Babin Farms
Jetboaters Admiral
- Messages
- 3,598
- Reaction score
- 11,733
- Points
- 477
- Location
- Lower Alabama
- Boat Make
- Yamaha
- Year
- 2009
- Boat Model
- AR
- Boat Length
- 23
My problems started last season on our last outing doing the Starved Rock to Peoria run. Part way back to Starved Rock the port engine acted like it dropped a cylinder and the overheat light came on even though the pissers were both working. Low on power and the exhaust didn't have the typical whine, it was more of a rumble so I checked the oil and other basics, couldn't figure it out so we limped back, put it on the trailer and headed home. The boat sat until this spring when I was able to finally take a look at it to figure out the issue. I hooked up the YDS and did not have any current codes so with the help of a couple forum members we've been trying to figure this out. Going with the overheat warning I pulled both of the impellers, checked them over, checked the inlet strainer, liners, sealant and anything else but could not find an issue. Ran it on the hose and got an overheat warning after a couple minutes so I checked the oil again, pulled the spark plugs and found #3 to be fouled so I put a good, old plug from the prior year and the engine ran a lot smoother and no more overheat warning. Still trying to figure out why a fouled plug would trigger an overheat and the only thing we can think of is that there is a temp sensor close to #3 cyl and without the exhaust pressure from the fuel detonation it's not pushing the cooling water fast enough away from the engine/sensor. After my findings I changed out all 8 spark plugs and both thermostats, ran it on the hose and had no issues. Problem solved.......so I thought.
After figuring out the issues we were finally able to get out on the water for the first time this season last Sunday. We cruised around enough to use 1/4 tank of fuel but I started noticing that the port engine's exhaust was sounding different again. This time it had just a slight rumble that most people wouldn't have even noticed so we headed in, loaded up and went home. I pulled the spark plugs figuring that #3 was going to be fouled again but this time #2 was the culprit but this time it looked like it was straight out of the box when the other 3 were a good cardboard brown so my thought was a bad plug. Swapped out #2 & #3 plugs and cylinder #2 was getting the plug wet. At this point I thought maybe bad coil so I swapped them out and still nothing changed. Next I hooked up the YDS and did a spark test and all was good on that engine which led me to believe that I have an injector sticking so I checked the oil and it was gassy smelling and was overfull. The best way to verify this is not easy at all but I swapped the ECM's and the problem followed the ECM. Now it's figuring out which is the best route to take with the ECM, repair, replace with used(if I can find one) or just buy new. Contacted https://www.regulatorrectifier.com/ and it looks like about 3-4 weeks for repairs and waiting to hear back from Carmo Electronics, The place for parts or electronics for your Motorbike Quad Scooter Car or Jetski. I have read thread after thread on this issue but if anyone has any other sources please share.
Edit: Looking at the email I received from regulatorrectifiers they are Carmousa
After figuring out the issues we were finally able to get out on the water for the first time this season last Sunday. We cruised around enough to use 1/4 tank of fuel but I started noticing that the port engine's exhaust was sounding different again. This time it had just a slight rumble that most people wouldn't have even noticed so we headed in, loaded up and went home. I pulled the spark plugs figuring that #3 was going to be fouled again but this time #2 was the culprit but this time it looked like it was straight out of the box when the other 3 were a good cardboard brown so my thought was a bad plug. Swapped out #2 & #3 plugs and cylinder #2 was getting the plug wet. At this point I thought maybe bad coil so I swapped them out and still nothing changed. Next I hooked up the YDS and did a spark test and all was good on that engine which led me to believe that I have an injector sticking so I checked the oil and it was gassy smelling and was overfull. The best way to verify this is not easy at all but I swapped the ECM's and the problem followed the ECM. Now it's figuring out which is the best route to take with the ECM, repair, replace with used(if I can find one) or just buy new. Contacted https://www.regulatorrectifier.com/ and it looks like about 3-4 weeks for repairs and waiting to hear back from Carmo Electronics, The place for parts or electronics for your Motorbike Quad Scooter Car or Jetski. I have read thread after thread on this issue but if anyone has any other sources please share.
Edit: Looking at the email I received from regulatorrectifiers they are Carmousa
