Oil tank on engine

[Jwnwelding]

Ok I have read everything I can on this issue. I have a new tank in the bilge, new hoses from crank side to pick up tube. New hose from pick up tube to tank on the side of the motor. New inline filter new checkvalve on oil side. I have 3 psi of pressure on my gauge to check when idling. Put I can not enough oil to fill my tank on the motor. It keeps going low setting off the low oil alarm. Does anyone know how muck pressure I should be getting. Is 3psi right. Or do I have something wrong on crankcase side of the tank.

[Squire]

need to check the main oil tank and see if you have jelled oil. My oil tank on the engine would not refill at all and turned
out to be jelled oil. Mercury had a recent recall and even a new part number for optimax oil, with last 3 digits K08.

[Jwnwelding]

Ok. I have checked all the lines and the pick up tube. Not jelled this time. Was last year so I had to replace the whole system according to my mechanic. Was working great. Now it won't fill engine tank again. Trying to test check valve on the crankcase side. But can not find any info on how much pressure it should be.

[1ranger487vs]

Did you purge the tank on engine to get air out

[Jwnwelding]

Yes I tried that also.

[Savage]

Read thread #19 in this link >>>>>>How to BLEED the ENGINE MOUNTED OIL TANK when AIR IS PRESENT

[EuropeanAM]

If you would, please take a moment to review the Announcements at the top of the Forum, and be sure to provide the Required Info (serial number) when posting. Thanks!

What oil ARE you running? Don't assume there is no congealing just because it doesn't look like a ball of "flubber" stuck to the pickup... I've seen a number where the film was so thin you didn't even realize it was plugging the screen. Remove/wash the pickup screen with a suitable solvent, and blow it out with compressed air. Blow out the oil supply line.

Probably need to replace the oil filter just inside the cowling also.

[Jwnwelding]

Thank you. I have blown it out but didn't use solvent. They replaced the whole system last spring and ran fine all year. I hooked a gauge to crankcase side of the system. It goes up to 3 psi when idling but when I put it in gear and rev it up the gauge dropped back down to zero. It should hold the pressure even after I shut the motor off correct.

[Savage]

#19

06-13-2010, 09:36 AM
Re: How to BLEED the ENGINE MOUNTED OIL TANK when AIR IS PRESENT (SeanR)

Before you go that route.... let's reconnect everything PROPERLY "except for the pressure line where it connects to the block pressure check valve".

Locate a pressure tester (such as a bicycle pump), and install it into the pressure hose (clamp with a tie-wrap).

Pressurize the system to 6-9 psi with the pressure tester. Now open the cap on the engine mounted tank, and see if it bleeds the air out (no need to run the engine in this case).

IF IT DOES..... you likely have a bad pressure check valve, or perhaps a bad reed, or a compression problem.