Dave
I have a 140S that I can,t get to run correctly. The engine won't start or run under half throttle. When it does start it will surge bad for a short while slow down and quit. If you try to throttle up or down it will quit. The engine will be very hot after a 60 second or so run attempt.

I am using Powermaster 20/20 fuel, APC 16-10, the regulator is flush, High speed needle has been from 1.5 to 3 turns out, low speed out 1.5 turns. The check valve is in working order and filter is new. the tank does pressurize and hold it.

This engine has been stored for around a year.

Any help will be greatly appreciated
Dowayne

Likely the regulator is stuck from the year of storage. Remove it, clean it, and put it back on the same way it came off. Make sure you take it completely apart.

Then go to www.ysperformance.com and follow the running instructions.