Forum: WHALER
  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  NMEA 2000 Connector in Yamaha F70LA

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   NMEA 2000 Connector in Yamaha F70LA
DVollrath posted 02-20-2012 02:49 PM ET (US)   Profile for DVollrath   Send Email to DVollrath  
Hi Folks--point me to a photo or diagram which shows the location of the NMEA 2000 connection inside of a Yamaha F70LA outboard engine. I have the Lowrance 120-37 interface cable, but I'm not clear where it connects inside of the motor. I cannot find a Yamaha document which specifies the location. Thanks--Dennis

[Later this image was provided. It shows the location of the NMEA-2000 network port on the Yamaha F70LA:]

jimh posted 02-20-2012 03:30 PM ET (US)     Profile for jimh  Send Email to jimh     
It appears that you need to find the Yamaha Rigging Sheet (with designation YMBS) to get more details about the NMEA-2000 rigging on a Yamaha F70LA. I tried to search for the YMBS document but could not find it available on-line, although it is often referenced in other Yamaha literature on-line. This is something of a problem: Yamaha posts dozens of documents on-line which all insist you must refer to another document--which is not on-line.

You might try to find the engine service literature. It should have a wiring diagram that will show the location of the NMEA-2000 port and its connector.

And, at the risk of sounding silly, you might give the engine a very close visual inspection. You may be able to identify the NMEA-2000 connector by its mating to the cable you want to connect to it, although I caution that perhaps an intermediate cable might be need as an adaptor; that sort of wiring seems to be used on some engines.

I am encouraged that the F70LA has a NMEA-2000 network port. I hope you can resolve the problem of locating it, and I look forward to seeing and hearing more about connecting to it. That a 70-HP engine now is available with NMEA-2000 engine data output is very interesting, and it shows Yamaha is extending their technology.

ASIDE: Yamaha does not identify their models of outboard engine by a model year designator. The suffix "A" in the model designator F70LA specifies the model epoch (in this case "first generation") of the F70 series.

jimh posted 02-20-2012 03:36 PM ET (US)     Profile for jimh  Send Email to jimh     
Using the REFERENCE article about outboard engine manuals on-line at

http://continuouswave.com/whaler/reference/ownersManuals.html

I was able to find the owner's manual for the F70LA at

http://www.yamaha-motor.com/assets/service/manuals/1/ F70LA_6CJL-1000001~Current_LIT-18626-08-72_1808.pdf

I downloaded the manual, and then using Acrobat Reader I searched its contents for the string "NMEA"; there was no occurrence of "NMEA" in the manual. I guess Yamaha does not consider connecting the engine to a NMEA-2000 network to be a task to be performed by the owner.

Morgan posted 02-22-2012 12:38 PM ET (US)     Profile for Morgan    
DVollrath....Were you able to figure this out? How much was the interface cable? I'll be purchasing a Yamaha F70 and I'm leaning towards the lowrance HDS-8 GEN2. I'm wondering what it will cost to get both of these linked up.
jimh posted 02-22-2012 02:08 PM ET (US)     Profile for jimh  Send Email to jimh     
The cost to connect an engine to a NMEA-2000 network and a multifunction display should be as follows:

--network starter kit: $50

--specific network-to-engine cable, and network-T (which is usually inclulded): $75 to $100

--generic network-to-display cable; $25 (if needed--usually you get one in the starter kit)


The cost is very low compared to the benefit.

DVollrath posted 02-22-2012 02:09 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Morgan,
I have made some progress. I drove to the dealer I bought the motor from, and they pointed out the correct connector. I can email a photo of it, or perhaps I'll create a web page.
As far as testing out the configuration, I will not have that opportunity for a while yet. The motor and boat are remote from my home, and I only get up there infrequently. One point of concern is that the cable I have has 4 conductors, and the NMEA 2000 connector has only 2.
The cable I have is the Lowrance 120-37, and it cost around $80. I was also advised to purchase the Lowrance NMEA 2000 network starter kit, which includes a selection of cables, terminators, connectors, and power tap. This was $48. It appears that I can still use the NMEA 2000 network in conjunction with my current Yamaha digital multifunction tach, as this uses a separate connector in the motor. This is attractive to me because of the redundancy as well as minimizing the busyness of the display on the Lowrance.

