Big gus wrote:
Help!!!

Hi all

anyone had this problem?

I have a twin engine searay
with 454's


I just hand the heads , valve's, new rocker arms, and valve springs
done in the one engine

I ran the boat at the dock for a good 8 house with no issues. I even
changed the oil several times just to be sure


I took the boat out last night and after running under load for about
15 minutes the engine in question started to lose oil pressure.

At once I shut the motor down.

I got back to the dock expecting to see oil sprayed all over my engine
compartment, but I found nothing, no leaks drips or any sigh of oil
leakage

Checked the dip stick and it was fill and very clean.

well I got back to my slip and took a look at the oil filer , it
seemed to have some stuff in it as I assumed that it would, so I
changed it, and re started the motor.

As the filter filled the oil pressure gauge jumped up, but not as high
as it should.


Anyone got any thoughts ?

on why all of a sudden I got no oil pressure?

Thanks
M

You said the oil pressure went down to zero. Sounds kind of strange.
A friend in the marine business once told me that a problem like this
(one that occurs after the engine was worked on) is always related some
how to the last repair. I would guess they might have bumped the oil
pressure sending unit or its wire. Give the wire a look and see if its
a tight fit. Before I did anything major at this point, if the
sending unit and wire looks OK, I would replace the sending unit and/or
remove the sending unit and temporarily attach a mechanical guage to
the engine and get a real pressure reading. The reasoning behind this
if the face you said the enging sounded fine even after the pressure
went down to zero.

Regards, Bob