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Author Topic:   Outboard installation on a Rage 15
Docnmacy posted 04-20-2012 04:28 PM ET (US)   Profile for Docnmacy   Send Email to Docnmacy  
Hey guys,
I was hoping to get some input on this. I have a 15' Rage minus engine and jet drive. The bottom and back have been glassed. I'm questioning building/ buying a bracket or cutting a notch in the full transom and mounting the outboard.
I contacted Armstrong about a bracket and this was their comment:
We do not recommend using an Armstrong Bracket on boats under 16 feet.
Shorter boats are much more sensitive to positioning shifts in weight (like your Outboards being moved aft of the transom on an Outboard Bracket). This may result in the boat "porpoising" - the bow of the boat continually rises and falls when the boat is on a plane position. Therefore, Armstrong cannot guarantee maximum performance for boats under 18 feet."

This being an interesting argument. I have considered cutting the transom and mounting the engine in a traditional way. I would have to cut the back deck and add a splash well, not a big deal.

Will I need to remove all the foam in the transom and pour a transom replacement material in to give the structure?

Any thoughts will be appreciated.


where2 posted 04-20-2012 10:52 PM ET (US)     Profile for where2  Send Email to where2     
It's unfortunate nobody has taken the effort to create a fiberglass mold to make a "whaler drive" designed for the 15 Rages... Rather than notch the transom, the whaler drive concept would make the rage feel even longer than it is by extending the hull, and adding flotation where you really need it when you hang the outboard back there. In essence, you could make the 15 Rage ride more like an 18' boat by adding a 3' whaler drive. One of the beauties of the 15' Rage is the comfortable seating. I don't visualize how you could keep that rear engine lid, and notch the transom.
Teak Oil posted 04-21-2012 02:22 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Rather than notch the transom you could just mount the engine on a 6" jack plate. Lots of boats under 18' have jack plates without porpoising issues. You would not be nearly as far back as if you had used an engine bracket.

A 115hp outboard would make a Rage scoot pretty good.

I am pretty sure a few years ago someone did this same project, search the archives and I sure it will have some good info.

Teak Oil posted 04-21-2012 02:28 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
http:/ / smg. photobucket. com/ albums/ v472/ sraab928/ Rage%20Conversio n/ ?action=view& current=rageidea. jpg#!oZZ19QQcurrentZZhttp%3A%2F%2Fsmg . photobucket. com%2Falbums%2Fv472%2Fsraab928%2FRage%2520Conversion%2F%3 Faction%3Dview%26current%3DDSC02919. jpg
Docnmacy posted 04-21-2012 03:14 PM ET (US)     Profile for Docnmacy  Send Email to Docnmacy     
Hey Teak Oil,
Those are the pictures that got me into this mess in the begining. :)
I chatted back and forth with him and the problem with his boat is that the motor won't tilt all the way up, it hits the transom. I did the measurements on my motor which is still on my old boat. I need 16" to fully tilt the motor.

Well 16" turned into 24 real fast on paper to have a usalbe swim platform.

One of my thoughts since it is only a 70 I'm mounting is to have a t-top builder bend some tubes and mount an engine plate and a platform on a tubular bracket.
The other idea is to create 2 stringers that go from under the seat through two cutouts in the transom. Build a bx around them and the engine mount to it. That will create a base for a swim platorm and extra flotation.

Then there is my wife saying....... "When will the boat be ready?"

Teak Oil posted 04-22-2012 06:12 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Have you considered using a longer shaft outboard and mounting it higher on the transom? Not sure if it would give the necessary clearance or not.

I know others have used a 70 on this hull before, but it seems like it would be pretty underpowered and resale would not be very good. I would think a 115 would be the minimum desired for this hull, especially since it was offered with up to a 175 jet motor.

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