Tim (Tedious) has been helpful with this process as well. I believe his setup is slightly different though, as he has a Command Link network, and added a NMEA 2000 network.

I hope this helps.

Dennis

Morgan posted 02-22-2012 05:42 PM ET (US)     Profile for Morgan    
Jimh...Thanks for the detailed breakdown of the costs involved, this is very helpful. I was under the impression that this would be much more expensive.

Dennis...Thanks for sharing how you are progressing with getting everything hooked up. I will be purchasing a Yamaha F70 and was leaning towards not doing this, but after reading your post I think I'm going to do it.

My boat currently has no gauges. I was thinking of adding a tach with hour meter, but I'm not sure if its necessary. Would you guys add a tach at this point or just run everything through the GPS/Fishfinder?

DVollrath posted 02-22-2012 05:57 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Joe,
I'm not sure I would add the tach if I did not already own one. I believe the engine hours are one of the functions read by the NMEA 2K setup. I likely will add the tach onto my console, but it is as much to keep it from looking so blank as it is for redundancy or chartplotter display clutter.

Dennis

jimh posted 02-22-2012 10:03 PM ET (US)     Profile for jimh  Send Email to jimh     
In the NMEA-2000 protocol there are two parameter groups that are associated with engine data. Most engines which advertise that they have a NMEA-2000 port will send the two parameters. You can see the details of the data that can be sent in my article in the REFERENCE section on the topic:

NMEA-2000 Parameter Groups
http://continuouswave.com/whaler/reference/PGN.html

The engine sends the parameter groups to the network. If you connect a NMEA-2000 device to the network that can receive the engine parameters, you can anticipate that the device will be able to display all or some of the parameters in the parameter group the engine is sending.

There are just two parameter groups related to engines:

--PGN 127488: Engine Parameters, Rapid Update

--PGN 127489: Engine Parameters, Dynamic

The parameter groups include some data that perhaps won't be sent from a particular engine. And there is no guarantee that a particular device will be able to display all of the data being sent You have to look for details from the manufacturer of the devices to learn exactly what data will be sent and exactly what data will be displayed.

DVollrath posted 02-23-2012 12:58 AM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Jim,
Thanks for the link. I found a PDF from Lowrance dated 1/15/2009 which lists the data available from Yamaha engines at that time as:

NMEA 2000 Yamaha Engines output the following standard data:
• Engine RPM
• Boost Pressure
• Engine Trim: 2006 and later
• Oil Pressure
• Engine Temp: 2006 and later
• Alternator Voltage
• Fuel Rate
• Hours Used
• Water Pressure
• Fuel Economy – if a speed source is on the network
• Some Diagnostics – not sure which ones as they do not publish this


I view the oil pressure, voltage, water pressure, and fuel rate to be particularly useful to me.

Thanks.

Dennis

Morgan posted 02-23-2012 10:26 AM ET (US)     Profile for Morgan    
I spoke to a Yamaha outboard mechanic last night and he said it is particualry hard to get the Yamaha F70 hooked up with NEMA 2000 equiptment. He said he has worked Yamaha booths at recent trade shows and the other people there have also experienced issues with this as well.

He said when he did this with the some larger Yamaha outboards recently and could only get certian data to show up. This could be related to what Jimh is saying about the display unit.

All I'm doing here is relaying the opinion of one mechanic. I'm trying to determine myself if I want to go this route. He made it sound like it's not that simple.

DVollrath posted 02-23-2012 10:45 AM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Morgan,
Good information. I guess I'll need to be prepared to fiddle with it a bit more than I'd hoped. Having the gauge, I can just fall back to it if need be, but the other functions made possible by the NMEA 2K link are pretty attractive.

Did the mechanic single out the F70 as particularly difficult, or was he speaking of Yamaha in general?

Thanks.

Dennis

Morgan posted 02-23-2012 12:12 PM ET (US)     Profile for Morgan    
I believe he was speaking of Yamaha's in general, but I will verify with him to make sure.

