Tuesday, April 25, 2017

Re: [Electric Boats] Long shaft outboard for electric conversion - which one?

 

Dan,

I made up 2, 3ft 2awg cables with tin plated copper lugs with 5/16" holes. One in red and one in black. These cables are already connected to the motor as are the switches too. Feel free to bench test it upon receipt. (I already have.) Just hook the black cable to the negative side of the pack and the red cable to the positive side. The coupler will be ready tomorrow. Everything else is all boxed up and ready to go. If the coupler is done early enough, I will ship tomorrow.

Scott

On Mon, Apr 24, 2017 at 8:46 PM, Daniel Michaels nov32394@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
 

Scott 30" would be min. Be The batteries sit end to end in two rows with one battery sitting overlap in the third row. ==

                                            -
The motor sits on the other side of the lone battery. The cables will come from the lone battery across the two rows to the motor. Each row is 7".


 
[Attachment(s) from Scott Masterson smasterson2@gmail.com [electricboats] included below]

Some additional information on using too large of a lower leg on electric outboard conversions.

Elco is a long standing manufacturer of electric marine propulsion solutions. They have been in business for over 100 years. It is safe to say that these folks know what they are doing.

They offer three electric outboards rated as follows:

4,320W (5.8HP)
6,240W (8.4HP)
7,920W (10.6HP)

For the 4,320W (5.8HP), they use a 5HP lower leg. (See "parsun 5 hp" pic attached and compare it to the "elco 4320 pic attached.)
For the 6,240W (8.4HP), they use a 10HP lower leg. (See "parsun 10 hp" pic attached and compare it to the "elco 6240 pic attached.)
For the 7,920W (10.6HP), they use a 10HP lower leg. (See "parsun 10 hp" pic attached and compare it to the "elco 7920 pic attached.)

They do this because they match the lower leg to the rated power of the motor. If you use too large of a leg, you will be inefficient and will overheat before you make the rated power. I still agree to the benefits of low end torque that an electric motor provides. It is beneficial to low speed propulsion, but power needs RPM.

I hope this clears things up.

Scott


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Posted by: Scott Masterson <smasterson2@gmail.com>
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Check out the automatic photo album with 5 photo(s) from this topic.
elco 6240.jpg elco 7920.jpg elco 4320.jpg parsun 5 hp.jpg parsun 10 hp.jpg

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