Originally Posted by Art
I've been a power boat owner/enjoyer for most of my life. So far never used [nor apparently needed] a spacer/vibration-limiter.
Have heard of some problems and also of successes regarding these.
What I'd like to see is a detailed video during use; and, importantly at different [especially continuously higher] rpm.
From your experiences, do you feel these units will last at higher rpm?
I am not qualified to opine on how well a Drivesaver works at high RPM. I do know that they are spec'd to the engine HP, torque, and weight of the boat. A video of one in operation won't help you. All you will see is a spinñing assembly. As for their usefulness, I think they serve no purpose. See my earlier post on my experiences. Some folks have reported a bit of vibration dampening. If your engines are aligned well and your shafts are straight, in my opinion, you do not need a Drivesaver. Supposedly they save an engine when propellers strike a solid object by means of the rubber coupling fracturing but in, Steve D'Antinio's experience, this benefit is rare if non-existent. Plus, aligning an engine with more precision is made more difficult when using a Drivesaver. I eliminated mine with a nicely machined exact duplicate from Spurs, the line cutter company.