missnancy
Regular Contributor
Ok guys, I have an odd one for you. My boat has a chevy 270 (350 cu/in engine). I have a electric oil pressure gauge on it and when I start up cold it tells me I have 75 to 80 pounds of pressure. When I would get up to 2200 rpms it is around 75 pounds, get up to 3200 rpm and it starts to bounce all over the place. I then decided to put an mechanical gauge on as well. Start up and the electric gauge gave the same readings but the mechanical gauge would read 55 pounds. I would head out and run up to 2200 rpm and the mechanical gauge would read 25 lbs and the electric 75 lbs. increase the rpms to 3200 and the electric one stayed the same and the mechanical one would drop to around 10 lbs. There is no knocking or any noise when I get up in rpms.
I am running 10/30 oil. The motor only has 58 hours on it. Any thoughts? One fellow suggested that the pressure relief valve where the oil filter screws on may be bad, The oil pan is a 5 qt model. I am at a loss and await every ones sage advice.
Paul
I am running 10/30 oil. The motor only has 58 hours on it. Any thoughts? One fellow suggested that the pressure relief valve where the oil filter screws on may be bad, The oil pan is a 5 qt model. I am at a loss and await every ones sage advice.
Paul