Y leads from the motors to esc works fine on the viper 25 the current is well within the limits, now I have obtained a hobbywing quick run dual which also works well and I don't have so many leads,now why does it whine so much when I start running it?

Hi Neil,
" 2 motors and esp,s with a y shape lead linking to the transmitter ..."
To the TX? Musta bin a very long lead😁😂

😎

Going to try it in the morning with a spare viper 25 with my meter hooked up to check start amps and running current, goodnight all and will post a reply.

I used 2 motors and esp,s with a y shape lead linking to the transmitter it works well. Neil

The wiring is very easy, but before doing this, ensure the two motors do not overload your ESC amperage capacity and have it fused accordingly.
One extreme method, is to measure the 'Stall Amperage' of both motors together by locking g ViseGrip pliers onto both shafts, with the motors in a vise, or mounted in the boat, and with an Amp-meter in-line to the battery, briefly connect to battery, and see what the max Amp draw shows on the meter. This is extreme, but would replicate your props getting wound up in weeds or reeds.
Another method is to place your boat in the bath tub, ( with water), and hook up the motors directly to your battery with your Amp Meter in-line, and read the start draw and run draw. This is usually the most amperage your motors will draw
The wiring is to simply make two 'Y' wire leads, connecting one Y leg to each motor terminal , then connecting the 'Y' tail to your fuse, then ESC.
I can sketch this on paper and take photo if needed.

Yes I did misunderstand I have spring-loaded throttle so neutral is central.

Denis. I wasn't clear earlier on reversing. Yes most if not all transmitters have channel reversing settings on all channels.

What I was referring to was a reverse motion on the throttle stick either side of a neutral position. Without the neutral position on the throttle lever you will have a problem with most ESC configs getting the motor forward/stop and reverse to work.

If you have a sprung centre position on the throttle stick, this will be neutral for the ESC. Above this position will be forward and below will be your reverse (for the motor and boat direction).

My Tx is an aero transmitter and doesn't have a mid neutral (or sprung) throttle stick position. I have used another method to get reverse in my boats

JJ.

Ok Denis, thanks.
Then you'll be better off with the mtroniks tio marine 15.
Which is LiPo safe, meaning it will not discharge your LiPo below it's safe limit.😊
Uprate the fuses to 20A with this ESC.
G'night All, Doug😴💤💤💤
PS: Reversing functions at the TX have no relevance to your original question.
Although it should be noted that most modern ESCs limit the max power in reverse to 50%.
Unless you change it in your programming😉

https://www.mtroniks.net/prod/Boat-Speed-Controls/tio-Marine-15.htm#description

11v 3s lipo

Hi Denis,
I see from the mtroniks spec-
"Running at 12V, at maximum efficiency, the M500 will run at around 9250RPM and pull around 1.4 Amps. Start up current, depending on prop size, would be around 15Amps."
And stall current at 12V 8.45A.
So you need an ESC which can handle 2.8A continuously and survive Stall current of around 20A if both props jam.
The mtroniks Viper Marine 10 should do the job nicely👍 See link.
It has built in Stall protection, but in a twin set up I would still fit a fuse of 15 or 16A rating to each motor to prevent the built in protection acting first and shutting down both motors.
Remember; the Inrush (start up) current can reach 15A. Which seems to me remarkably high for such a motor. Misprint in the spec perhaps?
These figures will vary depending on the battery voltage you are using. Which is???
Cheers, Doug😎
https://www.mtroniks.net/prod/Boat-Speed-Controls/Viper-micro-Marine-10.htm#description

2 mtronixs 500s and yes my tx does have reverse on all channels

I am using 2 mtronik 500s from Dean's Marine.

Hi Denis,
When choosing the ESC their current rating is the most important criteria.
It has to be able to handle the combined current of both motors.
And withstand the rise in current if one or both motors get stopped by rubbish caught up in the props, the so called Stall current.
Check you motor specs for Maximum continuous current and Stall current values.
The ESC should then be selected to handle the combined Stall currents of both motors.
E.g. if the motor Stall currents are 20A then you need an ESC rated at 40A or preferably a bit more for safety i.e. 50A.
Also, fit fuses between the ESC and motors. With a brushed motor it doesn't really matter which wire, but it's good practise to put them in the positive wire.
Value; roughly halfway between the Max continuous current value and the Stall current value.
Using two fuses like this means that you can still bring the boat home if only one prop is jammed😀
Attached PDF shows the wiring arrangement for four motors; two sets, port and starboard, of two motors wired to one ESC as you want. Acknowledgement to Action Electronics at Component shop, with which I have no financial connection other than buying their excellent products😁
At least up until Brexit☹️😠
Cheers, Doug😎
PS wire the motors so that they turn in opposite directions, port clockwise and starboard anticlockwise, i.e. turning inwards at the top, when going forwards. This helps to increase the flow over the rudder, increasing it's effectiveness, as well as counteracting the motor torque effect which can make the boat list excessively when under high power.
"Engine room - Captain: All ahead flank, gimme all you've got Chief!"

Denis. Have you chosen your motors and what did you settle on?

If the motors are identical, you could wire them in series or parallel. Typically you would use parallel wiring because brushed ESC typically run around a 12 volt supply and brushed motors are usually happy up to around 12 volts.. 24volt ESC are available but if you have 12v motors, 12v ESC should be your preferred choice..

Does your transmitter have a reverse function on the throttle? This will also determine the ESC you should choose..