I have used jetcat mounts on many different engines. If jetcat's screws don't work, you can put a 4-40 of any length and associated washers and lock nuts and it works fine, I've done it on my kingcat using a jetcat P-120 mount on a merlin which is about a half inch larger can. Held up just fine to all the punishing I could give it.

The 4-40's clamp the mount to the engine.