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Electric Boat Conversions / Sailboat Motor Conversion - 5kw or 10kw?
« Last post by PipeDreamIII on September 09, 2025, 07:33:42 PM »
Hi All,

I'm looking to convert the motor on an older Hughes 26 Sailboat. The boat weighs about 4500lbs, and has a hull speed of just over 6 knots. I'm debating between the 5kw and 10kw motors. I'd like to hear from others what they've put in and what they would recommend.

Thanks!
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Magic Pie & Smart Pie Discussions / Re: New user/ aquired a drift trike
« Last post by Bikemad on July 20, 2025, 10:01:22 PM »
Hi andto the forum.

Did the three LEDs on the throttle all light up when the battery was connected and turned On? If the LEDs were not lit up, it could be a battery problem.

If the motor has been completely submerged in water, the motor's controller and bearings may have been affected by short circuits or corrosion, especially if it was salt water.
However, if the wheel still rotates easily by hand, the stator and magnets may still be salvageable, but the motor would need to be dismantled to see the full extent of any water damage to the magnets, the laminated steel stator assembly and possibly the steel legs on the Hall Sensors.

If the entire trike has been under water, there's also the possibility that the water might have affected the throttle and/or the various connectors on the wiring harnesses as well.

Start by carefully checking all the connector pins for signs of water residue or corrosion, especially the 5 pin throttle connector and the main 10 pin connector between the main harness and the motor harness.
If you find any water residue, clean and dry the connectors thoroughly and see if it makes any difference.

Unfortunately, the controllers have been known to fail if water gets inside them, but you would have to remove the controller assembly to check for any signs of water being inside the controller. . :(

Alan
 
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Magic Pie & Smart Pie Discussions / New user/ aquired a drift trike
« Last post by JDunno on July 19, 2025, 03:25:06 AM »
Hello, name is JDunno. I've just registered here because I'm completely lost when it comes to electric bikes and trikes. I'm an old school combustion engine guy, trying to get up to par with the electric side of things. I've acquired a drift trike that has the golden motor on the front big wheel with a 48v battery that locks in place on the back. Upon getting juice in the battery and turning it on, I got no response from twisting the throttle. So I got ro checking things out and come to find the front wheel motor is or was completely full of water. That's where I'm at with it now. Was wondering if it's salvagable or do I need to replace it?
   Thanks in advance for my confirmation as a memeber and for any responses I may recieve.
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General Discussions / Re: Improve acceleration on EZKontrol 48V BLDC and 5kW Motor
« Last post by e-lmer on July 03, 2025, 05:30:57 PM »
Hi SilverFixer
There are eight different versions of this controller.
The model number starts with a letter followed by 6 or 7 digits.
Please let us know which one you have.

Elmer.
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General Discussions / Re: New member with torque arm question
« Last post by Bikemad on July 03, 2025, 10:59:01 AM »
Quote from: e-lmer on July 03, 2025, 04:35:15 AM
Have you seen this:
https://www.reddit.com/r/ebikes/comments/ucjgnr/diy_torque_arm/

A spanner can make a crude but effective torque arm when secured properly, unfortunately the one in that photo would not be very effective if regen were used, as the axle would simply twist the spanner away from the bolt being used as a stop.

Of all the torque arms I have seen, I think these are the best torque arms currently available for hubmotors with 14mm solid axles:



Click on the above picture, or watch the excellent video here for further information.

However, with a price tag of $55 (USD) this quality item isn't cheap.

Alan
 
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General Discussions / Re: New member with torque arm question
« Last post by e-lmer on July 03, 2025, 04:35:15 AM »
Hi Alan.  You are correct except the axle spinning is not the root cause.  The problem is the repeated accelerate/decelerate cycle listen the nut. This not only allows the axle to spin, but eventually drop out.  Keeping the nut captive and tight has eliminated this risk. 
Have you seen this:

https://www.reddit.com/r/ebikes/comments/ucjgnr/diy_torque_arm/
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General Discussions / Re: New member with torque arm question
« Last post by Bikemad on July 03, 2025, 12:17:35 AM »
Elmer,
What you have proposed is basically a locking tab/plate for the axle nut, but this will not directly resist any torque from the axle itself.

A torque arm is used to resist axle movement by acting directly upon the flats of the axle and preventing it from rotating in either direction (under power and under regen).

Simply locking the axle nuts in relation to the dropouts is unlikely to prevent rotational movement of the axle itself, and therefore should not be used instead of suitable torque arms.
I don't see a problem with using your nut locking tabs/plates in addition to torque arms if you are concerned about the axle nuts working loose over time.

If the axle nuts were able to be torqued up tight enough to prevent the axle from rotating (without stripping the threads), the nuts should not require locking tabs as they could not work loose over time if there was no rotational movement of the axle.

Alan
 
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General Discussions / Re: New member with torque arm question
« Last post by e-lmer on July 02, 2025, 09:40:41 PM »
Alternately you can make a custom one that fits over the nut,
then bends around to screw to the fender mounting holes.

I used a Dremel to cut through the hex shape, then a chisel to
bend the resulting triangles up and around the nut hatch.

I have attached a drawing, but I may be able to attach
a photo next time.
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General Discussions / Improve acceleration on EZKontrol 48V BLDC and 5kW Motor
« Last post by Silverfixer on June 22, 2025, 09:39:08 PM »

I purchased the items listed below (plus contactor and cooling system) for an electric conversion of an off road go kart buggy. I have these setup with two 48v liFePo4 batteries, each battery is 32AH and vendor specifies that a single battery can output 200A for 10s and 120A continuously. The go karts top speed is great at about 27 mph but the acceleration is slower than I'd hoped. It seems to take quite a while for the controller to increase the amperage up to the maximum 250A setting limit. Even in sport throttle mode, it doesn't seem to increase the acceleration amperage up to 250a for quite a while.
Are there other controller settings I can adjust to increase the acceleration?
Thank you

EZkontrol 48 Volt Universal BLDC Motor Controller 500 Amps (3-5 KW)
5 KW BLDC Motor Air Cooled 48 Volts
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General Discussions / Re: e-bike with a magic controller
« Last post by Raevin on June 22, 2025, 07:01:46 PM »
Update . The magnets were in pieces when I pulled the stator.
The resolve was to purchase a new 26” wheel and hub and keep the rest as parts.
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