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#desc