November 29th, 2010 by Kevin Hannula
This site attempts to answer your questions about fishing boat wiring and marine electrical techniques, concepts, and products. We get lots of mail from folks in mid-project or who are just curious about their boat’s electrical setup.
There are loads of post already on the site which we hope you will browse through. If you’re trying to track down info about a more specific category, please use the search box in the upper right of this page or check out the list of various subjects farther down on this page.
If you aren’t able to find the info that you need to complete your particular fishing boat wiring project, please send us an email at email@example.com.
Thank you for visiting. We look forward to hearing from you and hope that you will be able to come back often.
June 17th, 2013 by Kevin Hannula
This may be a stupid question and a stupid idea, but here goes.
I need to rewire my boat for a bigger trolling motor. Right now there are two
#8 positive wires and two #8 negative wires running from battery area to where trolling motor plugs in.
The trolling motor manufacturer says that this model of motor requires #6 wires.
Can I attach the two #8 positive wires to a heavy duty marine buss terminal located by plug
in receptacle and then a short piece of #6 to tie into receptacle? And do the same for negative side with another buss?
It is not the best solution but it would certainly work fine. Make certain
that you have the correct circuit protection in the positive lead at the battery.
February 20th, 2013 by Kevin Hannula
Your site is amazing. Thanks for all the info.
Now here is my boat wiring question:
We have a Native 14.5 ft Kayak. It only weighs 75 pounds and wish to power it with a 12 volt Motorguide trolling motor on some of the quieter lakes for fishing.
What are the battery options? Will a 24 volt with 93 amp hours work? And for how long? From reading your posts I learned we need a better charger than the 25 year old trickle charger we have, any gems you recommend?
Most of the time, you don’t want to discharge a boat battery below 50%, so you are only going to use 46 of the 93 amp hours available in the battery. The small, 30 lb thrust trolling motors draw about 30 amps at full power. At wide open, you can expect the battery to last about 1.5 hours. A 5 amp charger would take about 9 hours to recharge the battery after use.
Hope this helps,
February 20th, 2013 by Kevin Hannula
Could you please tell me the best place to find an oddball boat wiring harness? I need one that will fit a Johnson 75elr78c engine from the red plug in the ignition switch?
Thank you for your help.
I’m sorry, but neither of our wiring sites have anything like this. If it were me, I would try ebasicpower.com.
December 26th, 2012 by Kevin Hannula
I recently bought a 16 foot Smokercraft fishing boat with a 60 hp Mercury EFI 4 stroke engine. I also bought a stereo unit for the boat and was hooking it up and now I have 3 problems.
- No power tilt and trim
- No turn over of the engine with the key start
- No power to my fish/depth finder.
I have checked the fuses. Both the one of the engine as well as the one on the fish finder.
I ordered a key switch unit and a 20 amp circuit breaker. If this does not fix the problem—do you have any suggestions of where I should look next?
All of the above worked before the stereo hook-up in which I connected the power cable to the ignition.
Thanks for your help!
There must be a blown fuse somewhere on your boat. Is there an in-line fuse at the key or an ignition fuse on the fuse panel?
I would use a meter or test light to look for 12 volt power at the key switch and make your way back to the engine.
I don’t believe a new key switch is going to solve the problem.
Let me know,
October 31st, 2012 by Kevin Hannula
When storing a small vessel on a trailer for the winter, is it advisable to connect a ground clamp to ship’s ground, ie, the zinc on the outboard?
There is no reason to unless you are doing something on-board that may produce a large static buildup such as running a vacuum cleaner.
Enjoy your winter,