2007 ar230 one engine loses spark when hot or running for 15 mins

[Eric Monte]

Hey I have a 2007 ar230 and my starboard side motor runs perfect for about 15 to 20 minutes and then just dies and loses spark until i wait about 10 minutes and then will start right back up perfect for another 20 mins.. help please!!

 

[bronze_10]

I had a sea too jet ski that would do that long ago... turned out it was the coil pack.. not sure where the spark comes from on the mr1.

 

[Eric Monte]

It has 4 individual coils so I'm doubting that all are bad or am I wrong assuming that

 

[veedubtek]

Worthless input likely, as I have no idea what the MR1 uses for engine management. But, on a typical car, I'd just about guarantee you have a bad crankshaft position sensor.

 

[Scottintexas]

Where are you at?
Do you have a yds to read the engine?

 

[Eric Monte]

I am in maple shade nj

 

[Julian]

Moved to General Discussion from Welcome Aboard.

 

[itsdgm]

@Eric Monte welcome aboard and sorry to hear about your issue. That's kind of an unusual problem, I haven't hear a description of an issue that fades in and out like that. However, the good news is that you have all of the necessary parts for diagnosing your issue sitting right there on the other engine. YDS (Yamaha Diagnostic Software) would probably be the best way to figure out the issue. But if you don't have YDS, and you have some mechanical skills, For a situation like this, I'd swap the coil packs, then test run it, then as many sensors ( like the one @veedubtek suggested) and see if the issue jumps to the other engine. If it does, you could swap a few back until through the process of elimination figure out which one it is. Another thing that comes to mind that could overheat, then reset might be the fuel pump. They're pretty easy to swap from side to side in order to diagnose also.

 

[Eric Monte]

Yea I ordered a stator assembly with crank sensors because that's just way yo hard to swap so I'll throw that back together and if the problem persists I'll start swapping easy things .. also when it dies and I try to unsuccessfully start it I smell a lot of fuel so it should still be spark at that point correct?

 

[jcyamaharider]

Yea I ordered a stator assembly with crank sensors because that's just way yo hard to swap so I'll throw that back together and if the problem persists I'll start swapping easy things .. also when it dies and I try to unsuccessfully start it I smell a lot of fuel so it should still be spark at that point correct?

Not necessarily, could be flooded.

 

[itsdgm]

I

Yea I ordered a stator assembly with crank sensors because that's just way yo hard to swap so I'll throw that back together and if the problem persists I'll start swapping easy things .. also when it dies and I try to unsuccessfully start it I smell a lot of fuel so it should still be spark at that point correct?

It could be something as simple as an ignition switch or a lanyard switch. That would disable the ignition but still allow cranking.

Double check all of your battery connections and the ground wires between both engines and from the battery to engine block of the affected engine.

 

[Matt Phillips]

If you're smelling a lot of fuel, it could also be starving for fuel. A couple of years ago, I smelled fuel right at the end of the season, then again when I started art on the hose at the house. I didn't think too much about it. Then when going out for the first time, I backed the 232 off the trailer and parked at the dock. I then smelled fuel again. I popped the engine hatch, looked between the engines and there was a cup or two of gas between the engines.

As was mentioned above, one nice thing about twins is to start looking for differences between the two. Well, on the port side, the fuel line hose clamp came loose and the fuel pump was basically causing the leak where the fuel line goes into the intake. Yamaha uses a one-time hose clamp on those, but luckily hose clamps are readily found about everywhere.

Anyway, just something else ya might want to check.