2012 sx210 overheat warning

[Jvaboats]

I have a 2012 sx 210 and my port engine is showing an overheat light when I run high rpms for about 2 t 5 minutes. At idle it is just fine. Here is what I have checked and done so far, changed oil, changed spark plugs, changed temp sensor on block, checked intake screen, checked impellers, checked clean outs, and checked the water flow indicators. All seem good. It's got good water coming out the exhaust and thermostat outlet and the pee hole. This is my first yamaha and I'm usually good and figuring out problem and fixing them but I'm stumped on this one. Any suggestions is greatly appreciated. I want to try and have her ready for memorial day.

 

[swatski]

@itsdgm

 

[Jvaboats]

Update. I checked my air filter and it has oil on it. Will that cause it to throw the overheat light? Also I took off the exhaust manifold and it is clean for being a salt water engine.

 

[itsdgm]

Welcome @Jvaboats. Glad that you joined, hopefully you'll find the answer to help fix your issue.

I'm not sure where you're located and where you use the boat. Salt water vs fresh water. Also, how long have you owned the boat? How long has this issue been going on? Did it start before or after any work/maintenance?

Sounds like you've checked most of the usual suspects.

Other things to consider would be:
1. Check the thermostat and the sacrificial anode just to see what they show. (Any sand or corrosion)
2. Check the engine with YDS (Yamaha Diagnostic Software). That would show you what temps it's actually reading, and which sensor it is.

Hope you figure it out soon

 

[Scottintexas]

Glad to have you on board,
Had you ever looked at the air filter before to know if it was clean before this issue?
usually oil on the air filter means it was over filled, did you put back in the amount of oil you took out ? did you check the oil level on the water?

I might suggest either the YDS or checking with a infrared thermometer on the water to get a better idea where it might be getting hot,

Do you have the MR-1 or 1.8L engines ?

 

[Jvaboats]

Thanks for the tips and I figured it out after taking the exhaust manifold off. It was packed full of salt. I dug it out for a couple of hours and poured vinegar in it and let it sit overnight and tested it yesterday afternoon and it ran perfect. After the weekend I'm probably going to do the same for the other engine. I'm sure it's just the same.

 

[Scottintexas]

Can you take some pictures and tell us your process
It would be a good addition for our FAQ

 

[Oriol]

I have an AR 210 2014 Yamaha and have the same issue in both engines, every time go 5000 RPM any engine show Overheating... they are 60 hours engines, always flushed with Salt Away every time I use my boat... Do you think is salt inside the motor ???...If it is the problem, what the hell is SALT AWAY....???

Thank you for any help please...

 

[Tom Duignan]

Welcome @Jvaboats. Glad that you joined, hopefully you'll find the answer to help fix your issue.

I'm not sure where you're located and where you use the boat. Salt water vs fresh water. Also, how long have you owned the boat? How long has this issue been going on? Did it start before or after any work/maintenance?

Sounds like you've checked most of the usual suspects.

Other things to consider would be:
1. Check the thermostat and the sacrificial anode just to see what they show. (Any sand or corrosion)
2. Check the engine with YDS (Yamaha Diagnostic Software). That would show you what temps it's actually reading, and which sensor it is.

Hope you figure it out soon

I wonder if you can explain or illustrate to me where the thermostats are located on a 2010 yamaha sx210 jet boat. I have tried everything but changing them to resolve the issue with my daughter's boat. Thank You
Tom

 

[swatski]

I wonder if you can explain or illustrate to me where the thermostats are located on a 2010 yamaha sx210 jet boat. I have tried everything but changing them to resolve the issue with my daughter's boat. Thank You
Tom

I can't really help, but looking at microfiche - looks like #6, 9 parts?
https://www.babbittsonline.com/oemparts/a/yam/5003a16ff870021f60a11fe0/electrical-2


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[Tom Duignan]

I can't really help, but looking at microfiche - looks like #6, 9 parts?
https://www.babbittsonline.com/oemparts/a/yam/5003a16ff870021f60a11fe0/electrical-2
View attachment 84017

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Thank you, Any help I get from you people is appreciated.
Thanks
Tom

 

[itsdgm]

I wonder if you can explain or illustrate to me where the thermostats are located on a 2010 yamaha sx210 jet boat. I have tried everything but changing them to resolve the issue with my daughter's boat. Thank You
Tom

The thermostats (part #29) are located inside a housing on the starboard side of the oil cooler. This is the best pic that i could find on my phone. Off the top of my head, you can follow the black hose (part #26) that comes off the top of the valve cover back towards the side of the oil cooler. If memory serves me correct, that leads directly to the thermostat housing.

Hope that helps.

 

[Tom Duignan]

The thermostats (part #29) are located inside a housing on the starboard side of the oil cooler. This is the best pic that i could find on my phone. Off the top of my head, you can follow the black hose (part #26) that comes off the top of the valve cover back towards the side of the oil cooler. If memory serves me correct, that leads directly to the thermostat housing.

Hope that helps.

View attachment 84022
View attachment 84023

Thank You so much! I checked the chart and photo you provided and found the housing which contains the thermostat. Didn't even know they were there. I took both of them out and the ran the boat for an hour with no problem.
Thank You
Tom

 

[Tom Duignan]

Does anyone have any idea why a check engine light would be on one engine on a yamaha sx210. I don't think it's overheating because the thermostats are out and the light comes on immediately. Thank You, Tom

 

[vxooxv]

Does anyone have any idea why a check engine light would be on one engine on a yamaha sx210. I don't think it's overheating because the thermostats are out and the light comes on immediately. Thank You, Tom

The check engine light or the temp light?

 

[Tom Duignan]

The check engine light or the temp light?

The check engine light or the temp light?

It was the temperature light. I found out that in this particular case that, even though I changed the heat sensor, the computer had to be reset to shut the light off. $65.00 for five minutes on the computer to reset!!

 

[JoseCuervo]

It was the temperature light. I found out that in this particular case that, even though I changed the heat sensor, the computer had to be reset to shut the light off. $65.00 for five minutes on the computer to reset!!

you had to take it to a Yamaha shop to reset the computer ? or how to reset the computer ?

 

[WREKS]

@JoseCuervo It should reset itself. If it does not, try disconnecting and reconnecting the battery.

 

[Tom Duignan]

you had to take it to a Yamaha shop to reset the computer ? or how to reset the computer ?

Yes, I had to take it to a shop. Tried disconnecting batteries but to no avail. It had to be reset by the computer at the shop. Good Luck