Engine ID?
 

I think this may be an A&M 2.2. What do you think? I measured the bore and stroke and it is approximately 2.2 cu in. If it is an A&M, does it have a Sachs-Dolmar crank or an A&M crank? How do I tell. It has excellent compression and what appears to be a C&H brown box ignition without the label. This afternoon I set up the timing for 28 degrees btdc and 0 degrees btdc at minimum throttle.

Any opinions, good or bad, will be appreciated.

RE: Engine ID?
 

Look in the hub, the end of an A&M crank will be smooth, the end of a Sachs crank will have a small hole in the center...Look at the con rod, a Sachs rod will be copper color, an A&M rod is aluminum or steel color with machining marks on the surface...A&M merely OK, Sachs great..
It will run the same either way, just way longer with the Sachs crank....

RE: Engine ID?
 

Thanks for the info Ralph. Obviously, from what you said, it is an A&M crank because it has no small hole in the center. See photo. No problem though, I inherited this engine so I think I'll see what it will do.

RE: Engine ID?
 

Yup, A&M....The smaller ones like yours had the least trouble...The A&M cranks are easier to bend, but that makes them easier to straighten...Should last a long time and run well..