Jim wrote:
"Guys,Do these new/old Enya engines require high castor fuel?
Thanks, Jim"
Although this might be better placed in the "engine" section, I will add my 2 cents.
Here in the northeast, we are running a variety of older engines using Powermaster 10-22 or Brodak 10-23, both having 50/50 castor/synthetic. Engines like older ENYAs, OSs, Coxs, K&Bs and of course the good old Fox .35. Ringed, lapped, ABC, ABN, AAN, AAC - you name it.
Some of the engines that I personally run include my OK Cub .049, a K&B .09, some Fox .35s and of course my Atwood Triumph .49. They ALL get the same castor/synthetic blend.
Countless people have told me that one MUST run as high as 30% ALL CASTOR or the engines would be ruined. Countless people were wrong.
All my engines still run flawlessly with no sign of lubricant related wear.
I experienced one major glow engine failure in the last ten years - a Surpass .40 that I bought used and then ran for years. The crankpin broke but there was NO SIGN of the usual lubricant related failure issues.
I bought a very old Fox .35 that was not only well used but covered in baked-on castor oil. Even the exhaust port was partially blocked and the piston was black. As an experiment, I started running it on the Powermaster blend. It started out marginal and after around ten tanks of fuel became one of my best running Foxes. The outside still looks the same but the deposits burned out of the exhaust port and the piston color actually lightend up.
Bob Z.