NMEA connection form Garmin 126SV to Yamaha F175

Under the cowling you will see a white block connector with either a white cap on the block or a wire with block attached to it.

I’d start there.

Pretty simple. Nmea starter kit with the Yamaha Garmin interface (j1939?) cable. No “black box” it’s just the nmea “t’s”. The hardest part is running the wires through to the engine….

Thanks for the info. I uncovered the boat today to look at the motor connection. Seems straight forward but running the wire from the motor thru the loom will be a pain. Ordered a Garmin start kit and a motor cable with a tee.

I’ve got to do a service on the motor so I’ll try to wrap all of that up and the install on a weekend soon. Going to have to undo stuff as I have all three Garmin units on a 14.8v lithium. Read up on the voltage issues that will cause so I’ve got to rewire the 126 to the starter battery.

It’s a small diameter wire. Shouldn’t be a problem finding a spot through the Yamaha grommet.

Got the network installed. The engine grommet wasn’t difficult to get out but was a pita getting it back in place. Everything seems to be functioning ok. Based on the power setup I have, I thought I was going to need a power separator but the 126 won’t connect to the engine with it installed. Wish Garmin would allow some screen configurations like the sonar and charts but I can live with what is displayed. Surprised I have as many hours on the engine as I do. I figured I was still well under 300 but I’m north of that. The addition of a kicker will help keep the hours down on the main outboard now.

I just took the cable tie off of the grommet and opened it up enough to fit the engine interface cable in an open channel.
Put a new cable tie on and done.
Nothing removed.
Lowrance to Yamaha

Must be different than my 175. There is a mesh sheath held in place buy a zip tie but there are two bolts hold the huge, multi-channel grommet in the engine cowling. Had to pull it out to separate the grommet to open a spare channel. Squishing it all back together and pushing it back into the cowling was a pita. Took about 20 mins to do.