Who knows what this engine is?

[Robert McHam]

This should be easy!
I think I know who will answer first.

Robert

[Marvin Denny]

  Looks like an old blue head (RC) Mccoy that has been black oxided on the case and gold anodize on the head with a CL venturi fitted.
  I know that probably ain't that, but I couldn't help myself--- just look at it.

  Bigiron

[Bill Gruby]

  If it is what I think it is it has been converted to "Glow" It looks like a "Black Knight .25" Just an educated guess.  LOL

  "Billy G"

[De Hill]

Marvin is correct.

[wmiii]

  Looks like an old blue head (RC) Mccoy that has been black oxided on the case and gold anodize on the head with a CL venturi fitted.
  I know that probably ain't that, but I couldn't help myself--- just look at it.

  Bigiron

[Bill Gruby]

 De Hill
  Thank you for the correction. After looking much closer the head fins are a dead give away. It is a redressed McCoy as Marvin says. My appologies Marvin.

  "Billy G"

[Marvin Denny]

  No apology necessary Bill.  I was basing my observations on the square lugs  on the front of the case and the flats along the side of the old portion of the venturi.  It could have been easier if they had shown the top of the head.

  Bigiron