Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: 70Rcode on January 09, 2020, 05:59:07 pm
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Hi all, this Silver M90/ET1 being my 1st gas engine with Rubber piston O-rings, what is best fuel mix ratio & direct applied Lubricants for the O-rings, cylinder, piston skirt, piston pin & small end connecting rod bushing ? I'm currently using Colemam camp fuel mixed about 75:1 with an ashless, Low smoke 2-stroke marine
engine oil in the gas tank but how best to Lubricate those critical upper engine parts ? About every 15 short runs, i stand the engine on it's cylinder head end & with piston at 1/2 stroke, i fill the piston backside cylinder with about 1/4" of 5w-30 auto engine oil & holding exhaust valve slightly open, slowly run the piston thru it's stroke a few times using paper napkins to absorbe the excess expended oil. Is this correct or is there a better method to help insure best engine lifespan ? Thx, tom.