The ultimate lawnmower

Feb 07, 2009 39 Replies

To be fair, the Amal concentric carburettor wasn't great. It was probably the worst part of a very good mower.

Funnily enough, I've seen a Dennis mower with an SU carburettor fitted in place of the Amal.

Chris

I'm familiar with the mindset you're referring to. But it's definitely not what I'm talking about here.

Chris

Interesting. I always assumed a golf green was just a well-kept lawn. Is the idea of the sand to improve drainage?

Chris

Those reel mowers are of a very different design to the kind I usually see. They appear to be carried on wheels rather than on rollers (although one looks like it might have a hidden roller at the back).

It's remarkable that the 26" mower only has a 124 cc engine. The 24" Dennis has a 600 cc engine, but the same engine was also used for the

36" machine. But I'd lay money on that 124 cc engine wearing out a lot faster.

This is the direct descendant of the Dennis "Z Type". You can see that some of the features live on:

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Chris

I just found some pictures of early Locke mowers online. Interesting machines.

One of the big advantages of the Dennis design is that the chassis is mild steel rather than cast iron. Many of the early mowers were cast iron, and so got cracked when they were dropped or suffered impacts.

Chris

hey, let's be fair to the SU - they work really well until the jet wears out, then you just replace two parts - they never plug up, and the variable venturi keeps the mixture pretty close for a carburetted car.

Christopher Tidy fired this volley in news: snipped-for-privacy@cantabgold.net:

Hardness, so the ball rolls as if on a billiards table.

Then, then only "issues" a putter has are break (l/r slopes), longitudinal slope (uphill-downhill), and the very grain of the grass, which lays flat in one direction on a well-mowed green, thus inhibiting roll in one direction, and allowing it in the other, like a bunch of miniature pawls against a sprocket (the ball). And of course, moisture, wind, stupid noises, ball marks from other players, footprints, etc, etc....

LLoyd

The ultimate one is the lawnmower showin in the "Rehabilitation" program in movie Idiocracy. The movie is hilarious and is highly recommended. Available from your nearby torrent site.

I had a Locke triple. Nice machine but your lawn has to be very evenly graded. Currently using a 48" Scag with a 22 HP Tecumseh V-Twin.

SU stood for Standard Urination. They almost always leaked.

">>>> I still recall the SU's.....

maybe YOUR SU carbs leaked, mine did not, at least not if I replaced the required gaskets once per decade. my +4 was probably as abusive an installation as you will see - they worked well.

Thanks, Lloyd. That's interesting. I didn't know the science of grass was so sophisticated.

Chris

How did a mower come to be called Scag? I was sure I'd heard that word before, so I looked it up:

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Now you've put an image in my head of a guy riding a lawnmower and singing "One Toke Over the Line" :-).

Chris

My buddy raced a TR-3 and TR-4 and every other SU carbed racecar had leak problems. Since I raced a Vette did not have the SU problems. SCCA racing.

Possibly running too high a fuel pressure, IIRC the SU requires about

2-3 psi and other carbs such as Weber side draughts require 4-5 psi and can cause issues with float chamber flooding if the wrong pump pressure is used on the SU. The SUs I have used never leaked although I did change them for Dellorto side draughts as they seemed to perform better and stay in tune.

what you'll find over time is that the vibrations passing through the large roller compact the soil and stuff up the grass.

I've used two of them over the years. (they're made by Rover and Scott-Bonnar in Australia) After the last work over with the pitch fork to undo the compression and aerate the soil I swapped to a Victa and havent needed to aerate again.

ymmv Stealth Pilot

If you don't believe me, do you think they'll still

It's not like it's been mowing grass for 62 years. It's been sitting in a barn for most of it's life.

I was thinking more of the skanked out w**re meaning:-)

Apparently it was mowing grass at a cricket club into the 1990s. That's a lot of work in 50 years.

Chris

On the other hand, if you don't roll your grass at all, it gets uneven.

Chris

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