| Author | Message | ||
     Scott Corder Moderator Username: Scott_corder Post Number: 10 Registered: 01-2005 Rating: N/A |
I am finding these recent posts very informative! I don't have much to add but want to reiterate something I posted a long time ago (a copy/paste of that follows): If you read a post I made much earlier in this same thread on the bulletin board, I mentioned some very strict advice I received from Martec concerning matching prop pitch to the gearbox on the engine. To reiterate: Martec was adamant that the prop be properly matched to each specific Yanmar gearbox to generate maximum thrust at approx 2900 rpm. Anything different and they said bad things could (would) happen (clutch burn out, engine damage, etc.) They also indicated that Yanmar shipped 2GMs with several different gearboxes on a totally unpredictable basis (just whatever gearbox they happened to have on the shelf as they made each engine). This, they said, obviously prevented them from providing any kind of widely applicable formula for prop size and pitch on a Yanmar 2GM. +++ This being said, recent findings seeem valuable but we should remain mindful of the gearbox issues. |
