engine numbers

[Danny shaw]

I've just checked the engine number on my 1953 s11 803cc and expectedly it doesn't match the recorded number . What i'm after is the capacity (guessing it 's probably still an 803 )and the approx year of manufacter? The number is 9m-u-h-593183. As a point of interest the distributor is numbered as 40561-l is this original to an 803 ?Any ideas appreciated. Cheers Dan

[LouiseM]

A '9m' prefix signifies a 948cc engine. If you check the engine block on the manifold side there should be '950' either cast on the block or on an attached metal plate.

[POMMReg]

948cc dates to late '61/early '62 according to the book.

[Danny shaw]

Thanks very much for that ,today is just getting better and better as not only have I got the car up and running but you've just confirmed me having another 145cc !! extra power is always welcome.