Could anyone advise me on the construction of the rest of the exhaust for the engine pictured below. 2hp, 1911-1914. Judging by the amount of damage to piston and conrod it seems to have locked up hydraulically either by taking in water back up through the exhaust or through the carb. I presume the venturi effect draws the coolant through the engine as there no provision for a fixed coolant pump. The coolant joins the exhaust at the base of the muffler and exits through a 1/2" pipe. I am quessing after a short distance of 1/2" pipe, the exhaust should go into a larger diameter pipe (vented to atmosphere) and also over a verticle horse-shoe bend so as to prevent water being sucked back up the pipe on engine over-run. I won't be putting it in a boat, but would like to show it with the exhaust pumping out coolant. Does the coolant supply need a non-return valve on the inlet to stop all the coolant draining back out of the engine when the engine stops?
