O.S. F Plug

[patterndude at attbi.com]

Kevin,
A number of OS140RX users call Tower Hobbies and buy extra head gaskets to 
lower the compression a bit.  This can make a balky engine a pussycat, if you 
are having that problem.  I fly with some of these guys and their engines run 
great, but so does mine and I don't have the extra gaskets.
  The reason for the OSF plug is that, since it is a 4 stroke plug designed to 
hold its heat through the exhaust cycle, people believe that it can stay lit 
better than a 2 stroke plug.  this is like having an onboard glow in a way.  
It will help idle and transition.
  By my experience, I used the OS recommended A3 plug and the engine ran OK.  
These were my first 2 plugs, then I switched to the OSF.  I think the claims 
are true, but it is a subtle effect.  Engine runs great so I don't mess with 
it now.

--Lance
> I was just wondering, why do we use a 4-stroke plug in the 2-strokes? Does this 
> cause greater compression? I have trouble starting my 1.40RX due to the high 
> compression. I've used every starter available and nothing works but my chicken 
> stick! I've used a Kavan with 14.4 Volts and that won't do it either.
> 
> Kevin Duncan
> duncanbp at msn.com
> 
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