Originally Posted by Poly
Jonp, I'm not seeking a warranty on an engine (with or without Fins) so it would be bizarre to go and ask. As a general rule though I discount anything told to me by sales people either promising that something is or isn't covered / required. Now if the engineering department produced a document (although how they would know with dubrus' no drill ones I'm not sure). I'm not doubting they will refuse a warranty claim, I am just wondering if there is real basis to YOUR claim that fins exert undue wear on the mounting hardware.
Im surprised it's much of a new engine issue, since presumably new engines give you the chance to correctly spec the engine first time. Fins tend to be a solution to a compromise.
Since Dave has a used engine with probably no warranty it's all a little academic unless there is real evidence they harm the engine.
As I said right at the beginning the handling issues Ive had in fibre glass hulls wouldn't happen with a rib, a rib wont let you bury one side of the boat in side swell.
Checked both my Suzuki and Yamaha warranty books and both have a disclaimer that anything fitted to the engine which is not standard can void the warranty (this also includes the wrong pitch prop).
The bennett tabs Ive fitted to 3 of my boats all improved performance greatly across the board. Being able to put more pressure to one side of a glass boat (what Ive used them on) and stop proposing etc were a quick easy fix, they also made the boats feel like much bigger boats in rough sea handling.
With an engine that doesn't have electric trim I would be very cautious of what I put on it, at least the Bennett's have 3 different pressure settings. If the foil brings the nose of the boat down to much your only choice is to take it off and fill the holes. My rib handles badly with to much nose down trim.