low oil pressure
 

First off let me say hello to everyone. I am a new owner of a 1992 mx19. Love the boat. Took it out for the third time today. Noticed the oil pressure gauge bouncing all over the place, then dropped to zero. I shut it down. Oil level ws fine, engine ran and sounded good. Went ahead and tubed for two hours with no issues. Wanted to get you thoughts as to causes. I am thinking a bad gauge. Engine is 4.3lx. Looking forward to many years to come with this boat. I will post pics after I get her cleaned up a little more. Oh, first time boat owner. Thanks!

Re: low oil pressure
 

Welcome aboard! Its not likely a bad gauge but more likely a poor ground connection. Check & clean the wiring connections at the gauge, the ground connections at the fuse box (up under the dash against the side wall) and the connections at the oil sender unit.

Re: low oil pressure
 

Welcome to MOC dusty! :)

Re: low oil pressure
 

Thanks for the quick reply. I will do that this week and post ow it goes when I take her out Saturday. I have other questions, but will spread them out so I don't bombard ya'll, :)

Re: low oil pressure
 

We ain't scared.........fire away!:yes_grin:
The guys are always ready to help out.

Re: low oil pressure
 

If cleaning the grounds @ the gage does not work for you then check the connection @ the oil pressure sender on the motor. If you see oil on/around the sender then it may need to be replaced. The internal diaphram will sometimes leak, oil gets on the resistive sensor and will cause the exact symptom you described.

Re: low oil pressure
 

Where is the sender located?

Re: low oil pressure
 

I believe it's located on the starboard side of the motor right below the last spark plug.

Re: low oil pressure
 

Mine is port side just above the oil filter.
One for gauge , one for low oil shutoff.

Re: low oil pressure
 

You're likely accurate with that. I 'think' it was moved in later incarnations of the 4.3 and i'm trying to work from memory which at my age, gets a little faulty at times. :yes_grin: