When navigation/fish finding options just won't work. Here's my solution.

[billw6560]

I'll have to get back to you on this. I don't know exactly what all I have access to, other than the few gauges I tried to setup that were not responsive/dead, showing no data (i.e. oil pressure, etc).

 

[billw6560]

I was able to get down to the boat today, and did some testing to see what data is actually available from the Yamaha F90LB. As seen below (sorry for the poor picture quality), the associated Yamaha NMEA 2000 Data Table shows what's supposed to be available, but in actuality, not all data can be displayed. Referring to the Test Status table, there's NO data for anything related to the engine's Oil system. On the gauge assignment menu (not seen here), it lists multiple options for the "Engine" category, but as seen, Fuel Pressure, Oil Pressure, Trim, and Water Pressure cannot be displayed. Note though that the the Trim/Tilt and Fuel Level, while available on the consoles analog gauges (apparently driven by a separate analog data buss), are not shown on the Garmin via N2K data.

Besides the "Engine" catagory, there's other separate categories of gauge assignment options, like Pressure, Levels, etc. Of course, NONE of these work (I tried them all). I'm assuming that this is probably related to the optional "Command Link" system.

 

[Potomacbassin’]

NMEA2000 and 2013 Yamaha F90 problem - The Hull Truth - Boating and Fishing Forum

Marine Electronics Forum - NMEA2000 and 2013 Yamaha F90 problem - I have a nmea2000 network on my boat using dual Garmin GMI10s for displays. The Yamaha is connected directly to the backbone with the lowrance 120-37 cable. I am getting RPM, trim, volts, tempature, hours, fuel flow and even boost...

www.thehulltruth.com

It might be possible that the engine does not have an oil pressure sensor. For the temp sensor, I found a forum thread somewhere (so who knows if accurate) that notes the F90 was only a bi-metal switch that would make/break for high temp alarm so that could indicate why no real-time data. The F90 manual (see pic) also seems to infer this when referring to low pressure and high temp alarms only, not levels.

What a bummer, you'd think with a $10K motor they would have this data available. Maybe their customer base over the years just didn't demand it.

 

[billw6560]

As for water temperature, I DO get the actual temp. The gauge showed between 140-145° F. River water is running in the low 80's (just a guess}. As for oil pressure, you may be right, BUT, oil pressure sensors cost under $5 in OEM pricing. You'd think the engine's ECU would be smart enough to use oil pressure as a means to shut down the engine if the oil pressure was too low. This is the ONLY use of a pressure switch as a GO-NOGO status, however, these are vary inaccurate, where a pressure sensor is a much better method.

Yes, for a $10K motor, you'd think adding one should be a no brainer. A pressure switch is just about useless, especially if you don't have a smart MFD. There's no idiot lights on our consoles. I don't think I'll get too much further with Garmin. They'll just say that if the data was available, they'd be able to display it. Next step is contacting Yamaha.

 

[Potomacbassin’]

Well good luck in your journey, even if you end up in the same place as today this will surely help others down the road!

 

[billw6560]

OK, here's the deal. I just got off the phone with Yamaha, and the N2K data shown in the table below is all that's available for the F90LB. Data like Fuel and Oil Pressure is only available on the F115 and up. Water pressure is only available if you have Yamaha's Command Link system installed. He did say that there is an Oil Pressure Switch in the motor, so if oil runs low, it will shut down the engine. I did request some additional N2K and electrical info, and if it's relevant, I'll try to pass it on.

 

[Potomacbassin’]

OK, here's the deal. I just got off the phone with Yamaha, and the N2K data shown in the table below is all that's available for the F90LB. Data like Fuel and Oil Pressure is only available on the F115 and up. Water pressure is only available if you have Yamaha's Command Link system installed. He did say that there is an Oil Pressure Switch in the motor, so if oil runs low, it will shut down the engine. I did request some additional N2K and electrical info, and if it's relevant, I'll try to pass it on.

View attachment 30491

Sounds like an excuse to upgrade the HP!

Thanks for the update!