oil pressure at idle

[fontenot41]

What should my oil pressure and rpm be at idle??
I have a 2005 mercruiser 4.3l and I'm at 1000 rpm and 50psi on oil pressure at idle.
Does this seem Normal oil pressure at idle

 

[boatman37]

seems high. how high does it get at RPM? a small block chevy (4.3 qualifies) only 'needs' 7 PSI at idle and about 10 PSI per 1000 RPM. there isn't really a 'too much' until you blow an oil filter gasket. you may have a bad gauge or sending unit? was it always this high at idle or did something change?

i used to build race engines and hated high volume pumps as they only cost horsepower. a high pressure pump was ok to use, or i would buy a regular pump and install a washer in the spring.

 

[fontenot41]

I rechecked. It's 40 psi at idle (800 rpm) at 2000 rpm it's about 43psi, 3000 -4000 rpm it goes to about 60 psi

 

[Bondo]

Ayuh,..... Idle should be set to 650/ 750 rpms at idle, in gear, in the water,....

As noted, 10 psi per 1000 rpms is acceptable oil pressure,....

50 psi at idle, on a stone cold motor ain't outa line,.....
Oil pressure drops quite abit when the motor is fully up to operatin' temps,....

 

[fontenot41]

Ok great. That's good to hear. Thank yall