[AJD] 1st Tractor

[Ronald L. Cook]

Merle,
	I understand the "slower burn" of the higher octanes.  My posting had 
to do with my "overwintering" engines to prevent varnish, etc. that you 
find from aeromatic fuels.  These engines are not working.  Some don't 
even run until spring.  My 4020 works in the winter on the snow blower 
and loader.  It gets tractor gas.  My spray plane is the source of the 
av-gas.  Just drain some out and fuel the engines that are to sit. 
Works great, and in the spring, just gas 'em up and go.  20 plus years 
doing this.  No burned valves yet in anything other than the Franklin 
engine in my Stinson.  It doesn't get along with 100 octane unless 
operated at high revolutions and that bugger is timed at 32 degrees BTC! 
  But I sure wouldn't park it all winter with tractor gas in it.

Ron Cook
Salix, IA

Merle W. Johnson wrote:

> Ronald
> The lube part is fine.  One common misunderstanding is that higher octane
> fuel burns faster.  Just the opposite.  The higher the octane, the slower the
> burn to prvent detonation.  So, if not properly timed with enough spark
> advance to permit the combustion to take place in the cylinder, it is still
> burning when the exhaust valve opens and results in a burned exhaust valve.
> Merle
> 
> Ronald L. Cook wrote:
> 
> 
>>Why would it be hard on valves?  The valves should like the lead.  No
>>plugged up carburetors and no sooted up spark plugs as you get with the
>>crappy unleaded stuff nowadays.  Just pretty expensive.  Now over 3
>>bucks a gallon at the fuel truck.
>>
>>Ron Cook
>>Salix, IA
>>
>>Merle W. Johnson wrote:
>>
>>
>>>Humm!!!  Little hard on valves.
>>>Merle
>>>
>>>Ronald L. Cook wrote:
>>>
>>>
>>>
>>>>Robert M. Massengale wrote:
>>>>
>>>>
>>>>
>>>>>Dennis,
>>>>
>>>>I wonder how that "B" would do
>>>>
>>>>
>>>>>on 100 octane?
>>>>
>>>>Robert, I keep 100 octane in all my "overwintering" fuel tanks.  From
>>>>lawnmowers to airplanes.  Of course the pickups with the catalytic
>>>>converters don't get the leaded fuel but everything else does.  No need
>>>>for fuel stabilizers.  I don't have a "B", but my "A"s go for it just
>>>>fine.  Smells good when they are running, too.<g>
>>>>
>>>>Ron Cook
>>>>Salix, IA