Well guys, LaCannes got a hold of Yamaha about my engine killing the first time you start it in the morning. They currently have no solution to the problem, and those of us who have that problem will have to live with it for now.LaCannes did say that if the service rep comes around they will give me a call so he can take a look at it. 
I guess we will just have to be patient.
Bummer. I understand the frustration.
Thanks for the update. Let us know if you figure anything out. My new boat has a 90 Yamaha and does it.
I will do, Gino!!!!!
I have a 2019 90 SHO and mine does the exact same thing.
My 2018 60hp also does the same thing.
Only once, on the first start of the day. It’s always fine after that.
Also, it only does it when it’s approximately 40 degrees or colder out. It’s never really bothered me as it’s only ever done it one time each day on a few separate occasions.
I thought I remembered reading that it’s a normal thing. When it’s cold it takes a moment for the fuel injection system to compensate and adjust the fuel mixture to what’s required for a cold start.
Basically it’s doing what a choke would accomplish on a carbureted engine.
Im really surprised they couldn’t tell you anything at Yamaha though.
Regardless of whether it’s a normal thing or a common issue they have. You’d think they’d know about it being so many of us are experiencing it.
I believe your problems are in the ECU. I had a 2004 Yamaha f115 that didn’t like to start on cold mornings. I figured it out by taking the ECU off and placing it on the dash of my truck with the heater on high. Drove an hour to the landing, put the ECU back on and it fired up right away and ran all day. When it was cold there was a connection within the ECU that was contracting and when warmed up would expand and make the connection. I ended up biting the bullet and bought a new ECU and never had the problem again. Its worth a try…
I had a 2001 Honda 130 that did this – very similar to grubsons scenario. First start of the day, every day, it would fire, die, then fire up on and run fine. Regardless if it was freezing or 90 degrees, it would die once each day. Occasionally, in cold weather when it would sit a long time between starts – like sturgeon fishing where we would be anchored for many hours, it would do it again. Ran that motor for 17 yrs without a hiccup. Yamaha 250 now and it fires on first crank and keeps running.
Well guys, LaCannes got a hold of Yamaha about my engine killing the first time you start it in the morning. They currently have no solution to the problem, and those of us who have that problem will have to live with it for now.LaCannes did say that if the service rep comes around they will give me a call so he can take a look at it.
I guess we will just have to be patient.
You guys are all going to get banned for making these wild-ass claims about a problem with a Yamaha outboard, and their lack of resolution to the “alleged” concern. If this was Mercury, there’d be protesters circling the building in Fond du Lac.
I guess Japan is too far away? Maybe once the borders re-open they’ll send some Engineers to look at the problem?
HRG
Thats funny HRG. I’ve heard those same stories of customers waiting in the parking lot in Fond du Lac to hassle employees as they left work hoping for resolution to a problem.
On a side note my experience makes me think this is a calibration issue in the ECM not a physical issue with the ECM itself. It just doesn’t sound like it’s actually temp related if I’ve followed these threads correctly. The calibrations in these ECM’s is considerably more complex than I think many people realize, and things as simple as elevation can drastically change what portion of the mapping the engine uses during cold or hot start just as an example. Sorry you’re having the issue, and best advice I can give is don’t let them forget about you and document every conversation you have with the dealer and Yamaha even if it’s just a email that goes unanswered.
a Yamaha outboard with an issue???? You must be mistaken.
On a side note, Hot Runr Guy, I had a 50 Mercury that did the same thing. 
They all have their issues regardless of what some people want to believe. The difference is how well the dealer, and engine manufacturer take care of you.
You guys are all going to get banned for making these wild-ass claims about a problem with a Yamaha outboard, and their lack of resolution to the “alleged” concern. If this was Mercury, there’d be protesters circling the building in Fond du Lac.
Yamaha outboards do NOT have problems. They have undocumented features.
On a side note my experience makes me think this is a calibration issue in the ECM not a physical issue with the ECM itself. It just doesn’t sound like it’s actually temp related if I’ve followed these threads correctly. The calibrations in these ECM’s is considerably more complex than I think many people realize, and things as simple as elevation can drastically change what portion of the mapping the engine uses during cold or hot start just as an example.
Does Yamaha’s ECM allow a connection to the live data? Wouldn’t this theory be pretty easy to test by plugging an engine in and watching the ECM data when the engine dies? Just wondering if/why this hasn’t been tried or if it has, what was the result?
<div class=”d4p-bbt-quote-title”>Hot Runr Guy wrote:</div>
You guys are all going to get banned for making these wild-ass claims about a problem with a Yamaha outboard, and their lack of resolution to the “alleged” concern. If this was Mercury, there’d be protesters circling the building in Fond du Lac.Yamaha outboards do NOT have problems. They have undocumented features.
<div class=”d4p-bbt-quote-title”>hillhiker wrote:</div>
On a side note my experience makes me think this is a calibration issue in the ECM not a physical issue with the ECM itself. It just doesn’t sound like it’s actually temp related if I’ve followed these threads correctly. The calibrations in these ECM’s is considerably more complex than I think many people realize, and things as simple as elevation can drastically change what portion of the mapping the engine uses during cold or hot start just as an example.Does Yamaha’s ECM allow a connection to the live data? Wouldn’t this theory be pretty easy to test by plugging an engine in and watching the ECM data when the engine dies? Just wondering if/why this hasn’t been tried or if it has, what was the result?
I don’t have as much experience with Yamaha compared to others, but I’m almost positive you can see data from the engine. This is pretty much true for all EFI engines it’s just the amount of info the engine manufacturer decides to make available to the mechanic. What complicates things is if the ECM is seeing “good data”, meaning the sensors are reading correctly, things would likely appear normal to the mechanic working with a relatively basic diagnostic program. However when you can dive deeper with say a engineering program you can get into the actual tables within the calibration. Once in there you can see the logic the ECM is using to interpret values from the sensors to determine how much fuel and timing is needed to start and run during given conditions.
Yamaha outboards do NOT have problems. They have undocumented features.
2020 90 SHO. No issues.
You must be logged in to reply to this topic.
I guess we will just have to be patient.
