6y5-8350t-83 tach wiring diagram

[Joediveguy]

The motor with the square connectors will use the harness that is depicted in the illustration in my post #11. Unless you string a single wire for the trim.

The motor with the round connectors uses the same trim/oil harness (from the motor to the gauge) but adapter harness are needed. See the following illustration.



Now that I think about it, both of your motors use a three wire trim sender. The sender gets its voltage from the tachometer. Via the orange wire.

Boscoe, thanks for all the information. Can I ask you for one more thing to put this to bed?

Can you tell me what the part numbers are for the wiring harnesses that I will need for each engine? One for the SQUARE connectors and one for the ROUND connectors? That way I can just order the parts and be done with it, hopefully.

Thanks, Joe

[boscoe99]

Yes one motor has round and the other has square connectors.
Can you tell by the pictures which harness I will need?

The motor with the square connectors will use the harness that is depicted in the illustration in my post #11. Unless you string a single wire for the trim.

The motor with the round connectors uses the same trim/oil harness (from the motor to the gauge) but adapter harness are needed. See the following illustration.



Now that I think about it, both of your motors use a three wire trim sender. The sender gets its voltage from the tachometer. Via the orange wire.

[Joediveguy]

Or does one motor have square connectors and the other motor have round connectors?

Yes one motor has round and the other has square connectors.
Can you tell by the pictures which harness I will need?

[boscoe99]

Engine #1...........

Is the motor with the data plate the same motor that is shown in your other posts? The photo with the connectors that are shown?

Do both motors have square nylon connectors? Or does one motor have square connectors and the other motor have round connectors?

[Joediveguy]

I hope you have not been putting 4 stroke oil in the oil tanks

No, the PO disconnected the oilers and I have been premixing 2 stroke oil in with the gas.

Hey, I guess I did know they were two stroke motors all along.

Man, Alzheimer's is a bitch!

[99yam40]

I hope you have not been putting 4 stroke oil in the oil tanks

[Joediveguy]

L200 is not a 4 stroke motor

No?

I have misidentified these things from the get go then....I thought that if they had oil injectors, they were 4 stroke.

My bad..

[99yam40]

Just to be clear, these are 4 stroke motors.

L200 is not a 4 stroke motor

[Joediveguy]

A 1994 through 2004 two stroke connected to a digital M/F tachometer would look like this.

Just to be clear, these are 4 stroke motors.

[Joediveguy]

Is there any other place on the engine that may have another data plate other than the transom bracket?

[Joediveguy]

Engine #2

Engine #2.............

[Joediveguy]

Engine #1

Engine #1...........

[Joediveguy]

OK, so it turns out both engines are not the same.
Engine #1 has a Data Plate, however, Engine #2 does not, it has worn off. I recall being able to read it when I got it a few years back when I was verifying the title., however, it is gone now.

The wiring harnesses are different for both motors. The original wiring harness picture I posted was for Engine # 2

I will post pictures of both engines shortly....

[boscoe99]

Here is what I am trying to do and what I have to work with:

I have an older boat, 2001 Sport Cat, with even older motors, twin 1995 Yamaha 200's (L200TXRQ). The boat was extensively MacGyvered by the previous owner and I have been working on unfixing what he "fixed". Most notably, he removed the Oiler system and it is cost prohibitive to rebuild it, so now I just premix the oil and gas.

The old gauges were sun beaten to the point where I couldn't read the Tach's, so I replaced them with 6Y5-8350T-83's. I hooked up the Yellow, Green and Black wires. The blue has no corresponding lead on the engine side wiring harness, that I could find. The tach works but the trim does not (one bar flashing). The DIP switches are set as follows:
SW1 = Off
SW2 = Off
SW3 = On

So, my question is, do I absolutely need the wiring harness adapter, or can I jump the Pink wire from the Engine side harness to the pink wire in the tach four wire plug, to get the trim working?

I am attempting to upload pics from my Album....

Verify your model number. An L200TXRQ is a 1992 model year motor. The connectors shown in your photos indicate the model to be 1994 or later.

A 1994 through 2004 two stroke connected to a digital M/F tachometer would look like this.


I would simply buy the Yamaha harness to make the connection between the motor and the tachometer. You will then have the over temperature functionality and the trim functionality. But it is your boat and motor. If you want to string a single wire from the motor to the tachometer to get the trim information then you can do that.

The pink wire in the main engine ten pin harness is for activation of the warning buzzer. Not for the trim. The pink for the trim comes up from the trim/oil harness. Yamaha uses the same colour for two functions. Plus others.

[Joediveguy]

for whatever reason, your pic's are not showing up on my computer, but they show up on my phone?!