If the pump and regulator are working properly, i.e., not gummed up from a previous run and allowed fuel to gel, you do not need a choke. If the pump/regulator has gelled fuel in it, the only way to go is to run it until it cleans up, or replace them. I'm for running it until it cleans up and returns to normal.

Put some prime into the cylinder by putting fuel into the muffler and then turning the engine over backwards by hand with the glow plug power disconnected, of course. Once you have fuel in the cylinder, the engine should start easily and the extra vacuum on the carb should pull the fuel through the pump/regulator assembly. It will probably run rough and require you to open up the main needle valve. Let it run until it gets warmed up thoroughly. After a while, the heat from running and the flow of fuel through the parts will wear away the accumulation and things should return to normal.

Also check your glow plug. You need an OS Type F plug in there in excellent condition.

Good luck and tell us how you fare.



Ed Cregger