"Apparently water cooled outboard oil can not take the heat in a chainsaw. " OB oil is TC-W3 rated these days: TC= 2 cycle (stroke) and W = watercraft. the 3 is just the 3rd iteration of the spec. I think you hit upon the problem being temperature as the CS is air cooled. Also I have started to run my newly purchased saw and weed whackers at 50% higher oil ratio than recommended even though I use the best CS oil I can buy.
Seems the single or double ring alum on alum WW and CS engines need more lube to keep the alum from wearing away, or I have been experiencing the above mentioned problem with storage, since they don't have cast iron liners for the cast iron rings. I do use 3 types of "snake oils" in the gas mix to assist in storage protection. Just last season I trashed the old after attempted ring replacements and other problems with the old and bought new. Course I had an ulterior motive: Easy starting options with the new and everything else was wearing out with the old too so why not upgrade.
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