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Author Topic:   Jackplate / setback for an 18'
peteinsf posted 04-10-2002 03:12 PM ET (US)   Profile for peteinsf  
I am going to put a jackplate or setback bracket on the Raider 18. My web searching yielded quite a few manufactures of jackplates and they all make similar claims.

I needed some recommendations from the group for the best offset distance, manufacture and if it is worth the effort & weight for an hydraulic model. Plus any thing I did think of...

Here are some of my finds:


Chap posted 04-10-2002 03:47 PM ET (US)     Profile for Chap  Send Email to Chap     
I have no experience with jackplates other than being on boats with them.
My friend just had a new F140 Suzi and a Bob's installed on his non-Whaler and loved the setup until he submerged the Bob's plate(reason=non-Whaler). It was not waterproof as I think CMC claims they are. Some kind of cap or something required a breather(not quite sure) and his hydraulic system was compromised and ruined by water intrusion.
Something to research. Good luck.
peteinsf posted 04-10-2002 03:58 PM ET (US)     Profile for peteinsf    
Some more...

hauptjm posted 04-10-2002 04:30 PM ET (US)     Profile for hauptjm    

Do you want a jackplate or a setback? If you're not going to be adjusting the height as you use the boat, you can simplify things with a setback bracket. Personally, I use an Armstrong bracket on my 18OR. Mine's a little unusual (see Cetacea 24).

For a normal fitting, the short distance setback brackets from Stainless Marine are very high quality. I'd put them close or even with Armstrong.

peteinsf posted 04-10-2002 04:42 PM ET (US)     Profile for peteinsf    

Very nice full transom craft! For my setup I was looking for something subtle. Your Armstrong unit is in the whaler drive category! I think 5-10 max would work (the boat has a crash-bar) and I suspect manual adjust would be fine unless others on here say that moving up and down under-way has some large benefit.


lhg posted 04-10-2002 05:21 PM ET (US)     Profile for lhg    
Pete - see the Reference section for photos of my 18 with twin manually adjustable 10" setback jackplates by Springfield Marine (they also make a lot of the pedestal seats). I can guarantee you the 10" or 12" setback will improve the handling and RIDE of the boat.
jimh posted 04-10-2002 07:25 PM ET (US)     Profile for jimh  Send Email to jimh     
At the end of the article there is a list of bracket makers with hyperlinks to their websites.

I was recently at BASS PRO SHOPS looking at some of their "house-brand" boats. One of their bass boats has a nice aluminum setback bracket which was very similar to the SPRINGFIELD MARINE bracket, except there was no height adjustment.

You could, of course, adjust the height by moving the motor mounting holes up or down.

Full transom boats need about 30-inch of setback to allow the larger engines to tilt forward. If you have a cut transom boat you can use less setback and still tilt into the old motor well area.

peteinsf posted 04-15-2002 02:19 PM ET (US)     Profile for peteinsf    
Is there any difference in the bolt pattern on a 20" vs 25" motor? I had a sales guy say his offset bracket would only work with a 20" motor. Seemed sort of strange.
lhg posted 04-15-2002 05:26 PM ET (US)     Profile for lhg    
Must be a "strange" bracket! The engine brackets are the same for a given range of HP, regardless of shaft length. The engine bolt pattern has been universal for at least 15 years now, all brands, for all engines over 30HP or so.

It never ceases to amaze me how mis-informed some of these Dealership employees are. We see this continually on this site.

peteinsf posted 04-15-2002 07:13 PM ET (US)     Profile for peteinsf    
Maybe it can't handle the extra 5" of lever torque? It could be a very flimsy bracket.

When he was talking I thought it might be that a 25" may have the lower mounting bolts a bit lower (farther away) then a 20" but I didn't really believe it!

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