Premium causing more deposits. Never heard that one. I have run premium in
all my outboards for years. Never had an engine problem w/ carbs gumming up
or anything and all my engines are very clean.
While true that running more octane than required will not produce more hp,
it does not hurt the engine. It will also help from the point of view of
storage and octane loss due to storage.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com
"SamW" wrote in message
news:eENjd.3058$mL1.1139@trnddc08...

"John Wentworth" wrote in message
...

There is no harm in using premium unleaded, but does your motor need
that octane rating?

There is a possible harm in using premium. The additional additives in the
premium can cause more deposits as compared to regular unleaded. You
should
only use fuel with the octane rating recommended by the manufacturer,
leaded
or not. Using fuel with an octane rating higher than required in a 2
stroke
will also reduce the horsepower of the motor.