The O.S. 55AX is an RC aircraft engine.. has zero to do with any of this..
As for OEM props, that is just "another" brand and most engine manufacturers don't build their own prop anyway. I will respectfully disagree with OEM being the best prop for an application because they have no control over the boat you are putting it on. There are just many different designs and the only way to find what works best is test, then test some more, then try another. anything above roughly 20HP doesn't come with a prop-there's a really good reason for that. There is no perfect science to this, no perfect answer.. But I will say in my testing, I've been extremely impressed with the versatility of the solas designs. I've found repetitive results to be very acceptable with Solas. Iboats carries the full line of Solas and unless you are getting down to the gnats rear, you will get good performance with Solas as long as it's not a miss-application to start with..
