Eric,only "Bean" named manufacturer I know about was associated with New Way motor company.
They had New Way engines on their sprayers. Have it in the back of my mind that they had their own brand engines on their sprayers as well. Here's a poor quality picture I found a while ago while researching the New Way company. I believe they are New Way engines in the photo. Just a possibility.-Cheers -Neil.
Thank you gents for your comments. Because I could find no mention of Arem in the Bean spray pump history, I thought them to be unlikely.
This engine, which belongs to a friend, looked home made to me too. But, the main components are castings, so though it possible that it was found with a lot of original bits missing, which have since been fabricated.
My first thought was a model someone has made. Many a kit has been made since the 1920's.
What number is on the plate Eric?
When you look at the engine, it's a high maintenance bit of kit. Chain driving the governor, buzz coil ignition with some fancy looking points behind the flywheel, the hit/miss linkage and the way the piston comes out the back of the block seems unusual. The way that cylinder is mounted underneath and the method of holding the engine down to the board also seem a bit flimsy. A brass or bronze inlet holding the inlet valve (valve cage) doesn't lead itself to a long serving engine. All signs of an engine that been 'made up'. In saying all that it is a great little engine I reckon. It would be a lucky person who owns it. Very lucky indeed.
What diameter would the flywheels be? They look familiar to me (minus the built in crank handle)