Potting motor 6384

[gmorillo]

I’ve been following this forum for a couple of years and learning every day from everything you write.
My name is Gonzalo and I live in southern Spain. I’m currently very happy with my home assist.
-6384 motor
-SEqure 12200 ESC
-11S4P
I’m here to summarize my latest potting, as the previous two didn’t work well.
-First 6384 motor with generic epoxy potting, which was a mistake as it does not dissipate heat well and burned out after 8 sessions.
-Second 6384 motor with Electrolube thermal epoxy potting, which worked very well. However, I made a mistake when sealing the cables about 20 cm from the motor. I didn’t seal the heat shrink tubing properly and water ended up getting into the cable, causing one of the motor phases to fail after 4 months.
-Third motor (photos attached) 6384 Electrolube thermal epoxy potting. This time, I made sure that the cables were embedded inside the motor and at the other end in a Teflon machined connector.

I don’t have a 3D printer, so I machine my molds on a CNC machine, which is a good machine.
I hope you like the process.

[Jezza]

Which electrolube are you using as a matter of interest?

[gmorillo]

Electrolube ER2183, 250 gr

[lishine]

Datasheet of ER2183 indicates viscosity 5000. It is very high viscosity for the application. It probably didn’t penetrate inside.

[gmorillo]

When you mix resin and catalyst, the viscosity drops significantly and it becomes more liquid. I recommend pouring quickly.

[poloswindsurf]

Hi, what is the advantage, compared to Flipsky 6384 waterproof ? The price seems close if you add time and resin ?

[gmorillo]

I don’t know how Flipsky works, but I’m sure it will work great!!!
I decided to do it this way because I really enjoy discovering and learning new things. But you’re right that in terms of price and time, the cost is the same as Flipsky.

In the future, I would definitely buy Flipsky 6384 if someone tells me it works well.

[poloswindsurf]

The problem with Flipsky motors, is the cables… If water gets in, it’s not repairable.

[Jezza]

Thats a common problem on all motors that go underwater in a marine environment.

[MAH77]

So are there any better marine motors than the Flipsky 6384? Or do you just have to plan to buy a new motor every couple of months?

[sat_be]

You can recoat it and replace the bearings. It depends on how often you use it.I have a Saite 64100 I use for years (mainly in fresh water). I replaced the bearings and recoted it twice. I also recrimped the cables. Still runs smoth.

[poloswindsurf]

You can choose better cables if you build your motor

[poloswindsurf]

If you take care about cables you can keep it a long time.
Perhaps with tow boogie there is less cable problems than with foil assist in a back pack

[Jezza]

@MAH77

So are there any better marine motors than the Flipsky 6384? Or do you just have to plan to buy a new motor every couple of months?

I’ve had a flipsky for almost 2 years and its still going. Its just about maintenance.

[Jezza]

What better cables are you wanting? Are you cutting the silicone sheath by mistake or something?

Even if you build, then you can still run into cable issues if something underwater lets water in.

[poloswindsurf]

Yes, cutting the silicone because of kparts pod (space for cables is too small).
And because of my first build’s mistakes

[lishine]

Great job.
I would like to do it also in the future. But I want a process which will give me a smooth, not porous, right and shiny surface like FD motor.

Probably need to use vacuum or pressure pot and some coated mold.
The mold have to protrude inside between the metal stator verticals such as to minimize amount of epoxy.

Currently I fill the base with epoxy and spray corrosionx after each session which is good enough.