Hi everyone! I have recently been working on a project involving Simplex engines.
I would like to get as many Simplex engine codes as possible and try to find any similarities from them. I know that we will not be able to confirm that what we find is accurate but I think we might be able to learn more from these codes.

So far I only have 4 codes, pretty pitiful... but we have to start somewhere.
So far these are the codes I have from the not so Simple Simplex:

Stationary Simplex engine (similar to those on mowers but crank is difference, pulley difference, barrel and head one piece instead of 2)
- Upper case is R6
- Lower case is 698

Buz-A-Cut Mower
- Upper case is VM
- Lower case is 668
This is were it gets strange...

Pace 1S85 mower
- Upper case says nothing...
- Lower case is V8312

Rover Major (this is where it gets more normal)
- Upper case is VB
- Lower case is 2318

I am guessing the Buz-A-Cut and stationary engine are from early-mid 1956 which explains the lower numbers, and the Rover Major is late 1957, which is why the engine number jumps up to the 2000s. What I don't understand is why the Pace is so much different, why is it in the 8000s and why is there a V infront of the number? and why is there nothing on the upper crankcase? I would love to see more Pace mowers with Simplex engines to see if they are the same.

If you have a Simplex engine I would love to know the engine numbers and if possible a picture of the mower or engine. Hopefully I will be able to find some sort of pattern.

Thanks everyone! Hopefully we can learn some more about these engines.


Thanks for reading!