I have an MVVS .91 glow engine that came with a diesel head and a carb for diesel use. I currently have it listed for sale. However, I can't find any information about the MVVS diesel .91. I have found some old advertisements for the MVVS .61 diesel parts.

Can someone confirm that there was a glow/diesel option on the .91, or is this a .61 diesel head with the optional carb?

P.S. the engine has the red badge on the left side with the number "15", so it is a .91 size engine.