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  What is the best Manual Jackplate for a 16'7" Hull

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Author Topic:   What is the best Manual Jackplate for a 16'7" Hull
NHKatama posted 04-09-2003 11:19 PM ET (US)   Profile for NHKatama   Send Email to NHKatama  
Hello all. Well my Katama goes to the engine shop in 2 weeks to get the new 2003 Merc 90hp 2 Stroke mounted.

I decided after reading many good threads here, that I should mount it on a manual Jackplate. I like two different models offered. One is the Cook (CMC) one-piece Manual Jackplate model # 65012 which has a turnscrew on both the top and bottom to adjust the height up and down. This unit weighs around 38lbs.

The other is a T&H Hi Jacker which is a two piece unit model # JP-1A This unit has two jack screws one on each side to adjust up and down. This unit only weighs 19 lbs.
Both of these Jack plates have 6" of set back.

The main reason that I am installing a Jackplate is for better hole shot, better performance, and Better rough water ride, my boat is a pre smirk (1972). It is my understanding that once I get the boat fine tuned I will not have to change the height very often.

So the question is, should I go for the lighter plate which will be a little harder to adjust, or should I go for the one with a center jackscrew, which is easier but twice as heavy. I hope to hear from those of you that have experience with these two units as to which way you would go.

Thanks all, for your feedback.
Blue skys to all ! ~~~~Pete

Bigshot posted 04-10-2003 10:46 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I have the twin screw and love it. I adjusted it 3 times to get the height I want and have not touched it in over a year. I doubt you will either.
scotts152001 posted 04-12-2003 08:46 PM ET (US)     Profile for scotts152001  Send Email to scotts152001     
I just listed a 6" manual J&B Industries jack plate on ebay. For info on it, check out
rb posted 04-12-2003 09:24 PM ET (US)     Profile for rb  Send Email to rb     
You might also want to look at
dogfish2 posted 04-15-2003 06:34 PM ET (US)     Profile for dogfish2  Send Email to dogfish2     
Bigshot: what kind of difference did the jackplate make as far as performance, more speed, more rpm's, beter ride? Doesn't seem like a bad idea, except that it would add more weight to transom. Thanks for your reply.
Bigshot posted 04-16-2003 09:25 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I draw 4" less, that is all I care about. As for performance MAYBE 1mph faster MPG may be a tad better due to less drag. Now with a 90 or 115 you will see more of a performance increase.
lhg posted 04-17-2003 06:15 PM ET (US)     Profile for lhg    
I would definitely get a one-piece unit, with the center threaded shaft. I like the Rite-Hite model carried by Bass Pro and Cabela's, in shiny gloss black. This will go nicely with your engine. I would NOT get the Cook unit, as it was really designed to contain hydraulics, and is too wide and bulky looking on the boat, and is in raw aluminum color. The Rite Hite is a much trimmer looking installation, considerably narrower, and matches the engine.

Springfield Marine also made a nice looking unit, and I have these on my Whaler (see Reference section article). But I am not sure they are still made. You might try contacting them. It is a substantial unit, of 1/2" aluminum plate, silver anodized.

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