Re: Any PSC37s with 4-blade Variprops out there?
We too ordered a Variprop DF-107 4 blade prop for our 1998 PSC 37 & had it installed this summer in Maine. The prop has a massive hub & is well engineered well. As new owners we didn't have any experience with the existing 2 blade 18" prop & the Variprop went on before we launched. The prop install was part of our refit that included adding a PSS dripless shaft seal, new engine mounts & a new cutlass bearing. So the Yanmar JH2E was lifted & the propeller shaft removed to be cut down & re-keyed. The shaft was shortened about 1.875" and the goal was install the new prop so that it could be removed in the future in case of damage without pulling the engine or rudder. The prop aperture was ground back about .75" where the cutlass bearing is so we could also install a Spurs Line Cutter.
The performance under forward & reverse is exceptional & there seems to be minimal prop walk. The max rpm in forward is 3450 but we didn't have all our instruments working to get speed data to know definitively the max boat speed.