Engine number decoding

[Jonboy]

Hi everyone,
It’s been ages since I last posted but am looking for a new project.
It’s a lister-petter AC1 engine, but wanted more information on it if possible.
It’s engine number is 3803856ACR1A23.  6.0 BHP 3000RPM

It’s the R in the engine code that’s confusing me?
What does that mean?
Any other information grateful received. Eg what’s the going price for one of these?

Jon

[AdeV]

Hi everyone,
It’s been ages since I last posted but am looking for a new project.
It’s a lister-petter AC1 engine, but wanted more information on it if possible.
It’s engine number is 3803856ACR1A23.  6.0 BHP 3000RPM

It’s the R in the engine code that’s confusing me?
What does that mean?
Any other information grateful received. Eg what’s the going price for one of these?

Hey Jon,

R means Radiator Cooling, generally, although it's in a bit of an odd position (I'd expect it after the "1"). Also, isn't the AC1 an air-cooled engine? I've also read somewhere that it was only made in 1985 (at which point it was discontinued), but your engine numbersuggests it's a 1988 model... (38+50).

Short answer, it's a mystery!

Hard to put a value on it; the last one on eBay was an AC1Z (reverse rotation), siezed, and it failed to sell twice for £60. So... not a lot, I'm afraid.

[Jonboy]

Thanks Ade,
Nothing like a bit of mystery!
I just checked again and I definitely put the R in the right position in the engine code.
I suppose lister may have put it in the wrong place.
Thanks for the reply.