Jaybeaux
Well-Known Member
- Jan 3, 2016
- 2,053
- Boat Info
- 2006 Sea Ray 48
Naught On Call
- Engines
- Cummins QSC-540s with V-Drives
11 KW Onan Genset
Kinda what I thought. Thanks for the reply!
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Currently underway returning from a trip on one motor. Was running at 2200 rpm then alarm and zero oil pressure on port motor. Not getting a reading on the block gauges either. Oil is quarter way into the hash on the dipstick. Any ideas?
OkPump is a mechanical gear setup.
You have three oil pressure sensors on each engine. One is the gauge at the helm. The second is a gauge mounted on the engine right in the middle. The third is a no pressure sensor connected to the System Monitor That sounds an alarm. If you get low pressure from any two of those three, you've most likely truly lost pressure. I've lost one before and it was only a broken sender wire.Currently underway returning from a trip on one motor. Was running at 2200 rpm then alarm and zero oil pressure on port motor. Not getting a reading on the block gauges either. Oil is quarter way into the hash on the dipstick. Any ideas?
I shut the motor down. The alarm sound and I saw a zero reading at the helm and on the one mounted to the motor.You have three oil pressure sensors on each engine. One is the gauge at the helm. The second is a gauge mounted on the engine right in the middle. The third is a no pressure sensor connected to the System Monitor That sounds an alarm. If you get low pressure from any two of those three, you've most likely truly lost pressure. I've lost one before and it was only a broken sender wire.
Did the alarm sound and zero pressure reading while the engine was running? Or did the alarm sound and oil pressure gauge go to zero because the engine shut down?
They most likely didn't. He probably actually temporarily lost oil pressure. Maybe oil pressure release valve got stuck open (i am guessing there is one) or sump pickup screen got clogged (I am guessing there is one). As you can see I just have guesses.Something still doesn't sound right. How could you have all sending units fail at the same time?
They most likely didn't. He probably actually temporarily lost oil pressure. Maybe oil pressure release valve got stuck open (i am guessing there is one) or sump pickup screen got clogged (I am guessing there is one). As you can see I just have guesses.
Hi all, looked at a nice 04 420DA today with a pair of 6CTA 450's. Engines look very clean and have maintenance history, one owner, overall appear well taken care of. Two things stood out to me I'd like your opinion on:
- The stern facing section of the engine where what I believe is the belt cover had a little bit of fine black 'spray' on the engine. This was on both sides. I know at some point I've read something about dampers on these engines but I'd think thats on the v-drive side, or could it be worn belt material?
- The exhaust manifold where it attaches to the head - what looks like surface rust on the manifold exhaust passages (not the head). Its about the only place I see rust on the engine, and the boat has never been in salt. Maybe its just the iron surface rusting over time, anyone else see anything like that on their engines?
If we move forward a certified cummins tech is lined up for a full day of engine surveys but these were a few things I immediately noticed. That, and surprisingly how much room you have to move around them in a 420 - the ER hatch is huge!
The exhaust manifold where it attaches to the head - what looks like surface rust on the manifold exhaust passages (not the head). Its about the only place I see rust on the engine, and the boat has never been in salt. Maybe its just the iron surface rusting over time, anyone else see anything like that on their engines?
I agree1) Belt dust - Normal
2) gets really hot there, burns off the paint - Again, normal