"oelf92" wrote in message
...
I have a 94' Chaparral w/ a Mercruiser V8 I/O.. I have noticed recently
that after driving the boat a while (tubing, skiing, cruising) and then i
put the boat in idle the oil pressure is around 20, but then when i start
up and run it again it's back up to 40. Now I know the oil thins when it
heats to cause the lower pressure, but is 20 too low? and is 40 good while
running hard? Oil level and check is ok, and i beleive i have straigh 40
weight in it.

Any info is appreciated!!!



Sounds perfect to me.
A general rule of thumb for an engine with a few hundred hours on it is a
minimum of 10 psi per 1000 RPM of engine speed. 20 psi when hot and at idle
is very good.

Eisboch