RE: OS 46fx Glow plug problems
9X10 is way too much prop, try a 9X8 as others have said. Try a Fox standard long plug, it's a bit cooler than an OS #8 but it's Cheeeaaap and it Laaaast is some engines. I still use OS #8 plug on other screemers. Make shure your tank is supported/wraped in foam rubber and not in contact with the fuselage, you may be foaming up your fuel. Do you have a lot black smutt from your exhaust....your lean, for the reasons Bob stated.