In Canada you can source all types of capacitors from SAYAL which has 5 stores in the GTA (Greater Toronto Area). Altho SAYAL is relatively convenient to me, AMAZON is much more convenient with to-my-door delivery, I hav ANAZON PRIME so 99% of the time the shipping is free. I hav bought several assortments of various types of capacitors with axial or radial solderable leads (not SMD, surface mount devices). I do Amateur Radio + a wide range of other experiments in electronics. On the other hand, perhaps other readers are better off buying just exactly the quantity & type they need for each individual motor, rather than lay out $$ for an assortment.

Hi Double Rum
Happy to have helped. As you are in Canada you need advice from our Canadian members as to where you can source capacitors locally. Most model suppliers on-line offer kits of capacitors at reasonable prices that will meet your requirements. Also any electronic component store will stock suitable ceramic components.
dave976

Thanks Double rum, looks like you need the capacitors. Not sure where you would buy them from, but this sort of capacitor costs 10 pence (maybe 15 cents) if you buy 50. RC suppliers might charge you 2 dollars for just 3! Then there is postage!
Roy

I see the ProBoat ESC in your photo. I took mine out of my 47' USCG boat. Water cooled (?) made me think the ESC was not efficient (the motors are not high current drawing). Besides, they ProBoat ESCs have a lousy low speed to them. Replaced it with two Hobbywing 1060 brushed ESCs, one for each motor. (...and no capacitors.) Runs much Better!!!
Lew
Florida, USA

Im using a Mabuchi 550 motor and a Pro boat ESC. The ESC is rated at 12 volts, I bought it new about four years ago. For a radio i have a Futaba Attack ER model T2ER. Have attached pics of the radio and ESC.

Hi Chugalone, thanks for your kind remarks and so nice to see a young person in the hobby!
Roy

Great information about capacitors.
I always wanted y to know this so important detail.
I truly thank all of the members involved in this chat. The more you chat the more I learn.
I’m pulling my favorite rocking chair to watch and learn.

Hi Double Rum
There is a How To Articles section on this site and if you search for Motor Suppession you will see a diagram of how to connect the capacitors. You should use ceramic 0.1uf from each brush connector to the motor case and a 0.047uf ceramic capacitor across the brush terminals. Do cover the bare wires with insulated sleeving to avoid shorts.
Suppression used to be a real necessity when we used 27Mhz and 40Mhz equipment and whilst modern 2.4Ghz may not suffer to the same extent the ESCs and servos may well be affected so if using a brushed motor suppression is advisable, and will prevent interference with other models who may still be using 27Mhz or 40Mhz.
As others have said it is important to keep the main power wires well away from the servo wires and receiver aerial.
dave976

I agree with Roy about capacitors for motors while using a 2.4 mhz radio. Since using th 2.4's I have not been installing capacitors on my motors - no problems.

Lew
Florida, USA 🇺🇸

12Volt brushed motors are ubiquitous & inexpensive thanks to the 12V systems in most cars. Operating a motor at a voltage below nominal generally has no detrimental effect on performance. In fact, running a motor at lower than nominal voltage (and, therefore, slower than nominal speed) can result in less brush and commutator wear (for brushed motors), lower current consumption, and longer motor life.

I run 12V brushed motors using 7.2V NIMH packs and even 6V SLA. The available torque is less, reduced, but i am talking scale-like workboats, not high speed electric racers.

I concur with 0.01 microFarad ceramic capacitors in the 3-cap configuration to mitigate interference to ANY other electronic devices within a mile or so across water.

I agree on size of capacitors most have a 50 volt working so no problem. The remarks about 2.4 Ghtz working:- The equipment is OK without suppression. But if you come near when in operation to 27 or 40 Mhtz operations the motor will interfere with the other radio.

If you fit capacitors I recommend 3 of them. One across the brushes and then the other two from each brush to bare metal. This will give imunity to interference at a distance.

Which Mabuchi motor are you using? The model ones have a number like 55 or 75, sometimes there is a 0 between the numbers.

There are fewer esc's that will operate at 12 volts, which one do you use?
regards
Roy

If memory serves, it would be 0.01uf, ceramic capacitors.
Than said, unless you are running an older radio that operates in the surface range, 75mhz, or 27 mhz, OR if you run your boat with folks who operate in those ranges, there is not a great need to mount them.
2.4ghz radios are pretty immune to RFI and most folks do not add capacitors anymore.