Author Topic: Anyone installed a set-back bracket or jackplate on a CVX16?  (Read 11673 times)

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Offline Mechanick

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Anyone installed a set-back bracket or jackplate on a CVX16?
« on: September 23, 2018, 10:25:15 PM »
We are mid way thru replacing rotted keel, floor and transom on a CVX 16 (Johnson  GT 150). Drove over to Evinrude’s demo on Lake Minnetonka this weekend and very suprised to see a lot of 6”+ static jack plates being utilized with outboards for more “efficiency and better handling.”  Commentary on the web seems to favor full flotation set-back brackets (vs jack plates) to get the same efficiency effect as a jackplate but added flotation when sitting in the water to compensate for greater leverage the weight of the OB has sitting back further. Is this something anyone in this forum has considered or implemented on a boat as small as the CVX16?  Is it more hype than the effort required?  Feels to me like setting an OB back an additional 18” on a short boat would add stability.  We mostly straight-line ski and barefoot, and a longer “wheelbase” (if you’ll permit that comparison) would seem a good thing, no? Advice much appreciated!

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #1 on: September 23, 2018, 10:47:01 PM »
Maybe check over at Scream & Fly …
I've seen OB bracket like that on vary large off shore fishing boats.

Offline V153

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #2 on: September 24, 2018, 06:22:15 PM »
No. You don't wanna put one of those on a CVX16 ...
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


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Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #3 on: September 24, 2018, 08:11:45 PM »
No. You don't wanna put one of those on a CVX16 ...
.  “No” to the bracket or jackplate or both?  Maybe 18” is a stretch for a 16’ boat.  I see 3” setback via jackplate on youtube CVX16—looks dialed in!

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #4 on: September 24, 2018, 08:18:56 PM »
Jack plates are to get the motor lifted up and get as much of it as possible out of the water for speed.
If your skiing with your CVX, your going to want to keep motor down, or you'll get blow outs in corners.
Aren't speed for skiing around 30 to 35 MPH ?

Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #5 on: September 25, 2018, 10:09:22 AM »
Thanks...Good point on cornering.  We mostly straight run our skiing (only sharp corner to pick up a dropped skiier ;). Barefooting gets us into the 40-45 range, and weve had issues getting a 16 foot boat to that speed with an older 150HP in the past, but it is really improved stability from a setback that we are after here.  Static jack plate or bracket—just asking if more setback adds stability and how much setback is ideal.

Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #6 on: September 25, 2018, 10:11:04 AM »
Maybe check over at Scream & Fly …
I've seen OB bracket like that on vary large off shore fishing boats.
.   This site helped, thanks!

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #7 on: September 25, 2018, 01:35:34 PM »
WOW !
A Johnson GT150 didn't have enough power … What prop are you running ?
Sorry .. I don't know the answer to your question about stability.

Offline Plugcheck

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #8 on: September 25, 2018, 02:13:02 PM »
OK, dare I say it, you need a Ski Machine.    Somehow 16 foot boat, 150hp, and barefoot skiing at 45mph tells me I've become my parents.  Honestly, if a 150 wont push a 16 at 50mph plus, there is something wrong.
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Jason

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  • 1974 CV16SS, 1986 CV23
Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #9 on: September 25, 2018, 02:41:49 PM »
OK, dare I say it, you need a Ski Machine.    Somehow 16 foot boat, 150hp, and barefoot skiing at 45mph tells me I've become my parents.  Honestly, if a 150 wont push a 16 at 50mph plus, there is something wrong.

That's a great idea!
Jason S.
1974 Glastron Carlson CV16SS 140 I/O
1986 Glastron Carlson CV23 260 I/O

Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #10 on: September 25, 2018, 03:53:19 PM »
LOL—gorgeous boat!  I think my transom will look that big if I would build it like I wanted ;).  Ok, to be fair, it was a 16’ Larson tri-hull with the 150  (Prop must have been a 18+ pitch?...too young at the time to notice) but with 5 people on board it struggled to pull a 180# barefooter.   I know this CVX16 is a whole lot lighter, so shouldnt be an issue for getting to speed—why I’m asking is if adding setback create more stability. ((Whats the transom set up look like on that Ski Machine?)

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #11 on: September 25, 2018, 04:48:28 PM »
Ski Machines & Sprints

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #12 on: September 25, 2018, 04:49:15 PM »
Few more ...

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #13 on: September 25, 2018, 07:33:38 PM »
Sprint

Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #14 on: September 25, 2018, 08:47:59 PM »
Ahhhh!  I bought the wrong boat! ;). That is a great looking ski set up—I really like that stretched tail and what looks to be a much sturdier transom.  Thanks for the pics!  I’ll have to put one of these on my to do list.

Offline Hyperacme

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #15 on: September 25, 2018, 08:56:13 PM »
This one is worth about $1000 to $1500 from look's of pictures.


1982 GLASTRON SKI BOAT (Glastron Carlson) - $3500 (Roseville)
https://minneapolis.craigslist.org/ram/boa/d/1982-glastron-ski-boat/6701797650.html

A hard to find classis ski boat. Glastron CVX-20 with a nice Evenrude 150hp (rated 200) will do over 50mph and water ready now. Interior seats and padding was replaced several years back and now just needs some new wood bottoms that we already cut. You can still enjoy the rest of Summer and fix seats this Winter. Solid trailor and newer custom cover. ( if we make a deal I can throw in life jackets tow rope and anchor) $3500 OBOffer

Offline Mechanick

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #16 on: September 26, 2018, 06:50:42 AM »
I think you are spot on with your $ assessment—gelcoat in that poor a shape usually comes with a soft floor/keel.  Here’s my Craigslist purchase...before and after teardown.  Will send photos after transom is beefed up and glassed in.

Offline dorelse

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #17 on: September 26, 2018, 08:16:02 AM »
The interesting thing about this is that the new Glastron OB's have a setback pod on them now.  Clears up the splashwell, so you don't need to have one, and allows a full swimdeck area.  Honestly, a great design.  I'm curious how they'll hold up in 20 years, but they don't have to care about that...
1990 Sierra 1700

Offline V153

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #18 on: September 26, 2018, 02:43:16 PM »
.  “No” to the bracket or jackplate or both?  Maybe 18” is a stretch for a 16’ boat.  I see 3” setback via jackplate on youtube CVX16—looks dialed in!
No to the bracket. Jack plates are fine. 6" Atlas on a CVX16. 150 HO Etec:
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP

Offline V153

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Re: Anyone installed a set-back bracket or jackplate on a CVX16?
« Reply #19 on: September 26, 2018, 02:49:17 PM »
Fwiw if your primary use is for pulling skiers/toys? I'd think you'd want the motor on the transom, prop buried deep. Imo.
'81 C500_given away, bought back_75.1 mph
'81 Baja 15SS_140 Frankenrude_66.7 mph
'70 something SpeedCraft_(Allison 16R Clone)_69.0 mph
'79 CVZ19_given away
'71 V153_54.8 mph_wrecked


WALK TALL AND CARRY A BIG BILGE PUMP