Engine Mounting Hieght

[GWT192]

Has anyone played around with different engine mounting heights? I saw performance gains from people doing this on boats. I have a 1997 Tournament with a Yamaha 175 SSII. Anyone done this on a Tournament?

 

[onoahimahi]

I'm moving up one hole in the spring. Is your anti ventilation plate out of the water? Mine is but splashes when fully loaded. I made a video to have a look:

http://www.youtube.com/watch?v=9XBsCt_9bgc

I'm currently in the second hole from the top and was lightly loaded for the video.

Cheers,
-Scott

 

[VeroWing]

I did a lot of research on outboard height location when I rebuilt and changed dimensions on a Grady Seafarer transom. I also replaced a single outboard with twins. A "general rule of thumb" I kept finding was, the cavitation plate should be mounted even with hull bottom directly in front of it, AND, up 1" for every 1' outboard is mounted back from transom. I used this as a basis for my twin mount locations, and after experimenting both up and down from that starting point, found that the starting point worked the best for my application.