Squander Bucks is a 38 ft twin diesel power boat
. I installed Drivesavers on it back in 1999 or 2000. Twice they have saved my transmission
. The first instance was returning from offshore
through St. Lucie Inlet near Stuart Florida
which has shifting bars along the channel. Hugging the Eastern edge during a high traffic time I hit bottom at 20 mph with the starboard prop. The Drivesaver worked as designed and the shaft was not bent and the transmission survived without any damage.
Second time was in 2004 when approaching Freeport Bahamas
in about 3000 ft of water
at full cruise
of 23 mph and hit a submerged shipping
crate directly off the mouth of the commercial
port. Sounded like a bomb went off. In this case the shaft was not bent but prop needed pretty extensive work
. The transmission gears and seals
were ok but the auxillary mounted pump
did get hit by a piece of the shrapnel from the exploding Drivesaver and had to be replaced. Also the engine had to be re-aligned as the engine was shifted in the bunks.
I carry a spare Drivesaver on board and had my local machine shop make up an aluminum
"blank" that could be bolted in place to allow motoring home at a slow pace if needed.
Have not found that they do much for alignment purposes. Tried it both ways but now check alignment with Drivesaver off the put it back on before completing the alignment process.
Definitely in favor of these or at least something like it .