OVERHEAT / CEL ALARM

[Bowmax]

Hello guys, first post here and new to the Jet Boat world. I just bought brand new 2021 210 FSH. Went to flush port motor, had flush kit installed on port side, ended up starting starboard motor. Rookie mistake I know. Only my 3rd time out on the boat and I'm still getting used to which ignition starts which engine so it sounded like the port motor was running and I had water coming out of on of the pee holes so I thought I was good to go. Well, 2 or 3 minutes later when I went to turn water off and rev motor to get water out and shut down, port motor didn't do anything and thats when I realized the starboard motor was the one running. To top this off, I only had the "Start" battery turned on so my connext screen wasn't on to tell me my motor was overheating. Once I realized everything that was going on, I turned on the "house" battery and connext screen turned on and of course said "turn off starboard engine, consult yamaha dealer". I let the motor cool down for about an hour, connected everything correctly, and flushed the starboard enging properly and everything seems normal, motor didnt sound bad or anything like that, but the CEL is still on and still giving me the "consult yamaha dealer" warning. Dealer is 2 hours away. Do you all think the motor is damaged? Is there a process to clear this CEL with engine starts and stops or something like that? Thanks in advance.

 

[FSH 210 Sport]

Hello guys, first post here and new to the Jet Boat world. I just bought brand new 2021 210 FSH. Went to flush port motor, had flush kit installed on port side, ended up starting starboard motor. Rookie mistake I know. Only my 3rd time out on the boat and I'm still getting used to which ignition starts which engine so it sounded like the port motor was running and I had water coming out of on of the pee holes so I thought I was good to go. Well, 2 or 3 minutes later when I went to turn water off and rev motor to get water out and shut down, port motor didn't do anything and thats when I realized the starboard motor was the one running. To top this off, I only had the "Start" battery turned on so my connext screen wasn't on to tell me my motor was overheating. Once I realized everything that was going on, I turned on the "house" battery and connext screen turned on and of course said "turn off starboard engine, consult yamaha dealer". I let the motor cool down for about an hour, connected everything correctly, and flushed the starboard enging properly and everything seems normal, motor didnt sound bad or anything like that, but the CEL is still on and still giving me the "consult yamaha dealer" warning. Dealer is 2 hours away. Do you all think the motor is damaged? Is there a process to clear this CEL with engine starts and stops or something like that? Thanks in advance.

We all make mistakes !

Last summer I was on the water fishing and drifted into too shallow water landing a fish. Had both motors running and one must have ingested some grass or something clogging the intake.... long story short I got a high temp alarm followed quickly by the same alarm you got, looked over the side and no by pass flow. I turned off the motor and checked the clean out port, nothing in there. Restarted engines and good flow out both bypass ports. Drove around slow for a bit, kept having to silence the alarm. Got back to the dock 20 minutes later and thought well going to have to drive a few hours to the dealer. When I started the engines to put it on the trailer the code was gone. Operated the boat for another 20 hours over the rest of the summer and no issues.

I‘m pretty sure that code will clear with some more time on the engine.

 

[Stang7tl]

Have you checked your oil on that engine? Make sure water didn't back follow from having water running without it running. It started so hydro lock isn't a issue but will still check.

 

[Stang7tl]

maybe you can get a hose splinter so you can run both motors at the same time. When I go to a 255 I will be doing that.

 

[WREKS]

Since you were running water through the non-running port motor, you may want to make sure no water accidentally got into cylinders. The best way to do this would be to remove spark plugs and spin starter without safety tether in place.

 

[Bowmax]

We all make mistakes !

Last summer I was on the water fishing and drifted into too shallow water landing a fish. Had both motors running and one must have ingested some grass or something clogging the intake.... long story short I got a high temp alarm followed quickly by the same alarm you got, looked over the side and no by pass flow. I turned off the motor and checked the clean out port, nothing in there. Restarted engines and good flow out both bypass ports. Drove around slow for a bit, kept having to silence the alarm. Got back to the dock 20 minutes later and thought well going to have to drive a few hours to the dealer. When I started the engines to put it on the trailer the code was gone. Operated the boat for another 20 hours over the rest of the summer and no issues.

