He did all the usual Redbeer'd Guhrawge upgrades to the 212 but the engine was only able to rev to 3600, no higher. Tis probably due to hydrodynamics of the impeller and the consistency of water. If you ask me though, that's a nice safety margin.
Wonder if the powerplant assembly can be made much shorter and more compact? As it is it takes up a lot of interior room for muh tackle boxes and muh fishin' poles!