It doesn't matter to you and me, but he said Honda's are much easier to hook up with NEMA 2000.

jimh posted 02-23-2012 02:22 PM ET (US)     Profile for jimh  Send Email to jimh     
Evinrude E-TEC engines were the first outboard engines to have NMEA-2000, beginning at least five years ago. There is no difficulty, mystery, or lack or support in connecting an E-TEC outboard engine to a NMEA-2000 network.
tmann45 posted 02-23-2012 08:50 PM ET (US)     Profile for tmann45  Send Email to tmann45     
If you have Yamaha Command Link gauges installed, it is a simple 2-conductor cable to hook up to a NMEA 2000 network.
If you don't have a NMEA 2000 network, then a 4-conductor cable directly to a Lowrance HDS will work. The part numbers are MAR-003 for the 2-conductor for use with a NMEA 2000 network and MAR-002 for going directly to a Lowrance HDS. If you don't have Command Link gauges installed, I can't help. I don't know if you can hook up directly to a Garmin unit.
jimh posted 02-26-2012 11:08 AM ET (US)     Profile for jimh  Send Email to jimh     
The standard interface to NMEA-2000 is a five-pole connector, with two poles for signal, two poles for power, and one pole for shield or ground. The connector at the interface to a device can be different. When speaking of "a simple two-conductor cable" the inference would be there are only the two signal conductors in the cable.

The initial inquiry was in regard to the Lowrance 120-37 interface cable. This cable appears to have the standard DeviceNET connector at one end, for connection to the network, and a specialized connector at the other end, for connection to the Yamaha network interface. I believe that cable is shown here

It is hard to see the details of the cable and connector at the Yamaha end. It looks like more than a two-pole connector is used.

The recommendation to connect the engine interface directly to a display device is questionable. Although such a connection might work, it is not in accordance with recommended network wiring for NMEA-2000 devices. Typically, once you have a NMEA-2000 display device, you will find more than one other device to attach to it, so you might as well construct a small network and follow the recommended installation practices.

Here is some data about the cables mentioned:

http://www.blueheronmarine.com/ Maretron-MARE-003-Yamaha-Command-Link-Network-Interface-6324

http://www.blueheronmarine.com/ Maretron-MARE-002-Yamaha-Command-Link-Device-Interface-6323

The difference in these cables may be only in the way the power conductors are handled or perhaps the inclusion of a terminating resistor. I looked closely at both Maretron cables, and each seems to have four conductors. I see red, black (power) and blue, white (signal) wires in both cases. Perhaps someone can elaborate more about what is different about these Maretron cables. Possibly the "direct" cable (Maretron 002) includes a 60-ohm terminating resistor to properly condition the signal interface, and the "network" cable (Maretron 003) properly omits the resistor. That is my guess. But, again, I recommend building a small network, as you will likely find it useful in the future.

jimh posted 02-26-2012 12:37 PM ET (US)     Profile for jimh  Send Email to jimh     
Re the difference between the two Maretron cables: the light just went on. There is a very distinct difference in the cables; the gender of the connector at the NMEA-2000 end of the cable is opposite.

In a NMEA-2000 backbone the T-connector portion to which one attaches a device has a female gender and the electrical contacts are sockets. A cable from a device to the network therefore has a male gender and contains pins. This convention keeps the power poles from being exposed on bare pins at the source of the power.

A NMEA-2000 device (for example an HDS series display device) will typically have a network connector which is a male gender and has exposed pins.

Therefore the Maretron cable for Yamaha to NMEA-2000 network connection (i.e. the MARE-003) has a male connector with pins at the network end. This connector will mate with the normal network T-connector.

A Maretron cable for Yamaha direct to device (like an HDS) (i.e., the MARE-002) has a female connector with sockets at the network end. This connector would mate directly to a device.

I hope this sheds some light on the mystery.

Getting back to the Lowrance cable mentioned in the initial article, the Lowrance 120-37 Yamaha engine interface cable, that cable is designed to connect to a network T-Connector.

DVollrath posted 02-26-2012 02:59 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Jim,
The Lowrance 120-37 cable kit includes a tee connector for tapping into the network backbone. BOE Marine also advised that a NMEA 2000 starter kit was required, which includes terminators, cable, and power tap. My plan is to construct a terminated backbone with tee taps for the Lowrance, the Yamaha, and perhaps power. The reason I hedge on power is that some Lowrance documents show an integrated power connector for the display unit and the NMEA 2000 network. My HDS-7 power cable only has leads for display power and NMEA 0183. I plan on calling Lowrance to confirm, but it appears to me I need to supply power to the NMEA 2000 separately.

