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[RobertC]

Hi all, A Maxwell Hemmens boiler and engine appeared on a certain internet auction site today for a short while. I recognise the boiler as a MH Kingdom but which engine is this? And what size of boat would it comfortably power. The boiler was described as being approximately 12cm tall by 10cm diameter



Thanks in Advance, Rob

[DBS88]

The engine is a Max2 minus the steam valve and water pump, its bore is 9.5mm and its stroke is 15.8mm, should power a 75mm prop with ease, suitable for boats unto 1.2m in length, operating pressure 30 to 80 psi

[RobertC]

The engine is a Max2 minus the steam valve and water pump, its bore is 9.5mm and its stroke is 15.8mm, should power a 75mm prop with ease, suitable for boats unto 1.2m in length, operating pressure 30 to 80 psi


Thanks, I have a Max2 and it looked subtly different? I was wondering if it was a Caton? Cheers Rob

[DBS88]

Rob, I did wonder if it was the Caton, they were available in red, although all the ones I have seen were in green. The bore and stroke are the same as the later Max2. The fittings used for the Caton appear to be metric, 5mm by 0.5mm and 6mm by 0.5mm where the Max 2 uses ME Threads, 1/4 by 40, so the fittings are not interchangeable, but, they will confirm for you whether its a Caton or a Max 2

[RobertC]

That’s interesting, so the thread we can see top middle is likely to be 6mm by 0.5mm if it’s a Caton. A friend of mine has a Caton plant and that’s also red so it’s not beyond the realms of possibility, maybe they’re relatively late in production and the red paint was carried over onto the Max2. Hopefully they’ll arrive tomorrow so I can look further into it.
My Max2 is currently in Norfolk but I should have it to hand at the weekend.

[DBS88]

The engine you have shown may well be the Caton, I have had a closer look at the Max 2 and there are differences between my Max2 and the engine you show in the photos, the top frame where the oil cups are located is definitely  different