I gotta raise it an inch

laser · #1 10-12-2003, 09:57 PM

I have a fixed jack plate on my 20 cc and I need to raise my 150 J about an inch. Of course I have maxed out the height of the jack plate! I was thinking a stainless plate with countersunk holes would do it but I don't know how thick it would have to be. Anybody have suggestions how to solve my problem? [img]images/icons/confused.gif[/img]

Bill
If one is good then 2 is better! [img]images/icons/grin.gif[/img]

JW-Tex · #2 10-13-2003, 12:43 PM

What if you flipped the entire manual jack plate upside down?

Also can you drill more mounting holes in the jack plate itself?

Just a couple of thoughts

JW

Fr. Frank · #3 10-14-2003, 06:14 PM

You need to be careful about height when mounting behind a 20'. One problem can be excessive porpoising caused by thrust distance from the hull rocker point. If you increase height, you will possibly need to increase mounting angle as well. Stock transom angle on the 20' is 14 degrees, I believe. Consider wedges if necessary. There's a 20' SF near me with a Merc 250 on a B Bracket, he had to go to 17 degrees, and has trimming difficulties still below 35 mph.

laser · #4 10-14-2003, 09:58 PM

My mechanic says I gotta go an inch but now I'm looking adding another bracket for a 10" setback. What do you guys think?
Bill

TUGBOAT · #5 10-15-2003, 12:55 PM

I pondered this idea for a LOOOONG time(bracket-setback),probably my longest setback of time (besides color) I was finally convinced that 20's were best left w/o a bracket.Over 20' w/o hesitation ! I now don't want to ride in a 20'r with a bracket just in case !! I love the way they Look ! [img]images/icons/cool.gif[/img]