TC 2-stroke oil in a small outboard?

Joined
May 2, 2018
Messages
306
Location
California
I have an old Johnson 3 hp outboard. I normally run TCW-3 oil in it's gas. I keep a gas can mixed with TC oil (air cooled 2 stroke engines) for my weed eater and leaf blower. The owners manuals for those state not to use marine water cooled (TCW-3) oil.

Is it OK to use TC oil mixed gas in the Johnson outboard which is water cooled?
 
Joined
Jul 12, 2012
Messages
5,939
Location
Caldwell Idaho
The differences is supposedly the deposits the oil leave behind, usually air cooled oils potentially will leave higher deposits on outboards but the issue is todays oil are very good.
 
Joined
Aug 20, 2003
Messages
18,163
Location
NE,Ohio
What is even odder is dual rated TC TCW-3 oils or the OPE that suggests TCW-3 in an air cooled engine.
 
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