1980 53’ Hatteras MY. Oil Drive Pressure

[PJT]

1980 53’ Hatteras MY. Oil Drive Pressure

My helms read 200 psi.
New mechanical gauges read 150 psi (correct reading)
Any ideas for the discrepancy or solution?
i understand the pump can be adjusted, however, this is an indicator error?!

 

[SEVEN]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

It’s the oil pressure sending unit on the motor that is bad. Mine did the same exact thing. It read 120 on the starboard engine and 220 on the port engine. I installed mechanical gauges on the transmission and they both run at 120. I was able to buy a used unit from Sky on this site and replaced it and now all gauges work perfectly. You might reach out to Sky because he did have another one he wanted to sell.

 

[SEVEN]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

When I blew up your dash I saw exactly what mine look like when I bought it. I could barely read what the gauges were for. I took some kaboom and a toothbrush, and just scrubbed all of those engraved letters, and they came out looking brand new. It’s just 40 some odd years of dust buildup.

 

[PJT]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

Thank you!

My understanding the correct pressure is 150 PSI?

Anyone?

 

[SEVEN]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

My mechanic who has been working on diesels for over 40 years tells me it’s 120. And when I put in the new pressure sending unit it went right to 120. Which then matched the starboard engine.

 

[PJT]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

What motor oil is everyone running in the M20?
Delo 100 straight 40wt same as the engine?

 

[Captain Ralph]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

What motor oil is everyone running in the M20?
Delo 100 straight 40wt same as the engine?

Yes.
Delo 100 is usable. The same as the engine.
Chevron (Delo 100 40w), Shell (T1 40w), NAPA( 75-118), others; CF-2, 40w oil.

 

[PJT]

Re: 1980 53’ Hatteras MY. Oil Drive Pressure

Excellent!

Thank you!