It does not leak. I made up some plates to cover the intake and exhaust ports. I fitted one with a shrader valve. I pressurized the case and jug to 50 psi. I have zero bubbles when I submerge the whole thing in a bucket of water.

The muffler is the bottom of an aluminum gas cylinder. It was machined up all pretty. It has a round disk with a step on it that bolts to the engine. One bolt holds the disk to the can. The can has a hole in it to let the exhaust out. I stole the idea from somone who makes such a "puck" muffler for Ryobis. It is not blocked. I increased the size of the hole until I got full RPM.

I am thinking of maching an intake manifold out of aluminum bar stock. At least I will know everything is tidy and right. The old plastic unit is a bit grungy.


Any more ideas??