Q: Paul, I read your brief discussion on narrow versus wide deck Lycoming O-360s. While this is true, my need is perhaps a bit different.

I am building a Velocity and am approaching the engine phase of the project. The Velocity is a pusher configuration and it’s generally recommended to use an IO-360 or equivalent engine.

I have found a nice mid-time engine IO-360-A1B6 wide deck (900 hrs SMOH, no prop strike and good compression). I certainly like the 200 hp, fuel injected engine, but want to know any drawbacks or advantages to standard IO-360s.

I have a mount I am told is for a Lycoming engine. I thought an O-235, then I am told O-320, but I see the O-320 lord points are angled, while mine are flat. Mount points are 9-1/2″ top to bottom and 11-1/2″ side to side.

Can you please tell me just what engine this fits?

Richard L. Jack

Q: I found a Lycoming O-320-H2AD in Germany for sale. I’m an Italian, I built a Storm, and I have to power it with a 150-160 hp Lycoming. I would like to use mogas and I don’t know if this model can do it.

Also, I know the O-320-H2AD had a series of problems with valves and tappets. Can you tell me something more and if it is worth buying?

And, lastly, is it designed to mount a variable pitch propeller?

Q: Our flying club is getting ready to have our engine rebuilt and some have asked about upgrading to 180 hp using an STC on the Lycoming O-320. Have there been any issues doing this and does the engine make it to TBO?

We currently have a Ram STC and a Power Flow Tuned Exhaust on it.