I picked up a used YS 63FZ, and put it on my test stand today. After putting fuel in the tank, and turning it over several times by hand to pressurize the tank, I moved the throttle to an idle setting, hooked up the glow igniter, and by the time I went to spin the prop with my starter, fuel was running out of the carb. This is only my second YS engine (the other is a 91FZ), but I'm thinking it's a regulator problem. I released the tank pressure, poured the fuel out of the carb, and trying starting it, but raw fuel was spraying out of the exhaust.

Any suggestions?

Mike