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Hey Everyone...
I just bought this boat about a month ago and it has just over 720 hours. I have read hundreds of threads on here and haven't quite found the solution to my problem yet...
Here is my dilemma..
The motor fires up right away and runs very smoothly, no hesitation, surging or missing. The problem occurs most often if I am at a lower RPM for an extended amount of time. Generally, between 30min and 90 min under 1200 RPMS. The motor begins to run rough for a couple of seconds then will cut out and die. I have saved it from dieing a couple times if I hammer the throttle when I hear it get rough. Once it dies once and I get it started I can generally replicate the problem after only a few min. All gauges look perfectly normal at the point of failure and the fuel pressure on top of the FCC is between 35-40.
Now, this is where it gets a bit confusing so bear with me... How it acts after a kill is very inconsistent.
When this problem first occurred the motor would not fire or would fire and die almost instantly resulting in me having to paddle off the lake. Then if I let it sit for 10 to 30 min it would fire and run perfectly again.
Once I experienced this a few times, I read a lot of threads and talked to several mechanics... this lead me to replace the fuel filter, both relays, Low Pressure Fuel pump, TFI, plugs, plug wires, and the Impeller.
I did one thing at a time and would go hop on the lake and test it out with no change.. the motor is still dying.
The one difference I have noticed is that now after replacing those parts when it dies the motor will fire back up right after a kill and if I pick the RPMs up it will stay generally running (I have had it die once upon acceleration after a kill).
I have also experienced it fire right up and run perfectly again even at low RPMS right after a kill.
This is one of the strangest issues I have ever experienced with a motor..
To recap.... Perfectly running motor randomly starts to run rough after an extended amount of time at low RPM's and will kill. How it acts after has differed.. Have seen everything from not firing at all, fire and die instantly, fire and die in a few min, to fire and run perfectly the rest of the day.
The Kill switch is bypassed and I have replaced the relays, impeller, plugs, plug wires, TFI, Low pressure fuel pump, and fuel filter.
Also, I have drained the FCC several times after a kill to check for water in the fuel and the fuel has been clean every time.
Any help you guys can provide is beyond appreciated as this issue has me stumped.
Thank you!!
I just bought this boat about a month ago and it has just over 720 hours. I have read hundreds of threads on here and haven't quite found the solution to my problem yet...
Here is my dilemma..
The motor fires up right away and runs very smoothly, no hesitation, surging or missing. The problem occurs most often if I am at a lower RPM for an extended amount of time. Generally, between 30min and 90 min under 1200 RPMS. The motor begins to run rough for a couple of seconds then will cut out and die. I have saved it from dieing a couple times if I hammer the throttle when I hear it get rough. Once it dies once and I get it started I can generally replicate the problem after only a few min. All gauges look perfectly normal at the point of failure and the fuel pressure on top of the FCC is between 35-40.
Now, this is where it gets a bit confusing so bear with me... How it acts after a kill is very inconsistent.
When this problem first occurred the motor would not fire or would fire and die almost instantly resulting in me having to paddle off the lake. Then if I let it sit for 10 to 30 min it would fire and run perfectly again.
Once I experienced this a few times, I read a lot of threads and talked to several mechanics... this lead me to replace the fuel filter, both relays, Low Pressure Fuel pump, TFI, plugs, plug wires, and the Impeller.
I did one thing at a time and would go hop on the lake and test it out with no change.. the motor is still dying.
The one difference I have noticed is that now after replacing those parts when it dies the motor will fire back up right after a kill and if I pick the RPMs up it will stay generally running (I have had it die once upon acceleration after a kill).
I have also experienced it fire right up and run perfectly again even at low RPMS right after a kill.
This is one of the strangest issues I have ever experienced with a motor..
To recap.... Perfectly running motor randomly starts to run rough after an extended amount of time at low RPM's and will kill. How it acts after has differed.. Have seen everything from not firing at all, fire and die instantly, fire and die in a few min, to fire and run perfectly the rest of the day.
The Kill switch is bypassed and I have replaced the relays, impeller, plugs, plug wires, TFI, Low pressure fuel pump, and fuel filter.
Also, I have drained the FCC several times after a kill to check for water in the fuel and the fuel has been clean every time.
Any help you guys can provide is beyond appreciated as this issue has me stumped.
Thank you!!
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