No oil pressure after engine warm up
08-12-2012, 01:32 PM
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No oil pressure after engine warm up
I am having issues with my starboard engine oil pressure dropping to almost 0 once the engine is warmed up. Oil level is good, no water or fuel in oil. Engine shut down last night on its own due to low pressure. Hope I didn't mess up engine. Engine only has 380 hrs on it. Its a 1995 502 mag EFI. Thanks for the help
08-12-2012, 01:43 PM
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You got issues. I about guarantee you will have to pull the motor. I wouldn't use it anymore.
On a off chance you may want to try a mechanical gage to make sure it is dropping but I think it shutting down already confirms that.
On a off chance you may want to try a mechanical gage to make sure it is dropping but I think it shutting down already confirms that.
08-12-2012, 02:06 PM
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When we were kids and didn't have a clue. Getting a motor to run was the only goal. Had a couple junkers that would run with 5 to 7 psi. They didn't last long but would have stayed around for a while if we didn't beat the crap out of them. You / boats don't have that option. You need 10psi per 1000rpm's. If not you will be spinning a bearing before to long.
Could be as simple as a broken oil pump or shaft. If you keep running it with low oil pres and you will never know because the rest of the motor will be trashed.
Could be as simple as a broken oil pump or shaft. If you keep running it with low oil pres and you will never know because the rest of the motor will be trashed.
08-12-2012, 02:33 PM
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Pull the drive, unbolt everything and pull it. How long it takes to do each of those things all depends how fast you are and how long and bad everything is to get to. Just way to many variables to give an estimate.
08-12-2012, 03:30 PM
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Yup, pulling the motor is not for the faint of heart. And you need the proper place and tools.
Pay to have it pulled and diagnosed properly. You don,t want to have to do this twice, or three times.
You have to be able to find the root cause of your problem, before you add a bunch of new parts.
How much money you want to spend ? Boat stands for Brake Out Another Thousand. LOL. How many hours since the engines have been re-built ? Hopefully you don,t have this problem, X 2. If both engines need to be re-built due to hours, it could get very expensive, in a hurry.
Pay to have it pulled and diagnosed properly. You don,t want to have to do this twice, or three times.
You have to be able to find the root cause of your problem, before you add a bunch of new parts.
How much money you want to spend ? Boat stands for Brake Out Another Thousand. LOL. How many hours since the engines have been re-built ? Hopefully you don,t have this problem, X 2. If both engines need to be re-built due to hours, it could get very expensive, in a hurry.
Last edited by 350scarab; 08-12-2012 at 03:46 PM.
08-12-2012, 05:05 PM
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