Douglas - For Sale Items

Douglas 1913 Model P motorcycle

Douglas - Wanted Items

Douglas 1915 3 Spd-Gearbox and Clutch

Support & How to Join

Side Panel Notices

Quick Comments

Reminders, links to interesting topics, bump your own topic, quick comments or any short message of interest to members. Try it out!
Please note - 500 character current limit


Today at 01:04:34
Welcome to the new site!

Recommended viewing for a fast start...
 - Quick Tour of the Front Page
 - Quick Tour of the new Attachments

Please see the bottom post in this topic for more info.

identifying an engine

Started by alistair, 24 May 2014 at 18:58

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.


can anyone help to identify an engine which i have recently acquired,
It has 1924 stamped on the timing chest and the number 69782  on the casing above the rear cylinder.
it is on a mounting which looks factory made and i wonder if it could be a stationary engine or small industrial power source as opposed to a motorcycle engine.
how can i tell?
any help would be appreciated.



69782 would fall in the numbering range for a 1924, 2-3/4hp model. Douglas did indeed make stationary engine variants using these engines, but I do not know what numbering scheme that they used. Unlikely that they made 70k stationary engines, so I think this is a cycle engine re-purposed.

Most of the stationary engine 2-3/4hp have a oil sump and a place for a hand crank on the timing side. An example can be seen in this post:

There is another type without a sump (or I do not think it has a sump), on a larger cast aluminum base seen in this post:
While it looks like the motorcycle engine bolted in a cradle, the crankcase casting is slightly different between the two. Though I do not know if that stops you from using the motorcycle engine in one of these cradles, as the difference that I speak of concerns the top of the crankcase. 

At this link in the photo gallery is a 1925 model, that has some good pictures of the 'standard' 2-3/4hp motorcycle engine: