DIY brushless boat trolling motor for REAL Fishing Boat? - RC Groups
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Jul 28, 2012, 08:38 AM
Registered User

DIY brushless boat trolling motor for REAL Fishing Boat?


I know that this thread is bit off-topic.

I think that anybody who is into fishing knows minn-kota electric trolling motors ( . But I want to make something like minn-kota, myself for 4m pontoon boat. I will use it on fresh water lakes only. But here comes the hardest part of it. I will need and brushless out/inrunner that will swing an 8-10 inch prop underwater on 12V and wont over heat. The motor will be sealed in pvc pipe. And the question would be: where i could get that motor?

(I have searched hobbyking but their choice of motors is limitless, so i couldnt figure out what motor to buy)
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Jul 28, 2012, 04:23 PM
NeverAgainVolunteerYourse lf
nick_75au's Avatar
The Minkotas depending on the thrust draw about 40-60 amps with an(estimated) 2000 RPM which givs a figure of 166 Kv, can you get a figure?

You have to look at the gas equivalent motors to obtain that sort of power at a low enough RPM, the other option is usa a smaller faster motor with gearing to get the RPM down to the same level, I understand that this is the way the Torqueedo motors are built.

Torqedo brushless

Interesting 8:1 gearing.

Jul 29, 2012, 01:29 AM
Registered User
Ok, now i can start looking for motor. I believe outrunners have more torque than inrunners, but how about the cooling. The motor will have maybe 1-3 cm air around it.
Jul 29, 2012, 01:32 AM
NeverAgainVolunteerYourse lf
nick_75au's Avatar
If the motor is mounted on an aluminium plate that has contact with the water that should be sufficient.


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