I developed an alarm issue on one of my engines on the weekend about an hour after going thru some very low water (sandy bottom). I suspected it might be an overheat issue, so I changed both thermostats, cleaned the temperature sensors, and flushed the engine twice with salt away.
The engine pee’s fine but when I speed it up beyond 3200 RPM in neutral it activates an alarm, starts to shake and decreases rpm to idle, I have changed the main fuel filter(from the tank) and checked the water separator on the engine, that did not solve the issue.
Today I started the engine waited about 30 seconds and increased the rpm to 3400, no alarm, raised it to 4100 and let it run for at least 3 minutes, no alarms, only the green oil light was on, I stopped the engine and re started several times, all ok.
A few minutes later I decided to try it again, I noticed that when I first turned the key to the on position there was one short beep, started engine and increased RPM, at 3400 the alarm went off, It was just one long beep, until I stopped the engine, what I did see is that when the alarm activated, the green oil light went out, checked and found I was down almost 2 qts of oil, added oil, but that did not solve the issue. Hope this is not an indication of worn bearings (which I doubt) causing a loss of oil pressure when the oil gets hot, (engines have about 950 hours).
One more point, about 8 weeks ago, I had a water hose burst on the fuel pump assembly that obviously dumped a lot of water back there, my mechanic took the pump out and cleaned and repaired the problem, any chance that has some bearing on my issue, it appears according to the parts diagram that is the area that the oil pressure senders are located in.
My mechanic is gonna have a look in a few days, but I wondered if anyone had encountered anything similar, thanks for any thoughts.
The engine pee’s fine but when I speed it up beyond 3200 RPM in neutral it activates an alarm, starts to shake and decreases rpm to idle, I have changed the main fuel filter(from the tank) and checked the water separator on the engine, that did not solve the issue.
Today I started the engine waited about 30 seconds and increased the rpm to 3400, no alarm, raised it to 4100 and let it run for at least 3 minutes, no alarms, only the green oil light was on, I stopped the engine and re started several times, all ok.
A few minutes later I decided to try it again, I noticed that when I first turned the key to the on position there was one short beep, started engine and increased RPM, at 3400 the alarm went off, It was just one long beep, until I stopped the engine, what I did see is that when the alarm activated, the green oil light went out, checked and found I was down almost 2 qts of oil, added oil, but that did not solve the issue. Hope this is not an indication of worn bearings (which I doubt) causing a loss of oil pressure when the oil gets hot, (engines have about 950 hours).
One more point, about 8 weeks ago, I had a water hose burst on the fuel pump assembly that obviously dumped a lot of water back there, my mechanic took the pump out and cleaned and repaired the problem, any chance that has some bearing on my issue, it appears according to the parts diagram that is the area that the oil pressure senders are located in.
My mechanic is gonna have a look in a few days, but I wondered if anyone had encountered anything similar, thanks for any thoughts.