb substantially less power. Ditching the grassbox and making up a polycarbonate grass ejector chute dropped 50lb weight.
Result? I now cut the whole field in a quarter of the time that I used to - the wee sonsie thing even does power slides in the muddy bits going
downhill The extra revs on the cutter blades seems to cut rushes easier and it does not slow down when going through a patch of them now. However
the noise of the twin rotor blades is scary - needs ear defenders and I'm very happy to have a solid steel deck in case the blades come loose -
as has happened before!!! ( witness the gauges out of the deck).
I think I have just enough room to go up a tiny bit in tyre diameter at the back and that's it for the mechanical mods. Total cost £60 for new
blades - the old ones had been sharpened umpteen times so say half that could be allocated to wear and tear - £30 cost!!.
As for cutting patterns you are all wrong the fastest way is cutting in a circular pattern and ensuring going downhill at boggy bits otherwise it gets
well and truly stuck ( perhaps paddle type rear wheels is a solution?).
Ta for all the replies after my research I now know more about GX620 engines than most people really should
Cheers!
PS Horses make a Bl00dy mess of fields - never again!
[Edited on 10-2-17 by v8kid]
[Edited on 10-2-17 by v8kid]
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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