Trojan Boat Forum

I have a 1978 F30 with twin 318 Chryslers. Both my lower and upper station oil pressure gauges are close to pegging close to 90 psi. This happened after coming out of heated winter storage. Since all 4 gauges are pegging high I doubt it is an actual pressure issue in the engines. They sound fine and boat ran well. I can't believe all 4 gauges are bad or both sending units. Can anyone give me advise on what the issue could be or where to trouble shoot. Can one bad gauge or sender affect both engine readings?

Check your grounds to the panels.
Is this at idle and warm?

Yes, at idle and warm

Assuming nothing was changed it sounds like a ground issue. But it is odd it's the upper and lower. If it was only one engine I would think about a sender issue. Still posable, any work done over the winter?

No, but marina disconnects batteries during storage. They may have bumped or accidently kicked something in the bilge. This one has me stuck for answers.

Check around the battery area too.