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Author Topic:   Power Disconnect for Trolling Motor
Binkster posted 01-02-2015 08:04 AM ET (US)   Profile for Binkster   Send Email to Binkster  
I want to mount the battery for the rear-mounted trolling motor in the center console for weight distributing reasons, but I need a way to disconnect the the power at the transom to the trolling motor so I can remove it from the boat when not in use.

rich

saumon posted 01-02-2015 08:23 AM ET (US)     Profile for saumon  Send Email to saumon     
Search for MKR-18 plug and receptacle kit. It's a watertight quick disconnect kit available everywhere--Walmart, West Marine--for around $25. Works well.
jimh posted 01-02-2015 09:19 AM ET (US)     Profile for jimh  Send Email to jimh     
The MKR-18 connector set appears to be made by MinnKota and sold at Walmart.
Binkster posted 01-03-2015 09:14 AM ET (US)     Profile for Binkster  Send Email to Binkster     
OK, I see that MKR-18 plug and receptacle will work, but now new questions arise. How, and where could I mount the receptacle in a foam filled Whaler. Mounting it in the center console would require at least a 6-7 ft. electrical cord laying on the deck of the boat when I would use the trolling motor.

rich

dfmcintyre posted 01-03-2015 10:12 AM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
Rich--what about running the cables in the tunnel to the stern. At the stern fabricate (I know from previous posts your good with fiberglass...) a box for the disconnect to live in.<

Second thought (you can tell it's cold and snowing in Michigan right now):

If handy enough with a drill, what about drilling horizontally in the small bilge area, 2 to 3-inch, a second hole down in the splashwell to hit the first hole, and then a third hole again horizontally about half-way-up the outside of the splashwell into the vertical hole?

Then mount the receptacle flush on the vertical portion of the splashwell, say one-foot above the deck.

You'd have to do a small repair in the splashwell and waterproof the other two remaining holes.

saumon posted 01-03-2015 12:56 PM ET (US)     Profile for saumon  Send Email to saumon     
How about an L-shaped bracket made of 2-inch or 3-inch flat bar aluminum with a hole to accomodate the receptacle? That bracket could be fastened somewhere near the main outboard transom bracket, with the battery cables following those of the main harness.
jimh posted 01-04-2015 03:02 AM ET (US)     Profile for jimh  Send Email to jimh     
The plug connector is designed for a cable-end mounting. The mating connector is not. It is designed for mounting on a bulkhead. Is there a cable-end mating connector available?
Binkster posted 01-04-2015 07:10 AM ET (US)     Profile for Binkster  Send Email to Binkster     
Thats the thing, jimh, its not possible to mount the mating connector to any bulhead on a 15 footer for obvious reasons. I know some folks have mounted electric trolling motors on the bow of small Whalers. Do they also have the battery mounted in the bow?
The mating connector mounted on an exposed aluminum L bracket won't look right.
jimh posted 01-04-2015 10:00 AM ET (US)     Profile for jimh  Send Email to jimh     
Perhaps an alternative connector, one designed for both genders to be installed on cable ends would be better. For example, the Neutrix SpeakOn connectors, particularly the STX series. There are both male and female genders for cable-end connectors. Although this is designed as a loudspeaker connector, it is rated for 40-Amperes continuous current. See

http://www.neutrik.com/en/speakon/stx-series/nlt4mx-bag
http://www.neutrik.com/en/speakon/stx-series/nlt4fx-bag

Note that these are four-pole connectors. If you just need a two-pole connector, you could double-up the contacts and have an 80-Ampere connector.

The SpeakOn connectors are very widely used, are not hard to get, and are not very expensive. They are easy to assemble.

dfmcintyre posted 01-04-2015 11:49 AM ET (US)     Profile for dfmcintyre  Send Email to dfmcintyre     
Rich -

Ah, I didn't realize the vessel is a 15'. Might not have enough room to do it. Anything shy of somehow a flush mount back there is going to look pretty aftermarket. Jim's suggestion might be the easiest; only concern is keeping it up and out of the bilge or off the floor when not in use. Might use some hook / loop tabs to keep it mounted on the outside of the splashwell when not in use.

Don

Binkster posted 01-04-2015 01:19 PM ET (US)     Profile for Binkster  Send Email to Binkster     
I think the best approach to this problem is to mount the battery in the stern on the port side, same as I did in my 13 footer. I don't even know that I have a weight distribution problem as I have yet to splash this boat. The 2 stroke Yamaha C60 is not a heavy engine, and the console is mounted forward of the original one and is somewhat heavy, compared to the original Striper side console.

rich

saumon posted 01-04-2015 02:26 PM ET (US)     Profile for saumon  Send Email to saumon     
If you don't want/can't install a flush mount receptacle, then they also make a free standing connector

http://www.minnkotamotors.com/Products/MKR-20-TROLLING-MOTOR-QUICK-CONNECT-PLUG/

Binkster posted 01-04-2015 02:46 PM ET (US)     Profile for Binkster  Send Email to Binkster     
That Quick connect plug would work, but the plug would always be in the weather. How could it be waterproofed

rich

saumon posted 01-04-2015 02:58 PM ET (US)     Profile for saumon  Send Email to saumon     
Can you post some pics of the transom area of your boat?
Binkster posted 01-04-2015 10:14 PM ET (US)     Profile for Binkster  Send Email to Binkster     
I will in a week or so.

rich

jimh posted 01-04-2015 11:41 PM ET (US)     Profile for jimh  Send Email to jimh     
The SpeakOn connector I suggested (above) is rated as being waterproof when mated. I don't think there is any electrical connector that is rated as waterproof when it is not mated.
saumon posted 01-05-2015 11:58 PM ET (US)     Profile for saumon  Send Email to saumon     
It looks like MARINCO make an equivalent product to the Minn Kota MKR-18:

http://www.marinco.com/en/12vcps2

But, even mopre interresting, they also make a rubber weatherproof boot in which you could put the female receptacle (you simply doesn't put the front panel):

http://www.marinco.com/en/300275

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