View Full Version : Too much oil pressure!

05-29-2007, 12:19 AM
I changed oil and filter. Used a Hastings LF 225 oil filter and Rotella 15w-40 oil.

Took it out for test run, idled with 50 lbs of oil pressure and when I increased speed a little it went up to 70 lbs!. Took it in and checked everything and tried it again and it went up high and when I lifted the engine cover there was a little bit of smoke. I brought it in and shut it off.

Why so much oil pressure? Can't you blow seals, scuff cylinder walls, something if your oil pressure is too high? It is a 1994 190 with a 350 and TBI.

Last year I did not have near this oil pressure, but the oil I dumped out was thin and dark. We ski in UP and water temp was 55 and motor temp was around 130.

My first year with the boat and my first tune-up on my own. I do not believe the dealer last year did anything to it.

The boat is cherry and I do not want to screw it up.

05-29-2007, 07:39 AM
My '95 350 TBI runs around 70 lbs when it is cold. It will warm up and drop a little. It is better to have higher pressure than low pressure which is a sign of worn crank shaft bearings. The thicker/new oil will also run the pressure a little higher.

05-29-2007, 08:09 AM
Thye gauge on my boat typically registers 80 above 4000 RPM and about 40 at idle.

05-31-2007, 08:47 AM
It's been my experience that most guages aren't totally accurate. 50-70 psi does not sound out of line though.
Smoke? From what?