Hemi head, how about hemi piston for the 2mm? The harley guys stroke engines by welding the crank pin on one side. Do it wrong and you destroke.
Lawnmowers are known to be splash lubed successfully, mines 20 years old. My airplane engine was demonstrated and certified to run at least 30 minutes on reduced power with no oil pressure.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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