Engine control

[Kamel333]

Hello. Can I use the yamaha remote control box 704 (704-28199-P0) with my dual engines boat mounted with yamaha F115 TLR year 2007. Thanks

[boscoe99]

Where did you get your part number? What country are you in?

My records indicate 704-28199-P0 is the reference number for the single and dual 704 control box instructions sheet.

Here in the USA 704-48207-P1-00 is the latest part number for the twin engine 704 control box.

2015_Yamaha_MRP

Are you looking for a new control box or is this an older version/part number you are considering? Most any dual engine 704 control box should work.

[Kamel333]

Thanks for your reply. The 704 box comes from france I think. The reference is written on the operation manual.
The control box works can be installed with my engines F115-TLR year 2007, the main cable connection (10 pins) going to the engines is exactely the same and with the same colors of wires. The only difference is the cables 4 pins connection to engine that is supposed to be for the instruments is different connection wise and wire color wise. I was using digital multifunction tachometer 6Y5 and the new ones are digital network tachometer 6Y8, provided with 2 hubs and different length of 4 pins cables.
My question is how can I connect the 6Y8 instruments to my engines ( through hubs).
Do you have a schemetic or a pic showing where and how to connect the 4 pin cable to the engines. Is there any adaptor for the new 4 pins wire provided with the 704 box to fit on my engines.
Thank you.

[boscoe99]

The 704 control box has nothing whatsoever to do with the information that the gauges receive. Either the 6Y5 or 6Y8 type.

The ten pin harness that is used with the 704 control box provides electrical power and ground to either gauge type. If a 6Y5 gauge is used then the ten pin harness also has a green wire in it that supplies the tachometer reference signal. With the 6Y8 gauge all engine information is provided via what Yamaha calls a Command Link digital data network.

With a 6Y5 gauge all engine information (trim, oil pressure, over temperature) information comes via a four wire harness that connects between the engine and the gauge.

Here is a diagram that shows a twin engine configuration that is using Command Link gauges (6Y8 type).

[Kamel333]

Thank you for the wiring schematic, my question precisely is: is the connection between the multi hub and the engine is a 4 wire? And on the engine side in wich plug does it connect? I join here the picture of the connecting point that I have free on the engine side.
If it is possible to send me a pictureof the right connection point, that will be great. The cables I have with my hubs have 4 wires and no one fits in the plugs I have on the engines.
Many thanks.

[Kamel333]

Another picture

[Kamel333]

And a third one, thats all free sockets ahere I can connect something. Or maybe there is other ones that I am not able to see. Thanks.

[boscoe99]

The Command Link connector is bright refrigerator white. It is a four pin connector but will have only two wires connected to it. One blue, one white.

It is usually laying in the bottom of the engine pan.

The Command Link harnesses are four pin types with four wires. Red, black, blue and white.

Here is a link to a photo that shows the engine pan connector.

https://www.google.com/search?q=f115...rgX0xiyNrps%3D

[Kamel333]

Thank you for your help, I found the right connection with the white and blue wire.

[Kamel333]

Ii have a problem starting my engines..
In fact some bad guys tried to steal my boat mounted with 2 yamaha F115 TLR. they cut the wires and tried to start it, they of course made short circuit because all fuses were out of service on both engines.
My question is, is there a possibility that the Both ECU's are damaged. Is there any safe mode that the ECU triggers and make the engine impossible to start even after having changed all the wiring.
It looks like on both engines the injection is not working, i tried the injection rail after unscrewing it and nothing or not enough at all looks to come out of the injectors.
Does the HP pump runs and can we hear it when we turn the contact on?
Thanks for answering me if you can.

[boscoe99]

Ii have a problem starting my engines..
In fact some bad guys tried to steal my boat mounted with 2 yamaha F115 TLR. they cut the wires and tried to start it, they of course made short circuit because all fuses were out of service on both engines.
My question is, is there a possibility that the Both ECU's are damaged. Is there any safe mode that the ECU triggers and make the engine impossible to start even after having changed all the wiring.
It looks like on both engines the injection is not working, i tried the injection rail after unscrewing it and nothing or not enough at all looks to come out of the injectors.
Does the HP pump runs and can we hear it when we turn the contact on?
Thanks for answering me if you can.

When the key is turned to the ON position the electric fuel pump should run for about 5 seconds. You should be able to hear and feel the pump run if you are close by or have your hand on the VST. If a pressure gauge is installed on the fuel injector rail you should see fuel pressure.

Did you verify that all fuses are in good working order?

Where did they cut wires? In side or out side of the engine cowling? Engine side or boat side of the ten pin connector?

[Kamel333]

They cut the cable outtside the engines near the levers control and start switches. I have changed all fuses because all of them out . I was not able to hear or feel the pump running for 5 seconds when turning the contact on. Moreover I removed the injectors rail on both engines and runnig the starter on each one at a time i checked the flow coming out of the injectors, nearly nothing coming out, i believe the fact is due to the HP pump not runnig and the little amount was due to the mechanical pump.
With the new instruments electronic, square, it shows me maintenance message, I am wondering if the short circuit didnt kill my ECM on both engines, or if the ECM has a kind of safe function that prevent injection due to the short cut done when they tried to start the engines by trying to connect directly the differents wires aafter cutting them, reason why all the fuses on both engines melted.
Thanks

[boscoe99]

They cut the cable outtside the engines near the levers control and start switches. I have changed all fuses because all of them out . I was not able to hear or feel the pump running for 5 seconds when turning the contact on. Moreover I removed the injectors rail on both engines and runnig the starter on each one at a time i checked the flow coming out of the injectors, nearly nothing coming out, i believe the fact is due to the HP pump not runnig and the little amount was due to the mechanical pump.
With the new instruments electronic, square, it shows me maintenance message, I am wondering if the short circuit didnt kill my ECM on both engines, or if the ECM has a kind of safe function that prevent injection due to the short cut done when they tried to start the engines by trying to connect directly the differents wires aafter cutting them, reason why all the fuses on both engines melted.
Thanks

The ECM does not have any sort of safe function that would be attributable to cut wiring. A short in a wire would either blow a fuse, pop a circuit breaker, or damage the wire. It should not effect the ECM.

See if you can find someone that has a 703 control box that you can borrow. Maybe a dealer. Or maybe better yet, see if the dealer has what is called a "boat in a box". Plug the 703 control box, or the boat in a box, to the motor's ten pin connector. I bet the motor will start and run. I am guessing that you have a wiring problem up at the dash.

Now if you are handy with wires and such here is something else that you can do. Disconnect the ten pin coupler at the engine. On the engine side of the coupler, jumper the terminal to the yellow wire to the terminal to the red wire. That will provide power to the motor. You should be able to hear/feel the pump run. Jumper the terminal to the brown wire to the terminal to the red wire and the motor should crank, start and run. Jumper the terminal to the white wire to the terminal for the black wire to stop the motor.


Good luck sorting this out.

[Kamel333]

Thank you for your advises. I found the pumps not running , they were stuck because they didnt run for more than 4 years, after opening and cleaning they went back to normal operation and my 2 engines started and are perfectly running.
Now I have a small problem. I can't get the RPM information of the engines it stays at zero even after having started the engines, I have square tachometers and did the wiring correctly and according to the schematic you sent me last time, do you please have any idea about what could be the problem.
Thanks in advance.

[bajakeith]

four (4) years not running !!

Yikes !! you MUST Replace your impeller's,,,BTW..having water coming out of the Telltale on a hose dosnt mean a Damn thing !! and get rid of all old fuel in the system..... wish Ya luck...