Re:FAA approves unleaded fuel for piston fleet
by Gordonjcp on Friday September 02, 2022 @12:58PM
(#32693039)
Well, I know it's got oil mixed in. Presumably the leaded fuel requirement is only for four-strokes though, since two-strokes can't run on leaded?
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Re:FAA approves unleaded fuel for piston fleet
by jabl on Friday September 02, 2022 @02:35PM
(#32694272)
It's kind of an orthogonal issue. Oil is needed in the fuel for two-strokers with crankcase ventilation for lubrication. Lead is needed to boost octane. But your old outboard engine is most likely a very simple low compression engine that doesn't need particularly high octane, so can run just fine on regular car gasoline (preferably without ethanol, but again a slightly different issue) mixed with the two-stroke lubricating oil.
Re:FAA approves unleaded fuel for piston fleet
by Gordonjcp on Saturday September 03, 2022 @03:30AM
(#32699602)
I know how they work, I'm just wondering if 2-stroke aero engines get a pass from using leaded fuel since they run for about ten minutes before the lead fouls the plug.
Re:FAA approves unleaded fuel for piston fleet
by jabl on Tuesday September 06, 2022 @05:14AM
(#32734720)
> 2-stroke aero engines
Which 2-stroke aero engines are you thinking of?
> get a pass from using leaded fuel since they run for about ten minutes before the lead fouls the plug
Huh? Before unleaded automotive gasoline became the norm, all kinds of 2-stroke engines ran on leaded gasoline just fine.