Please help prop my 200 merc Starflite

[StarfliteVT]

I could use some input. I've got a Starflite with a 200hp ob Merc (no EFI). The boat is about 21 ft long.
I've got a prop on it that appears to be a Merc prop. The number reads "48 89856 A4 22P"
I'm new to the prop world. But this prop looks odd compared to other props I have seen on similar motors. I'll try to use some technical terms, maybe I'll impress someone. The outer Hub appears to be rather small in diameter - and therefor the exhaust port is as well. Most of the props I've seen on 200 mercs seem to match the hub diamter to the bubbled out area on the bottom of motor where the shaft goes in. (follow me?)
In any case. How can I reference what my prop belongs on? Or what my motor can handle (motor: OT273140//1200412YD) Does anyone have a Starflite with a 200 hp outboard? If so, what do you use for a prop?
Right now I can get out of the hole pretty well with 2 people onboard. With 2 people it sounds like it cavitates and it's very tricky at best to plane. The boat seems to cavitate and then grab hold and launch as the nose starts to come down a little. Tops out at about 64MPH usually.
The the former owner is deceased,,, so I can't ask him if he knew what he was doing.
Please feel free to respond to: goodsir1322@yahoo.com THANK YOU.

[StarfliteVT]

I could use some input. I've got a Starflite with a 200hp ob Merc (no EFI). The boat is about 21 ft long.
I've got a prop on it that appears to be a Merc prop. The number reads "48 89856 A4 22P"
I'm new to the prop world. But this prop looks odd compared to other props I have seen on similar motors. I'll try to use some technical terms, maybe I'll impress someone. The outer Hub appears to be rather small in diameter - and therefor the exhaust port is as well. Most of the props I've seen on 200 mercs seem to match the hub diamter to the bubbled out area on the bottom of motor where the shaft goes in. (follow me?)
In any case. How can I reference what my prop belongs on? Or what my motor can handle (motor: OT273140//1200412YD) Does anyone have a Starflite with a 200 hp outboard? If so, what do you use for a prop?
Right now I can get out of the hole pretty well with 2 people onboard. With 2 people it sounds like it cavitates and it's very tricky at best to plane. The boat seems to cavitate and then grab hold and launch as the nose starts to come down a little. Tops out at about 64MPH usually.
The the former owner is deceased,,, so I can't ask him if he knew what he was doing.
Please feel free to respond to: goodsir1322@yahoo.com THANK YOU.

[175checkmate]

Sounds like a you have a small hub chopper I think.
There are some added benifits with the overthe hub prop. This allows some of the exhaust to pass accross the outer blade of the prop. This tends to free up the prop allowing the engine to wind up into the power band. The down side is cavitation on the hole shot. They work great on small light boats.
The larger hub you mentioned will pass the exhaust through the center on the hub keeping the exhaust away from the blade area.