"Mr Wizzard" wrote in message

Replace the plugs, and go with nothing more that 50:1
of the XD-25 oil available at Gi-Joes, and everywhe
http://parts.evinrude.com/info/parts/oil/oil.htm

OMC's XD-25 is more marketing hype than oil, perhaps it has an additive that
can stop the new E-techs from blowing up, but I doubt it. ANY good TCW-3
at 50/1 is fine for that older outboard.

Note that Mercury and OMC do not own a refinery.... thier oil is made to
specs by the LOWEST BIDDER.

-W