I will certainly submit a write-up detailing the process that (hopefully!) ends up working, if others would find this useful.

Thanks.

Dennis


jimh posted 02-26-2012 03:21 PM ET (US)     Profile for jimh  Send Email to jimh     
The HDS units will not power the network. The network should have its own power connection. Do not become mislead about this by legacy products or fishermen.
tmann45 posted 02-26-2012 11:02 PM ET (US)     Profile for tmann45  Send Email to tmann45     
The Yamaha Command Link network has power just like a NMEA 2000 network, therefore when connecting a Command Link network to a NMEA network only the two data wires are used in the Maretron cable (Yamaha does not use the shield, their cables are only 4-conductor). You do not want to have power from the Command Link network and the NMEA network connected. The MAR-002 cable includes the two power conductors to supply power from the Command Link network to the HDS unit since there is no NMEA 2000 network to supply power to the HDS unit. The Yamaha Command Link network is the same as a NMEA 2000 network but uses different connectors. I made my own adapter to connect my Garmin NMEA 2000 network to my Command Link network using a N2K drop cable and a CL cable using only the blue and white data wires (Yamaha and N2K use same color code). With the other half of each cable I made a direct connection from my CL network to my HDS unit using all 4-wires, 2-data and 2-power. So I had Yamaha data going to my Garmin unit on the NMEA 2000 network and the same Yamaha data going to my HDS unit completely independent from the NMEA network, worked great.
tmann45 posted 02-26-2012 11:12 PM ET (US)     Profile for tmann45  Send Email to tmann45     
To put it simply, you can connect a Yamaha engine that has a Command Link network hub to a N2K network with a MAR-003 2-conductor cable or directly to a HDS unit with a MAR-002 4-conductor cable. Nothing fishy about it.
jimh posted 02-27-2012 08:29 AM ET (US)     Profile for jimh  Send Email to jimh     
Perhaps you can make a sketch of how you have interconnected the Yamaha Command Link Network and a NMEA-2000 network.

The initial inquiry is in regard to connecting the Yamaha engine to a NMEA-2000 network. This is a different problem than interconnecting a Yamaha Command Link Network to a NMEA-2000 network.

ASIDE: I can see how the use of two cables, one a NMEA-2000 cable and the other a Command Link Network cable, would provide you with a four connectors of the proper gender to accomplish the two interconnections you made. That would also be good to show in a sketch. When talking about electrical wiring it is difficult to make a clear presentation in a narrative form. A schematic or pictorial diagram is a much better way to show the details of wiring. If you can create a simple sketch or schematic, it would be useful to present as a way to explain what you have accomplished. Give that some consideration. We can include the diagram in

tmann45 posted 02-27-2012 09:04 AM ET (US)     Profile for tmann45  Send Email to tmann45     
Jim, since you are familiar with the N2K network layout, it should be easy to visualize connecting to a Yamaha Command Link network since it is the same as a N2K network but uses a hub instead of tees and different connectors instead of device net for the drop and backbone cables.

Now that I see the cable in question, it is the same as a MAR-002 that connects directly from the Yamaha hub to a HDS unit, exactly the same as a N2K drop cable but different connection on one end. You use this cable if you don't have a NMEA 2000 network; you go directly from the Command Link hub (think N2K network) to the HDS. It is a 4-conductor cable, 2-power, 2-data. The terminating resistors are on the Command Link (remember N2K) network.

Now if you want to go to a N2K network from a Command Link network, this is the same as having two separate N2K networks. You only have a 2-conductor data connection. Each network has its own power supply and terminating resistors. You use the MAR-003 2-conductor cable to make this connection.

Sorry if I gave the impression of connecting the HDS unit directly to the "engine interface", I should have made it clear with connecting to a Command Link network, which you have if you have Command Link gauges.

tmann45 posted 02-27-2012 09:18 AM ET (US)     Profile for tmann45  Send Email to tmann45     
Back to the original problem, you will need a Main Bus Wire to go from the engine to a Command Link Hub, the Hub, two terminating resistors, and a power wire. Your Lowrance 120-37 cable will plug into the hub and the HDS unit. You can also plug Yamaha Command Link gauges into the hub using Pigtail wires.

See http://www.simyamaha.com/category_s/1833.htm for Yamaha parts needed.

jimh posted 02-27-2012 09:22 AM ET (US)     Profile for jimh  Send Email to jimh     
Thanks for the narrative.

