OK - I've got one of those (the engine).
Damned good and most forgiving if just about all maintenance omissions.
As to the muffler - You don't need one - really!
A straight piece of pipe to get the exhaust out of your way is sufficient.
There is a lot more noise from the head than the exhause pipe. Try it - you
will see what I mean.
Don't worry about the fuel return - just run a tube back to the tank fron
the 'spill' line on the engine.
When you start it up be aware that there is a fuel shut off solenoid that
may be stuck the same as the starter pull-in. Same fix as what you did to
the starter. Also make sure the governor linkages are free to move.
If it doesn't want to start do not use starter fluid - good way to blow the
head gasket or the entire head. Trick I use is to dribble a little motor oil
(teaspoon) into the air intake (air box cover and filter off). Hit the
pre-heat until the oil on the heater coil ignites and then hit the starter.
If I recall correctly (it has been a long time since I had mine running) the
fuel system is pretty much self-bleeding.
It is one tough engine - I have had mine running on fuel that had sat around
for ten years!
Good luck.
Ken.


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