Author Topic: Will NMEA 2000 data show accurate engine RPM?  (Read 465 times)

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Online Fisherdv

Will NMEA 2000 data show accurate engine RPM?
« on: January 04, 2018, 02:45:54 PM »
May replace my FF/GPS soon and would really like to have the motor networked via NMEA 2000 to get fuel burn, engine data etc. Will the data shown include engine RPM that’s more accurate than an analog RPM gauge? Would a Lowrance HDS 7 be a good choice? I currently have a Lowrance elite 5 that’s not NMEA 2000 compatible
2018, Sea Chaser 16, Honda 60HP

Offline Threeweight

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #1 on: January 04, 2018, 03:26:50 PM »
It shows 100% accurate data, as it's pulling it from the engine's control computer (ECM or engine control module).

It's more accurate than the analog tachs of old.
Former Sea Chaser 17 owner
Wild Card, Hewescraft Ocean Pro 220, Honda 225 and 9.9

“Never turn your back on fear. It should always be in front of you, like a thing that might have to be killed.”
       --- Hunter S. Thompson

Online Chief of the Boat

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #2 on: January 04, 2018, 04:13:01 PM »
I am very happy with my Lowrance HDS-7 and 5 Gen 2's I have networked. 
1994 Sea Explorer 1511 loves whitecaps 2010 Yamaha F-70 2012 Yamaha F-8 with a  Fixed SaltBoss Bracket Lowrance HDS-5 & 7 Gen 2 Standard Horizon Fixed VHF 2150 with AIS

Offline Markshoreline

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #3 on: January 04, 2018, 04:22:03 PM »
I have a digital tach and the Garmin Nema data is exactly the same.
2002 Sea Ranger HT 21, Yamaha 150, Yamaha 9.9

Online Fisherdv

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #4 on: January 04, 2018, 08:32:38 PM »
I also like the Lowrance, why? I guess it’s cause that’s what I’m used to. I also like the bottom contours and depth on the mapping. It seems pretty accurate and a must for me when navigating shallow areas of the bay, especially on a low tide
2018, Sea Chaser 16, Honda 60HP

Offline DevMah

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #5 on: January 04, 2018, 10:03:32 PM »
My HDS 9 Gen 3 is accurate also... I have the Yamaha command link and the numbers on my Lowerance match my Yamaha gauges.

Dev

2015 21' Sea Ranger
2015 Yamaha F150
2013 Mercury 9.9 Bigfoot 4 blade
2012 Lund 1650SS  w 2012 60HP Mercury-Sold

Online Fisherdv

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #6 on: January 06, 2018, 10:29:24 AM »
I am very happy with my Lowrance HDS-7 and 5 Gen 2's I have networked. 

This is exactly what I’m looking for. RPM, Fuel burn, engine temp, etc. on my FF readout. So do I just need a NMEA 2000 compatible FF/GPS and a NMEA 2000 cable to connect to my motor? Is that all the accessories required to do it?
2018, Sea Chaser 16, Honda 60HP

Online Chief of the Boat

1994 Sea Explorer 1511 loves whitecaps 2010 Yamaha F-70 2012 Yamaha F-8 with a  Fixed SaltBoss Bracket Lowrance HDS-5 & 7 Gen 2 Standard Horizon Fixed VHF 2150 with AIS

Offline ATGEP

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #8 on: January 06, 2018, 10:36:30 AM »
I am fairly certain you need a "network". There are NMEA 2000 starter kits that will suffice. The network needs power, 2 t fittings and termination caps. Thats how its wired  on my boat. Not sure if you can go directly to the head unit with the NMEA cable.


Online Fisherdv

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #10 on: January 06, 2018, 10:42:32 AM »
I am fairly certain you need a "network". There are NMEA 2000 starter kits that will suffice. The network needs power, 2 t fittings and termination caps. Thats how its wired  on my boat. Not sure if you can go directly to the head unit with the NMEA cable.
Thx, I’m sure a question or two will come up when I’m ready to wire it up
2018, Sea Chaser 16, Honda 60HP

Online Chief of the Boat

1994 Sea Explorer 1511 loves whitecaps 2010 Yamaha F-70 2012 Yamaha F-8 with a  Fixed SaltBoss Bracket Lowrance HDS-5 & 7 Gen 2 Standard Horizon Fixed VHF 2150 with AIS

Offline DevMah

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #12 on: January 06, 2018, 04:31:05 PM »
Here is a link to a install on a 60hp Honda NEMA cable

https://m.youtube.com/watch?v=1Lo7K46Hgkg


My Yammy was direct plug and play.



Dev
2015 21' Sea Ranger
2015 Yamaha F150
2013 Mercury 9.9 Bigfoot 4 blade
2012 Lund 1650SS  w 2012 60HP Mercury-Sold

Offline sfever

Re: Will NMEA 2000 data show accurate engine RPM?
« Reply #13 on: January 06, 2018, 07:49:22 PM »
The biggest issue you may have is just getting the cable through the cable boots since the hook up is pretty easy. Use plenty of "lube" and you should be ok ). Think there are some good threads somewhere talking about how you tape a smaller wire to the end of the nema cable to get it started through the cable boot so you can pull it through. Had to re-tape my "starter" wire after I pulled it off the first try but with enough lube and tape it finally went through both boots and the rest was easy.