This is a reply to the last two posts. GOT GAS? My first run today was VERY PROMISING. Made change to carb, tried again, mixed new batch of XXX but left a little in glass cup to See if what I thought was happening actually was, CURSED the carb change, soldered the butterfly back to original shape, tried to start, considered a drop kick over the fence, looked at fuel sample, CURSED FUEL, made picture. etc. I'll get some "real gas" later.

As to the ST 51 Mutant, I like that! The short of is that I turned down the front of the engine and made a manifold for a Walbro to run gas. The manifold was not aluminum, but some unknown composite. It failed. I decided to put the stock carb back on so I cut a new adapter out of aluminum. I offset the carb for the "Coolness factor" and because I wanted to see if the carb mounted in a plane with the needle at tank center would make a difference. Kinda like side mounting an engine but this time only the carb. This is part of the "Muffler pressure with gas question". Tank center line etc. So far I think a long pressure tap with maybe an aluminum tube would cool any gas problem. Tygon will not handle the heat, so Silicone to aluminum? Ch ignition with Syncro spark as mentioned earlier on gas and 20% synthetic oil, the same fuel as the gas mag ignition evolution in a previous picture. That's the short version? The mount mess is the adaption of the ST mount to the Weedeater mount that was in there first.

the only ST pictures I have.