There has been some discussion on our Tartan 27 group about switching to 100LL/Avgas, especially now with the proposal of an E-15 Mogas formulation.
I seem to remember that there used to be a formulation of Avgas without TEL.
Does anyone run 100LL or the TEL free equivalent and if so have you found any problems, IE plug fouling or cooler running temp. Did you switch plugs or change thermostats or is the temp reduction created by running higher octane insignificant? Does 100LL cause rough idling and would the carb. need re-jetting or adjusting?
I ran regular gas last season with MMO and ethanol treatment and the engine did run okay but I noticed at the end of the season that the rubber gasket on the sediment bowl had swollen to the point I could not re-use it. I drained the racor filter as well as replacing the element several times during the season and each time found both evidence of moisture as well as a fair amount of crud. I also have an in-line filter after the fuel pump and that seemed to have some kind of sludge build up in it... I also found evidence of build up in the sediment bowl during mid-season inspection. I really feel that using E-10 and especially higher blends in marine fuel is not appropriate...
Thanks for all the great insight!
Rich Shearley
I seem to remember that there used to be a formulation of Avgas without TEL.
Does anyone run 100LL or the TEL free equivalent and if so have you found any problems, IE plug fouling or cooler running temp. Did you switch plugs or change thermostats or is the temp reduction created by running higher octane insignificant? Does 100LL cause rough idling and would the carb. need re-jetting or adjusting?
I ran regular gas last season with MMO and ethanol treatment and the engine did run okay but I noticed at the end of the season that the rubber gasket on the sediment bowl had swollen to the point I could not re-use it. I drained the racor filter as well as replacing the element several times during the season and each time found both evidence of moisture as well as a fair amount of crud. I also have an in-line filter after the fuel pump and that seemed to have some kind of sludge build up in it... I also found evidence of build up in the sediment bowl during mid-season inspection. I really feel that using E-10 and especially higher blends in marine fuel is not appropriate...
Thanks for all the great insight!
Rich Shearley
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