I‘m pretty sure that code will clear with some more time on the engine.

Yeah definitely will not be making that mistake again. Do you think I should run it by the dealer and see what they think? Also, a Y-Pipe fitting might be in my future so I can run both engines at the same time so I don't have to worry about this. How long did your engines run overheated?

 

[Bowmax]

Since you were running water through the non-running port motor, you may want to make sure no water accidentally got into cylinders. The best way to do this would be to remove spark plugs and spin starter without safety tether in place.

Thanks for the info. I didn't check the oil yet, but I did eventually start that motor up and flush it. No apparent issues because I ran it for about 3 minutes to flush but I will check the oil after work today.

 

[Bowmax]

Have you checked your oil on that engine? Make sure water didn't back follow from having water running without it running. It started so hydro lock isn't a issue but will still check.

It did start and sounded / acted normal. I am going to pull the dip stick and spark plugs to see if I can see any issues there. Thanks for the help.

 

[FSH 210 Sport]

Yeah definitely will not be making that mistake again. Do you think I should run it by the dealer and see what they think? Also, a Y-Pipe fitting might be in my future so I can run both engines at the same time so I don't have to worry about this. How long did your engines run overheated?

Be careful about running two engines on one hose...that has been discussed here. As long as you have enough volume to give flow out the bypasses you’ll be good. I don’t have enough volume to do that... was going to do the same thing.

Id say the engine ran 3-5 mins before I shut it off to check the clean outs... if they ran fine on the hose, and the other engine started and ran and there’s no water in the oil you are probably good. I’d just go run it. You could try running the alarmed engine again on the hose and I bet that alarm will clear.

And like you, I just felt sick that I may have damaged that motor but after quite a few hours, I’ll revise my estimate now that I think about it to 30 hours after that incident, of running the motors growl like they always have.

 

[Canuckjetboater]

Hello guys, first post here and new to the Jet Boat world. I just bought brand new 2021 210 FSH. Went to flush port motor, had flush kit installed on port side, ended up starting starboard motor.

@Bowmax ..... even though an overheat code clears from your Connext screen it may still be logged in your boat's data base. Yamaha dealers can plug their computer with Yamaha software into your boat and erase the code by scrolling through a couple of screens and clicking where appropriate. Otherwise this will show when you go to sell it some day and you may not want that as it was a minor issue not a major "smokin'" overheat!

 

[Bowmax]

@Bowmax ..... even though an overheat code clears from your Connext screen it may still be logged in your boat's data base. Yamaha dealers can plug their computer with Yamaha software into your boat and erase the code by scrolling through a couple of screens and clicking where appropriate. Otherwise this will show when you go to sell it some day and you may not want that as it was a minor issue not a major "smokin'" overheat!

Thanks for the info Canuck. Hopefully not selling her for a while but def good to know.

 

[FSH 210 Sport]

@Bowmax ..... even though an overheat code clears from your Connext screen it may still be logged in your boat's data base. Yamaha dealers can plug their computer with Yamaha software into your boat and erase the code by scrolling through a couple of screens and clicking where appropriate. Otherwise this will show when you go to sell it some day and you may not want that as it was a minor issue not a major "smokin'" overheat!

Thanks @Canuckjetboater for the dope about the logged fault code.. at some point mine will be at the dealer probably to get valves adjusted / checked and I will have them clear the fault code from my overheat incident.

 

[Matt Phillips]

Here's my overheat on the hose story.

Before going into Lake Tahoe "that shall go through muscle inspection" and on our boats that means starting it up and running 1401 degree water through the engines. on the 242XE, it also means pumping some of that water into each of the bags. Been doing this for years. We typically run the port engine and fill the bags, then while starboard is running, drain.

Well, last year, they were a little slow on the uptake and we ended up doing both fill/drain on the starboard. After about 10 minutes on the hose in 80 degree weather, it threw an overheat alarm. Shut it down, cleaning is done (I got the stickers). I knew what had happened and there's safety margin on these so the chance of something serious happening was pretty low.

got it in the lake and it ran fine but...and this is a BIG BUT...every 5 minutes the Connext system would sound an audible alarm and I'd have to clear it again. Turn the batteries off. Still did it. Wait a while, then unhook the batteries, still did it.

