Humm from both engines with key on (engines off) in E-Series boat

[Adrenalinejunky]

Pretty hefty price tag. Not sure there is a problem with them but I can not think of anything else that I have owned which has had a similar condition.

 

[Julian]

So what the heck is in a throttle body that would buzz like it does???

 

[buckbuck]

Makes me think Yamaha has a voltage leak that is messing with the throttle assembly on some of the E series boats. We need more input from the E series guys. Anyone else with this issue?
@veedubtek you got any ideas?

 

[Adrenalinejunky]

So what the heck is in a throttle body that would buzz like it does???

Probably an actuator for the electric throttle. I imagine it is what controls the butterfly in the absence of cables and holds it in near closed position similar to choke while the engine is off. I am going to check my truck tomorrow to see if it does it too with key on and engine off.

 

[Mainah]

The non-eseries also have electronic throttle bodies but don't make the same noise. The servo on the throttle body is receiveing a signal from the ecu in order fo it to be making noise. So why would it do this on an eseries with the engines off?

Perhaps it has something to do with the push button start. Perhaps it has some to do with the electronic binnicles. Perhaps the ecu needs a sw fix. In any case I would keep telling my dealer and once enough people complain to their dealers and the dealers complain to Yamaha you might get a fix.

 

[Julian]

The non-eseries also have electronic throttle bodies but don't make the same noise. The servo on the throttle body is receiveing a signal from the ecu in order fo it to be making noise. So why would it do this on an eseries with the engines off?

Perhaps it has something to do with the push button start. Perhaps it has some to do with the electronic binnicles. Perhaps the ecu needs a sw fix. In any case I would keep telling my dealer and once enough people complain to their dealers and the dealers complain to Yamaha you might get a fix.

Totally agree! Which is why this forum rocks and why I'm glad Yamaha reads it!

 

[Adrenalinejunky]

I have seen on a few car forums where other vehicles that have drive by wire experience a similar sound from the "throttle plate actuator" inside the throttle body.

@Mainah, do you know if the non e-series have cables running to the throttle bodies? I can not say that I have had the chance to look at one other than my own.

 

[Mainah]

@Adrenalinejunky check out this thread for some photos https://jetboaters.net/threads/installing-perfect-pass.869/

Both the eseries and the non eseries have used the very same throttle body and plate actuator made by mikuni since the introduction of the 1.8l. The non eseries do have cables but they go to sending units as can be see in the referenced post that in turn send a signal to the ecu that then controls the throttle body, fuel injectors, timing, etc.

 

[subysti]

I don't have an E series but I can say that from and electronics point of view the humming is not good. Either the motors are constantly adjusting position and vibrating or they're drawing too much current. When they're humming are they warm? If they keep humming I'm thinking they will fail quickly.

 

[seadude]

The "key" difference is when the engines are shut off on the e-series certain systems have been left "on" versus turning the standard key off which shuts these things off (as the e-series does when the key is turned off). I doubt there is any real need to be concerned about the activated electronics beyond the buzz noise and some extra current draw.

Yep I noticed the buzing sound the first time out when in float mode. On another thread someone told me about holding the nav light button for a few seconds while the key is off to boot up Conex...

If this works, it may make sense to save some power for long term float modes... or just to kill that damn buzz!

 

[Adrenalinejunky]

I have been trying to make a connection with this noise and my power loss. It seems to be louder on the starboard side but may just seem that way because it is near the wall. But... It is also the starboard engine that has lost about 300 rpms whem compared with the port engine during wot runs. I put new plugs in and should be on the lake around 1:00 today to test the result.

 

[Adrenalinejunky]

FYI, plugs did not make a difference

 

[buckbuck]

I would like to suggest that there is a solid state relay somewhere that is leaking voltage causing the hum.

 

[Kane]

I don't know if it's the same hum but mine is through the speakers when I don't have a source playing music. I wrote it off as a Bluetooth humm but goes away as soon as the music starts even if I turn the volume all the way down....

 

[Julian]

I don't know if it's the same hum but mine is through the speakers when I don't have a source playing music. I wrote it off as a Bluetooth humm but goes away as soon as the music starts even if I turn the volume all the way down....

Interesting...is it only the tower speakers, or do all the speakers hum?

 

[Kane]

I can't say for sure if it was all, but for sure soundbar. I'll check it out next weekend and get back.

 

[Adrenalinejunky]

I noticed today that if I turn the key to the off position and hold the light button on the connext system it will boot up without power to the throttle bodies so I do not get the sound.

 

[subysti]

Maybe you weren't aware of that feature. They keys do. It need to be on for stereo and such. Just do what you did, press the light button below the connex screen to use the stereo while in float mode.

 

[Adrenalinejunky]

I usually just turn off the engines.


The negative with turning the key off is that it has to reboot after the key is turned off and make the annoying beep along with the exhaust fans.

 

[Julian]

@Adrenalinejunky yup.....I learned that one in the last couple of weeks. Better than having the buzz from the engines, but makes @Mainah 's 8 second buzz fix even more important because you have to shut down connext and restart it each time you want to switch from driving to floating.