OregonMaule wrote:... My O 540 has the Peterson STC. 2 electric fuel pumps besides the engine driven one. Engine driven pump has a scoop and scat tube directed in the pump. Scoop to the gascolator. One electric pump runs all the time the engine is on. The 2nd pump is turned on by a switch during TO and landing. A very detailed operation manual for most scenarios you may encounter. ............
The Petersen website sez the mogas stc for the lycoming powered maules are available from Ray Maule. Does petersen own the stc & ray maule sells/controls it? Apparently the mogas stc for at least some of the cherokee models is similar to the maule stc-- extra fuel pumps, etc.
What did that stc cost, with the extra pumps etc, and what was the installation time? Normally a mogas stc costs $1.50/horsepower & installation costs are minimal-- paperwork, placards for the engine & airframe, & checking to make sure a plastic carb float is not installed.
Yes Petersen has an stc for the IO-470 Cont, it even looks like it is for 87 octane, but it looks like that's the only injected engine-- no IO-360 Lyc, no IO-360 Cont, no IO-540 Lyc, no IO-520or 550 Cont. No 220 Franklin either.
BTW EAA only holds 87 octane (low compression) mogas stc's, EAA has both low-comp (87 octane) & hi-comp (91 octane) stc's.
A guy named Blue Leader from the 170 site (may have been on here also?) used to swear by mogas for his IO-360 powered C170, claimed he never had a problem. I think he wrecked it but don't believe that had much to do with the fuel.