Bob's Manual jackplate on 1970 20' w/ 200 HPDI

fdcityronco · #1 01-20-2006, 10:50 PM

Originally I had a bracket w/ closed transom and a Johnson 150. After my motor caught on fire at the beach a searched for a new engine and found a deal on a Yami 200 HPDI. Problem was it's a 25 in shaft and thinking that's what I needed I bought it. After it's maiden voyage I realized it was way to low, so I got a Bob's jackplate-manual and raised the motor it fixed the problem except now I get a little bow hop. The jackplate can be mounted two way's one with a 5 1/2" set back w/ 6 or -6 degree wedge and the second way is with a 2 1/2" setback and no wedge. Thinking I want to keep the motor as close to the transom as possible I mounted it with the 2 1/2" setback, but I have bow hop. Now the question, Will it make that much more of a difference if I flip it around and mount it w/ 5 1/2" set back so that I can get a wedge to be able to trim the motor down more? Will this even help with the bow hop? Any comments towards this matter would be greatly appreciated!
Thanks

Bigshrimpin · #2 01-21-2006, 03:50 AM

HUGE trim tabs, a mercury mirage prop, and a few sand bags in the front fish box [img]/images/graemlins/smile.gif[/img]

Michael Vezzosi · #3 01-21-2006, 04:49 PM

I have the same jack plate mounted on a 15' Whaler, using the 6" wedge. Have similar porpoising. Only solution I have found is a FULL cooler in front of the forward thwart. Friend with identical hull and engine minus the jack loves his setup. Same props, mine is hitting the rev. limitor at 6100 rpms, and I believe his WOT is more like 5700, which is recommended. I guess cleaner water, and really jacked, I'm in the market for a higher performance prop. Try shifting as much weight forward as possible. Notice more rev.s to stay on plane? Vezo, Part II.

Briguy · #4 01-23-2006, 01:19 PM

Many on the board here prefer bennett tabs but I like lenco's. Tabs will solve you problem for sure. Also a cheep bandaid solution may be a dolefin. It worked like night and day on my old 20' Robalo with a 200 Suzi on it. The boat was unmanageable without it and at the time, I had no $$$$$ for tabs. I have a dolefin you can try if you want.