GC wrote:
So you think I would be safe using Premium Unleaded (the highest octane
petrol available in AUST) plus my standard mixture of Two Stroke oil?
Would I have to drain out my existing tank completly before mixing the
leaded petrol with the Unleaded?

I have been using unleaded regular fuel in an old Evinrude outboard for
many years, when leaded regular was no longer available I simply added
unleaded to the tank. No problems.
There is no harm in using premium unleaded, but does your motor need
that octane rating?

Lead is there to protect the valve seats in 4 stroke engines.
2 strokes don't require lead, so unleaded is fine, probably have to retard
the ignition slightly.

"Short Wave Sportfishing" wrote in message
...
On Mon, 8 Nov 2004 18:52:06 +1100, "GC"
wrote:

So you think I would be safe using Premium Unleaded (the highest octane
petrol available in AUST) plus my standard mixture of Two Stroke oil?
Would I have to drain out my existing tank completly before mixing the
leaded petrol with the Unleaded?

Yes - for that old an engine, you shouldn't have a problem. You might
want to use a good premium 2 stroke oil.

Also sorry to be abrupt but the same thing happened when I did another
post
elsewhere... people started telling me about their old car engines running
fine on Unleaded, I was hoping I would only get boat related answers in
this
newsgroup :)

Well, some of us have significant experience in that area and it does
relate in a few ways. The question was about additives and that's
some of the answers you received. The fact that the answer related to
Redline was more than appropriate.

TTFN,

Tom

"Bodies are for hookers and fat people."
Bender - "Futurama"

"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.

Depends on the compression.
All the manufacturers recommended using premium fuel when leaded went away
to help prevent detonation.

--
Tony
my boats and cars at http://t.thomas.home.mchsi.com
"John Wentworth" wrote in message
...
GC wrote:
So you think I would be safe using Premium Unleaded (the highest octane
petrol available in AUST) plus my standard mixture of Two Stroke oil?
Would I have to drain out my existing tank completly before mixing the
leaded petrol with the Unleaded?

I have been using unleaded regular fuel in an old Evinrude outboard for
many years, when leaded regular was no longer available I simply added
unleaded to the tank. No problems.
There is no harm in using premium unleaded, but does your motor need that
octane rating?

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.