Although avgas is more stable than automotive gasoline, it has many disadvantages, including that it will cause the engine to run lean, which is very hard on the engine. Airplane engines operate with very specific parameters that are not at all the same as small, high reving yard equipment. Regular automotive pump gas with Sta-bil added to it remains stable for longer than avgas, and has none of the disadvantages.
CWM
I know a few people who discovered that the hard way when valves burned out in their car engines. That was in the days when there was little difference in price between avgas and mogas and they had access to it so they used it in their cars.
Also even though it is "low lead" it has considerably more lead than any automotive fuels ever had.
I also vote for Stabil and have used it for years.
Three out of four of Don's suggestions are spot on, and number 3 is especially important, but:
Don't drain the oil from the sump.
Next October / November, as you get it ready for the snow season, get it started and run it 10 or so minutes in neutral to get the oil hot.
Shut it down, drai the oil and refill with clean new lube oil of whatever grade the mfgr recommends.
To get it unn>
The very LAST thing you would want to do is wash off that wonderful coating of oil! That oil is all that stands between you and a scored cylinder and piston. The engine's normal lubrication system is not going to do much in the first few seconds after it starts. Any idea how much damage you can cause in 10-20 seconds of running with no oil on the cylinder walls?
CWM
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.