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After 20 minutes motoring the engine cuts out. The engine…

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After 20 minutes motoring the...
After 20 minutes motoring the engine cuts out. The engine will then not turn over. I have hot wired the solinoid and the engine turns over indicating plenty of battery power but with the key on it will not fire left for 20 minutes and it turns over and runs 4 another 20 or so minutes and same again
Submitted: 2 years ago.Category: Boat
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Answered in 3 days by:
2/3/2016
Marine Mechanic: Noel Schembri, Marine Technician replied 2 years ago
Noel Schembri
Noel Schembri, Marine Technician
Category: Boat
Satisfied Customers: 1,955
Experience: Advanced technical diploma
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Hello my name is ***** ***** I will assist you. will the engine turn over again after some time? Are there any alarms / flashlights in gauges when it shuts down?

Noel

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Customer reply replied 2 years ago
The engine turns over and starts after about 20 minutes. There are no alarms or warning lights there is still 12 volts at engine as when the solinoid is bypassed the engine turns over but still will not fire
Marine Mechanic: Noel Schembri, Marine Technician replied 2 years ago

Ok the problem you are describing seems to be related to dirty injectors. I suggest you first start by removing the injectors and getting them cleaned with ultrasonic. Also replace the spark plugs if they have not been replaced for a long time. If the problem persists then you would need to get someone with a diagnostic computer to check all the sensors.

Noel

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Customer reply replied 2 years ago
How do dirty injectors cause the starter not to turn over after the engine stops?
Marine Mechanic: Noel Schembri, Marine Technician replied 2 years ago

Ok I misunderstood your reply as I tought the engine turns over but does not start. In your situation it looks like after about 20 mins the ecu is loosing power. At this stage ut could be a variety of things from a loose wire to an overheating ecu... what I suggest you do is to inspect all wiring for loose connections and if.the problem persists then you would need to get the ecu out and checked

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