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Collection, Preservation and Display of Old Lawn Mowers

Re-restoring my 18" Atco Standard

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Back in 1994-5 I largely restored my Standard. However I then got a job before I'd finished, moved away, my parents moved as well, and my pride and joy was relegated to the back of a damp barn, which didn't do it a lot of good. 

Finally in 2015 I had a house and a shed to keep it in (not the easiest things to keep in rented rooms and flats) and in 2020, in lieu of our spring holiday, I fitted a new coil and got it running again. It's done a few AGMs, but the unfinished state of it has always got my goat. 

So this time I am going to attempt to actually finish the bloody thing, get it running with the appropriate carb for a machine introduced in 1926 (though engine number is 1923), and document the process. 

Hopefully if anyone is interested you'll be able to tolerate my frankly verbose writing style (with regular explanatory brackets). And I'll try to keep the photos coming as the bits get done. 

There will doubtless be many questions in Technical - especially as I tend to think about something for ages, give up, ask, and two minutes after posting have a brainwave.  

Parts that I may or may not need that I already know of:

Oiler(s?)
Atco/Senspray carb (not going to pay Rudge owner money for a Senspray!)
Top rail for the handlebar of the full length for an 18". 

Onto the piccies. I'm forever intrigued by the mix of complex (those bronze eccentrics for tensioning everything) and simple (the modular design) in these machines. Yes, they're common as muck by the standards of century-old petrol mowers, but still pretty interesting. 

 

 

 

 

 

 

 

 

 

 

 

Forums

Adrian Mon, 24/08/2026

The remaining photos:

Hopefully Resto Mk2 will be an improvement!

 

 

 

 

 

 

 

 

Adrian Tue, 25/08/2026

Some more bits. 

My impromptu spray booth. 

Frustration! I bet this was a dealer plate - what could it have told me?

The toolbox looks to be the original sides and one piece of the bottom, but the rest has been replaced by a piece of tin screwed on. At the moment I can't get the nuts to unscrew - I think I will have to find a wide screwdriver and, in the meantime, keep slopping PlusGas on the nuts. I'm reluctant to cut them off because I don't know where I'll find replacement for a type of bolt I've never seen anywhere else. Suggestions for source of replacements or shifting them welcomed!

I have some wood retrieved from a skip that look a decent thickness for a new bottom, and for the insert inside as well. Just need to get this thing off first...

 

 



 

Andrew Briggs Wed, 26/08/2026

Wow - what a beast ! Interesting to try and understand how design principles have changed over the last 100 years.
It's obviously function over form but it still 'looks right' 

Adrian Thu, 27/08/2026

It certainly is a beast, Andrew! I found it in a shed at the school I did 6th form at. At the time, despite going to plenty of vintage rallies, I'd never seen anything like it. As it turns out, there's a lot about - Atco must have sold a great many. 

Mowing Wurzel Thu, 27/08/2026

Thank you Adrian for the interesting post of you beloved Atco.   Great photos and candid report.   I know things can take a long time to do with other commitments.  I also like the painting set up, its great weather this summer for painting outdoors.        Like yourself, when I was in the Sixth Form, I too rescued a Mower (Hayterette C. 1972) from the defunct tool shed, which I tinkered with and used to cut the grass for a few years.

I'm no expert on the Beautifully built Atco Standard, a design Icon of the Mower world, but sure there are a few experts out there.   I'm sure the relevant Atco & Villiers Literature is no doubt on the Club  website.

Best Wishes,   Paul the Mowing Wurzel.  (although very little Mowing this scorched year!)

Clive1997 Fri, 28/08/2026

Yes I think many of us in our early collecting days regarded the Atco Standard as being a great find, but as you say there are many & the it is the most commonly found 1920s motor mower. 

Atco stated that 14,000 had been sold by 1927 so bearing in mind they went on for another 4/5yrs total sales of the Standard would have been 20,000 plus.

Adrian Sun, 30/08/2026

First bits restored, with a little help from Mr Grout's spares emporium at an AGM a few years ago. The correct way to fit these involves peening the end of the handle over a washer (see pic of starting handle somewhere above), but I simply don't have the kit for that so these have been epoxied on (after a friend straightened one with his gas torch and anvil - I have always had serious tool envy round him!). I know it's only small parts, but it's a start, and it's something that spoilt the look of the original job as the original wooden handles had long since gone. 

Yes the green is a bit bright. But it's what's available, and the green on my engine mounting plates - which I suspect is the closest I have to original, bearing in mind that at least some of the mower had been repainted two or three times when I got it - is brighter than the BRG they seem to end up in.
 

 

Meanwhile... following the advice on another thread, I bought a 9" disc angle grinder from Screwfix for the derusting. Once I'd done that and realised how big the thing is, I read up on them and discovered they have a bit of a bad rep for safety. No surprise there, the thing is a brute! So I've taken a number of precautions to ensure my own personal safety. Overalls, thick gloves, safety boots, helmet with face protection. I've put them all on the Mrs and got her to do the donkey work!

 

Good to hear other people's memories of these things - and thanks for the info on likely production figures, Clive. I suspect another reason for the longevity is that there's so little sheet metal on them to rot out. 

An interesting discovery, BTW, I made when I dug out my spare handle side irons, is that there are different side irons - mine have a B after the number, the spares don't, and are significantly thicker. I suspect they are from one of the wider models. Once I've finished using them as part holders I'll clean, prime, and pass on to the next user!

 

Adrian Sun, 30/08/2026

Here's those chunkier handles - clearly bigger. 

Given how long it took me to get the bloody stuff on there all those years ago, it's a bit sad seeing how quickly the paint comes off. I'll feel better when it starts going back on again. 

I've also realised (should have earlier - I'm actually using it at work, on and off) that I should get some isopropyl alcohol to remove any residual grease. Off to the hardware shop (yes, we still have one) after work on Tuesday!