In the rocker box of my Model 9 from 1937 I have an adjustment option for the inlet valve (some engines also have this for the exhaust valve). Do you have that too?

Hi
Just starting engine after full rebuild Model 9 1936 newer hearing it before
Looks like to much oil is pumping to valve guides and leaking over head
Is any adjustment for oil flow?
Thanks for help and sorry for bad English
Greetings from Scotland

A strip of polished steel is glued to my tank. I have never seen this on any other machine. Is this original and/or what could it be for?
Thomas

Hi Russ,

you can estimate it by yourself by considering the angular connection between crank rotation and linear stroke. A full motor revolution of 360 degrees transports the piston from one TDC to the next. I set the zero point of the necessary sinus function at half stroke (49mm, 90° BTDC). That means, the crank rotation has its upper maximum (TDC) at 90°.

55° BTDC are then 35° from zero of the sinus. sin 35° is about 0.57 of the 49mm half stroke, hence at 28mm from zero. That is far away from 49mm – 14.3mm (9/16") = 34.7mm. So, either 9/16" or 55° are wrong. My 1937 Model 9 runs perfectly well with 9/16" BTDC (as given in the user manual). The upper calculation then results in 43° BTDC.

BTW: When for any reason an adjustment on the road is needed you can just take a 9/16 spanner as a measure.

Cheers, Thomas

ok chaps so I'm after ignition timing  for my 1927 model 9 I've seen the chart here and know it's 55 deg's BTDC but does anyone know what that is in inches so I can stick a measuring stick down the plug hole.....I've read in one of the old Sunbeam manuals it gives it as 9/16" BTDC does that sound right?

anyone going? I'll be there be nice to put names to faces....I'm hoping to ride there if I can get the blessed thing to run properly....maybe I'll trailer it there running or not.....I'll stick a few photos up over the weekend

https://www.brooklandsmuseum.com/whats-on/brooklands-sunbeam-100

Thank you Daniel, I knew Georg... I will ask him for a black sweater...

Interesting Numbers from the Swiss Register. Attached you find following information:

2023_Sunbeam-Schweiz_1 --> is giving you an overview of all registered Sunbeams in Switzerland (95), with a range in which decade first registered

2023_Sunbeam-Schweiz_2 &_3 --> is giving you more details about which model is registered

To make it easier to understand. Before 1945 no type certificate has been issued. Meaning all Marston Sunbeams have Certificate (Typengenehmigung) X. Since there is no proper database for TC X it might be possible, that 2 equal models are mentioned separate.

The last column is showing how many machines of the specific model are presently registered. The Number in parentheses is telling you how many machines of the specific model have been registerd during the last 5 years)

Regards
Dani

Thats the one he made for me. Not cheap, but very well made. The guys name is Georg Eichsleder.

From time to time an austrian guy does advertisement in the facebook group for them. But you need to be fast, he is deleting the post once he has enough orders.