16-footer Engine Mounting Height
Posted: Wed Sep 28, 2016 10:32 am
Hello All, This my first post here, and I'm a new whaler owner. Yes, one of those guys.
I have a--guessing because there is no hull ID number--a 1968 16-foot 7-inch custom Boston Whaler. I have a 1993 Johnson 70-HP engine installed. I work on smaller OMC motors, 70-HP and below. On another forum, I was given advice to install the motor "two-holes up." The motor came to me installed all the way down with the stern bracket resting atop the transom. In this position (all the way down), the motor had splash back and the boat porpoised at WOT when I trimmed up slightly to correct the splash back.
The folks from the other forum explained that traditional mounting height rules don't apply to Boston Whaler boatss. My experience is that the anti-ventilation plate typically should be mounted in parallel with the bottom most point of the vessel. I haven't had a chance to try the boat since remounting to the higher position (which is about 1.5-inch higher).
Any input andadvice is appreciated!
Thanks!
I have a--guessing because there is no hull ID number--a 1968 16-foot 7-inch custom Boston Whaler. I have a 1993 Johnson 70-HP engine installed. I work on smaller OMC motors, 70-HP and below. On another forum, I was given advice to install the motor "two-holes up." The motor came to me installed all the way down with the stern bracket resting atop the transom. In this position (all the way down), the motor had splash back and the boat porpoised at WOT when I trimmed up slightly to correct the splash back.
The folks from the other forum explained that traditional mounting height rules don't apply to Boston Whaler boatss. My experience is that the anti-ventilation plate typically should be mounted in parallel with the bottom most point of the vessel. I haven't had a chance to try the boat since remounting to the higher position (which is about 1.5-inch higher).
Any input andadvice is appreciated!
Thanks!