zdog

As the previous owner I also experienced this. My IA and 2 others explained to me that the fuel injection system for this engine is very primitive. Not much more sophisticated than a water pistol. I was told I could spend lots of money and not get a much better result. Under heavy loads it ran fine. The champion fine wires seemed to aggravate this. They appeared to be very sensitive to having the perfect fuel mixture. I also had the same experience with fine wire plugs in my Charlie.

i own this airplane. the engine was renewed using lycoming parts. new cylinders, pistons, rings no aftermarket parts. this is the second time this stc has been in this airplane. this engine went through the break in period of 25 hours with only 1 qt of oil added and it was still at 8 qts at time of drain. looks like the engine rebuild was successful. since the oil change to exxon elite it has required no oil added. i have spent the money to bring this airplane up to a no squaks condition. far from the condition it was in when i aquired it. the engine was torn down for inspection because it required 3 qts of oil in the last 5 hours i flew it. the oil analysis show it was making lots of iron and chrome. upon inspection it was discovered someone had been into the engine off book and had spun a ball hone in the upper part of all of the cylinders, possibly in an attempt to reseat the rings that had collapsed probably from running the engine too hot. XG has demonstrated gound speeds in excess of 200 mph in level flight since the overhaul. it burns no more fuel than before with increased speeds or, less fuel at the standard engine speeds. the new radios were installed by el paso aero the installation has a very finished and professional result. if you have priced this equipment you know thge cost. if you have questions you may call me 432-682-6947