Few years ago I put a 90 Mercury on an 18 Fiberglass Chincoteague Scow. At about 3500rpms the bow would start to porpose and if I tried to trim it down the bow would drop and it would begin to bow steer from side to side. I installed a Dolphin which allowed me better control over the trim of the boat and I could run the boat to 5500rpms no problem or slow it right down until it was barely on plane. It was stable all through it's rpm range. I guess you might say it stabilized the stern. Whatever, it paid off.
[Q]Thoroughbred originally wrote:
[Q]Bob H. originally wrote:
I use the SE Sport 300. Third brand I've tried on the same boat. The Sport seems to work well the last 2 years. I wish these folks would use a common bolt arrangement.
Do you have to drill to mount it?
They all require drilling to mount. Typically 1/4" holes.
I got on plane quicker, was able to plane at slower speeds, weathered modest chop and boat wakes with alot more smoothness. I think these fins are a great improvement. The big test will be with a loaded boat on a trip fishing in the bay.
It took 10 minutes to install and are alot cheaper than trim tabs.
Whatever you do, don't put them on twin OBs!! I've always had great luck with them on single motors but on twins, the steering wheel developed a mind of its own. I can only imagine what the boat looked like from the side on plane, there couldn't have been more than a few inches of hull in the water