Carburettor

 Progress came to a stop as while I drove the engine on the bed of my mill by belt large amounts of oil was pumped to the top of the cylinders.The engine was completely dismantled.The cause of the problem was the piston skirts protruded 7mm below the bottom of the sleeves. I reduced the pistons by 7mm and installed oil rings on the bottom of the skirts.


This image shows the support for the air intake and air cleaner brackets  which were cut from brass using CNC.

The two halves were silver soldered together and shaped with file and Dremel .The butterfly was machined from 303 stainless. This is the bottom section of the carburettor and would normally be the choke

 The block above this section would normally be the float chamber and throttle valve.
Initially I will attempt to run the engine on petrol gas using this butterfly as the throttle and use the air cleaner to vapourise the fuel,