over-thru prop hubs - what's the hub diameter (Powertech TRO4)

[rdownes]

What's the hub diameter of an over/thru hub prop, and if brand matters, I'm referring to a Powertech TRO4. I thinks these are 4" but am not sure.

[rdownes]

Nobody? I've got a query into Powertech - no response so far.

[Jerhomes]

13.75" dia. like you said on the larger v6 case it acts as a over & thru hub. but merc does offer a blow out ring that will seal the gap between the gearcase & hub. this prop is a merc trophy copy, i was satisfied with mine a 25p on a 3.3 225 vmax. went to a 26p bravo one for extra stern lift for this heavy motor.
TRO4 is small hub, Bravo 1 is large hub.

[rdownes]

Thank you sir!