The purist should read no further.
A couple of years ago I picked up a box of Seagull parts at the Carrigfergus boat jumble.Haven't been back since
.There were a lot of bits in it,including a couple of forty blocks and crankcases.So I figured I might use them to Frankenstein a wee gull for my Mirror dingy,and see what could actually cobbled together from the bits.
I cut my own crankcase/block from gasket paper.
Son-in-law is model maker,robbed a piece of copper sheet from him and cut the head gasket from that.
Assembled crankcase and block
So a chat with Tam,thanks for the bitties.
Soaked and cleaned said bitties,threw the whole lot together,borrowed the tank and fuel line from the 40 Plus.
Because I was firing it up out of water and on a not too strong a bracket,I used the dreaded socket on a drill method.Two seconds later she's running.
So I closed it off and out of curiosity,I pulled it with the rope and away it went again.
There's no number on the crankcase,so probably NOS.
What it does show is the sturdiness of these wee single cylinder engines.
I plan to take a angle grinder to it and reduce it in length to fit on the Mirror,mind you I do have a height adjuster,but I think cutting might put less torque on the Mirrors transom.
Hey noel thanks for your company whilst in the Emerald Isle look forward to a catch-up in March and will definitely be back about sister sara. 
WE ALL LIKE PICS HERE 
:oops:I worked on the premise that the cavation plate should be level with the bottom of the hull. Except there's a keel here I'll see when I give it a test run,hopefully soon.