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Author Topic:   Scotty Downrigger Plug Adaptor to Newer Marinco Plug
fishbadger posted 08-22-2010 12:16 PM ET (US)   Profile for fishbadger   Send Email to fishbadger  
I have a 2006 305 Conquest with 12-Volt receptacles under the aft gunwhales which look like large 4-prong trolling motor receptors. I have some Scotty [downrigger]s I'd like to plug in which have the newer Marinco plugs that are smaller and look like:

Is there an adapter available from Whaler or elsewhere which will make that easy, or do I have to rewire the receptacle or plug?

Thanks in advance for any advice,


jimh posted 08-22-2010 12:42 PM ET (US)     Profile for jimh  Send Email to jimh     
Since the electrical receptacle is already installed in your Boston Whaler boat, it would probably be simpler to change the plug on the down-rigger electrical cord to a connector that will make with the existing receptacle. I am certain that will be much less expensive than trying to find an off-the-shelf adaptor. Such adaptor must contain two connectors, so they tend to be at least twice as expensive.
jimh posted 08-22-2010 12:54 PM ET (US)     Profile for jimh  Send Email to jimh     
A diagram from WHALERPARTS.COM for the 2006 205 CONQUEST shows a three-prong 30-A 12-V receptacle: pdf

I could not locate the schematic diagram that gives details on how the receptacle is wired.

davej14 posted 08-22-2010 02:45 PM ET (US)     Profile for davej14  Send Email to davej14     
Much easier to rewire the plugs as Jim suggests. You could make your own adapter but it would be a kludge.
davej14 posted 08-22-2010 02:48 PM ET (US)     Profile for davej14  Send Email to davej14     
If you decide to replace the receptacles, make sure you have access to the rear side of the bulkhead. You will be working blind to assemble small lock washers and nuts as well as the strain relief. It was a pain.
jimh posted 08-22-2010 04:09 PM ET (US)     Profile for jimh  Send Email to jimh     
Are the plugs on the end of the cords from the down-riggers a molded-on plug? Or are they just standard plugs which have been wired to the cord?

I hate to cut off a molded-on plug. But if the plugs are just standard plugs fitted to the end of the cords, you can remove them without much trouble and change the connector to the mating connector for the receptacle in the boat. The original plugs could always be put back on the down-rigger cords at a later date, if desired.

fishbadger posted 08-22-2010 07:21 PM ET (US)     Profile for fishbadger  Send Email to fishbadger     
Thanks folks,

The plugs are molded on and awful nice, but me-thinks they're gonna get sacrificed. Thanks for the diagram and part Jim. . .that gives me a good idea what male plug to put in there. Should be a no kludger,


davej14 posted 08-23-2010 08:25 AM ET (US)     Profile for davej14  Send Email to davej14     
Are you sure they are molded on? My 3 yr old Scotty came with the newer style Marinco two prong plugs. The strain relief was tight to the plug and cable but it was removable. Look for a split line on the front surface of the plug and pry it back with a thin blade. The strain relief goes completely over the plug insert so it would be easy to mistake it for a molded cover. You can see the assembly in the right hand view on page 43 of the Marinco catalog.

jimh posted 08-24-2010 08:17 AM ET (US)     Profile for jimh  Send Email to jimh     
If the plugs on the down-rigger cables are MARINCO plugs, I would be very surprised if they were molded-on plugs. MARINCO sells the trolling motor plugs as individual assemblies, and I did not see any mention in the MARINCO catalog of the trolling motor plugs being available in pre-molded cord sets.

Also, on page-9 of the SCOTTY catalogue, replacement plugs are shown as individual items, not as molded-on plugs and cord sets.

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