On an O-320, the 2 in D2A generally means it is a solid crank engine. A one designates a hollow crank with engine provisions for a prop gov. A 3 means hollow crank for lighter weight, but no provision for a prop gov. (a lot of these were used on Piper Cherokee Warriors)
The D means high compression ( 8.5:1 / 160 HP)
Thanks, that's what I had suspected. I think this means I don't have to worry about any plugs when I install my FP prop. But how can I tell for sure if my crankshaft is solid, by looking at it? I don't see any obvious "plug" on the front...
