inverted four stroke
I have a four stroke OS FS-120S-E engine mounted inverted and despite many high and low needle adjustments, the engine has a rough idle, poor transition to high speed and tends to quit after a short idle time. It does however, run well above idle speed. I have been told that a hotter plug such as the Mccoy mc-14 plug will solve the problem. I am presently using the OS type F plug. The Mccoy 14 plugs seems almost impossible to find but will this solve my problem?
Bill