I called the dealer the following week and said that since it was running fine, not to worry about it. They did say that the Connext will stop triggering the alarm after an undetermined number of "trips" which is defined as the batteries being shut off. They also cautioned about running these engines too long on the hose as the drive shafts build up heat when the engine is running. So long as the boat is in the water the heat dissipates in the water and keep it cool. When sitting on the hose on a hot day, the overheat alarm can be triggered by the sensor on the driveline. There's no leaking on the driveline or extra grease so all good.

I went back up the following week to the lake and when I started it, It threw the alarm. I unplugged the batteries overnight and when I came back to the boat the next day the alarm didn't keep going off.

The code is still there. If you go into Sys Diagnostics and setting (I believe that's where it is) you can still see it. Once I find a PC (we are a Mac house) I'll plug int the YDS reader and clear that code.

So...moral of the story is when there's an overheat alarm on the hose, it may not be in the engine, it apparently can be in the driveling as well.

 

[FSH 210 Sport]

Here's my overheat on the hose story.

Before going into Lake Tahoe "that shall go through muscle inspection" and on our boats that means starting it up and running 1401 degree water through the engines. on the 242XE, it also means pumping some of that water into each of the bags. Been doing this for years. We typically run the port engine and fill the bags, then while starboard is running, drain.

Well, last year, they were a little slow on the uptake and we ended up doing both fill/drain on the starboard. After about 10 minutes on the hose in 80 degree weather, it threw an overheat alarm. Shut it down, cleaning is done (I got the stickers). I knew what had happened and there's safety margin on these so the chance of something serious happening was pretty low.

got it in the lake and it ran fine but...and this is a BIG BUT...every 5 minutes the Connext system would sound an audible alarm and I'd have to clear it again. Turn the batteries off. Still did it. Wait a while, then unhook the batteries, still did it.

I called the dealer the following week and said that since it was running fine, not to worry about it. They did say that the Connext will stop triggering the alarm after an undetermined number of "trips" which is defined as the batteries being shut off. They also cautioned about running these engines too long on the hose as the drive shafts build up heat when the engine is running. So long as the boat is in the water the heat dissipates in the water and keep it cool. When sitting on the hose on a hot day, the overheat alarm can be triggered by the sensor on the driveline. There's no leaking on the driveline or extra grease so all good.

I went back up the following week to the lake and when I started it, It threw the alarm. I unplugged the batteries overnight and when I came back to the boat the next day the alarm didn't keep going off.

The code is still there. If you go into Sys Diagnostics and setting (I believe that's where it is) you can still see it. Once I find a PC (we are a Mac house) I'll plug int the YDS reader and clear that code.

So...moral of the story is when there's an overheat alarm on the hose, it may not be in the engine, it apparently can be in the driveling as well.

A friend of mine warned me about the driveline heat build up... I may get a splitter and put it directly under the intake grate so it is spray up into that area to provide some additional cooling to the drive line. Thank you for the post!!!!


By the way.. I love Lake Tahoe, such a beautiful place!

 

[Matt Phillips]

If installing a splitter I’d worry about enough water pressure into the engines while on the hose. Another alternative could be to run 5-8 minutes on one side, then the other, then like another 3-5 on the first. After 10-12 minutes though I’d imagine you will flush about as much as you’re going to flush.

 

[1WetBoat]

They also cautioned about running these engines too long on the hose as the drive shafts build up heat when the engine is running. So long as the boat is in the water the heat dissipates in the water and keep it cool. When sitting on the hose on a hot day, the overheat alarm can be triggered by the sensor on the driveline. There's no leaking on the driveline or extra grease so all good.
...So...moral of the story is when there's an overheat alarm on the hose, it may not be in the engine, it apparently can be in the driveling as well.

Did he say where this sensor is for the driveline/driveshaft? I don't think I have ever heard of our driveshaft's overheating when ran on the hose. I do know that is an issue on the SeaDoo's due to the carbon seal. They can overheat and warp which starts to leak if they are ran out of the water, but never heard of that on a Yamaha.