It occurs to me that if you can connect the Yamaha Command Link Network to a NMEA-2000 network with just a direct connection of the signal wires, the two networks are really the same network. That is, the Yamaha Command Link Network is really just a NMEA-2000 network using different wiring devices. The data on the network must be in the same configuration or protocol, otherwise you would need some sort of electronic device to connect them. From the description given of inter-wiring of the two networks, they sound like they are just one network.

The method of connecting them sounds suspect, as in NMEA-2000 there is a particular wiring topology that is supposed to be observed, and it is not proper to add long spurs to the network backbone. Given that on most small boats the length of the network backbone is about 15-feet maximum, it is not surprising that a random connection of the two network backbones will work.

It is unfortunate that Yamaha (and others) have adopted their own name and own wiring devices for implementation of what appears to be just the standard NMEA-2000 networking. These deviations from the standard are what cause problems for boat owners to implement modern networking on their boats.

jimh posted 02-27-2012 09:26 AM ET (US)     Profile for jimh  Send Email to jimh     
Also--I think we are still looking for advice on the location of the network connector on the Yamaha F70LA outboard engine.
jimh posted 02-27-2012 09:30 AM ET (US)     Profile for jimh  Send Email to jimh     
And also, it looks like the greatest source of confusion is whether the boat in question will construct a network using the Yamaha Command Link components or the standard NMEA-2000 DeviceNET components.

If the boat uses the Yamaha Command Link components to create the network, you connect the HDS to the Yamaha network.

If the boat uses NMEA-2000 DeviceNET components, you connect the Yamaha engine to the DeviceNET NMEA-2000 network.

I think tmann45's boat may have two networks which he has interconnected using a method of his own invention.

tmann45 posted 02-27-2012 09:57 AM ET (US)     Profile for tmann45  Send Email to tmann45     
I should have said the networks are the same electrically, just different hardware. You can connect the HDS directly to the Command Link network using the 120-37 adapter cable or create a second network using N2K hardware, a different cable connecting the two networks and connect the HDS to the N2K network.
quote:
I think tmann45's boat may have two networks which he has interconnected using a method of his own invention.

Yes I acutally have more than two networks running but none of them connected by my own invention. It took a lot of digging to figure out that the Command Link network is just a N2K network with different hardware. So the connections are the same, you just have to buy the $120 Maretron cables or the $250 Yamaha Interface device or build your own, like you do Jim.
DVollrath posted 02-27-2012 03:25 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
I've made some progress gathering information. I drove down to the dealer who sold me my motor. They pointed out the Command Link connector, which is used by the Lowrance cable to connect to the NMEA 2K network. The annotated photo of my engine is:

Since this is a different connector than is used by my tach, I will be able to use both the Lowrance and the Yamaha tach independently.


I also called up Lowrance technical support. They were very helpful, and sent me a document describing the connections.

This shows the requirements of the NMEA 2000 network construction for my particular situation, including the power connection. This document also gives guidance for setting up the HDS unit to display the engine data.

Now I just need to get the boat in a state to be able to test all of this out.

Dennis

jimh posted 02-27-2012 08:25 PM ET (US)     Profile for jimh  Send Email to jimh     
Thanks for the information. The Lowrance literature shows that the proper way to connect two NETWORKS is with an electronic gateway. You should not just wire them together.
DVollrath posted 02-27-2012 09:07 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Jim,
quote:
The Lowrance literature shows that the proper way to connect two NETWORKS is with an electronic gateway. You should not just wire them together

My situation is described on the top of page 2 of the document. I do not have a Command Link network implemented, so the Lowrance 120-37 cable connects directly to the engine connector. No need to implement a Command Link network with a gateway to NMEA-2000. This will save a few dollars.

I agree that if you already have a Command Link network implemented on your boat and want to connect to a NMEA-2000 network, a gateway is required as shown on page 3.

Thanks again.

Dennis

jimh posted 02-27-2012 10:12 PM ET (US)     Profile for jimh  Send Email to jimh     
You can also join two segments of a network that use different wiring devices together. You can also power each segment separately if you isolate the power. You just need to only terminate the far end of each network and join them in the middle. What you should not do is to make two separate networks with terminations at each end, and then join them together somewhere in the middle.

