[Thomas]

The discharge appears to be behind the primary case and to one side of the rear wheel.

Yes, the oil mist is simply directed towards the ground. There is no dripping oil. The drive chain is lubricated directly from the primary chain case via a valve. I don't know how this is realised with other model years.

[billhaworth@aol.com]

Fig 24, p16 of this file
 
1937 Sunbeam Model 9 Engine Overhaul

Marston Sunbeam Club
https://www.marston-sunbeam.org › sunbeamFor...

show sthe oil tank breather pipe. I have just made one for my 1934 Model 9A rebuild project.
The disharge appears to be behind the primary case and to one sid eof the rear wheel.

Good luck!

[Rick Parkington]

Hi Ian, I don't know the answer I'm afraid, my (unrestored) 9A came with no pipe attached to the union in the tank bottom - I decided to fit an old chromed bit that I pointed at the rear chain but on reflection, given that t's an oil tank breather - rather than overflow - pipe, maybe it didn't ever have a pipe on it since it's there to accommodate frothy returning oil and allow the - often moist - air to escape without condensation contaminating the oil. The same really applies to engine breathers, if the engine is in good condition what comes out should really be steam rather than oil.
Cheers Rick   

[Ian Roberts]

Hi
The oil pressure crankcase release valve (conveniently situated behind the timing casing) has copper pipe routed into a hole in  the upper chain case to expel oil on chain - I assume.

The oil tank has a connection for an overflow pipe - where would this be routed too?

Thanks for replies in advance

Regards Ian