bowbell

Just picked up Zenoah Twin airplane engine at an estate sale. Seems to be in great shape.
How can I tell what size it is 74 0r 80?



Thanks

Truckracer

My Feedback: (19)

As far as I know, the GT-80 had a black colored intake manifold where the 445 had plain aluminum. Other than that, there are some minor differences in the cylinders .... especially the fins near the spark plugs. I don't have my engines here to look at to tell you the differences .... if no answers, I will respond later on with more details. I've flown both and the GT-80 only had a bit more power than the 445. Both ran well and were smooth performers at any speed above an idle. They hammer a bit at idle due to the to having a mag with the ignition advanced all the time. Convert to electronic ignition and enjoy one of the smoothest engines around from idle to full throttle!

Truckracer

My Feedback: (19)

OK, I remembered the differences in the cylinders. The GT-80 has 3 small cooling fins on top of the heads near the spark plug where the 445 has none.

bowbell

Thanks Truckracer.

My engine has the three fins on top of the heads and a black manifold, so it looks like an 80.
Thanks again for your speedy answer.