A NMEA-2000 network can be rather long--much longer than any small boat. It is no problem to have to network segments with different wiring. For example, you could have one end of the network set up with the Yahama wiring components. Then, where a terminator would normally go, you connect that network to a NMEA-2000 network with DeviceNet wiring. If each segment has its own power, just connect the signal wires and the shield. On the DeviceNet segment you terminate the far end. This makes a proper network with a single backbone (although made with two types of devices) and a termination at each end.

jimh posted 02-28-2012 08:35 AM ET (US)     Profile for jimh  Send Email to jimh     
The Lowrance document gives important details about the Yamaha digital system. There are two distinct type of Yamaha networks:

--Command Link

--Command Link Plus

A Yamaha Command Link network can be connected to a NMEA-2000 network by use of a gateway. Lowrance mentions the product, MAR-GTWAY-ML-09. The gateway costs about $200.

The Yamaha wiring method uses a multi-port hub to attach devices to the network. You can see the hub pictured in the Lowrance literature.

A Yamaha Command Link Plus network is a different beast. This network is used with the larger Yamaha engines that have electronic controls. The Command LInk Plus network can also be bridged to NMEA-2000, but a different gateway is required. The Lowrance literature mentions the MAR-GTWAY-KT-00 product. This gateway costs about $240.

DVollrath posted 07-09-2012 02:24 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
I was finally in a position to test out my NMEA-2000 network yesterday, with a Yamaha F70 and Lowrance HDS-7. The connections were as described on page 1 of the document
http://continuouswave.com/whaler/reference/Yamaha/ Yamaha_Engine_NMEA_2000_Connection.pdf , which does not have a Command Link network or devices. My network consists of:
NMEA 2000 backbone with terminators at the ends
Yamaha F70LA connected to network via Lowrance 120-37
Lowrance HDS-7 connected using 15' cable
Power tap

The HDS-7 detected the network and Yamaha automatically with no intervention required on my part. Functionality I have observed thus far includes:
--engine RPM displayed down to single digit resolution
--engine temperature observed several degree variation
--alternator voltage, reasonable values, running and not
--fuel economy, cruise values of 7 to 8-MPG
--trim, does not seem to work, displaying a constant value

I also have some alarms enabled, but have not observed any of them active, fortunately...

This is installed on my 1988 Montauk. All in all, it was a pretty straight forward installation and bring-up. I'm pleased with the result.

Dennis

conch posted 07-11-2012 02:12 PM ET (US)     Profile for conch  Send Email to conch     
Dennis page 4 of the document you referance in your last post mentions an additional step required to enable the trim gauge to work.
Chuck
DVollrath posted 07-11-2012 02:29 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Chuck,
I have never had this connected to an analog trim gauge, so it is not clear that this is the problem. It is something to check out though. Thanks for the tip!

Dennis

conch posted 07-11-2012 04:41 PM ET (US)     Profile for conch  Send Email to conch     
No problem, there is also an asterisk note on the page one table bottom stating digital trim to be enabled by dealer.

Thanks for the follow up posting,that is the motor I would love to have on my 15 Sport.
Chuck

DVollrath posted 07-11-2012 05:20 PM ET (US)     Profile for DVollrath  Send Email to DVollrath     
Hi Chuck,
Poked around the internet a bit more. Perhaps I'll try messing with the 2 pink wires that are referenced as trim connections for NMEA 2000 this weekend. What could I possible hurt? Yikes, I don't believe I said that...

Thanks again.

Dennis

jimh posted 07-12-2012 07:54 AM ET (US)     Profile for jimh  Send Email to jimh     
I don't have any experience with the Yamaha trim gauge wiring, but typically in an outboard engine the current for the trim sender is supplied through the trim gauge. If you don't have an external trim gauge, there won't be any current supplied to the trim sender. If an electronic gauge is to be used, typically there is a series resistor installed in a wiring harness that supplied current from the 12-Volt battery. I would suspect that something like that will be found in the Yamaha engine, particularly the 70-HP model which is more likely to be rigged with conventional gauges than with fully-electronic gauges.

You better consult with a knowledgeable Yamaha technician about the TRIM circuit on your Yamaha outboard engine and how it is configured for the electronic gauges, as it might be quite different than the typical arrangement I described above.

Post New Topic  Post Reply
Hop to:


Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.