"I have a 1988 3.7 I/O Mercrui
"I have a 1988 3.7 I/O Mercruiser. I just had the engine tuned and all fluids and filters changed. Ran the boat a few times (ran great). The other day I noticed the top end getting noisy. A good deal of knocking from the valve cover. I also noticed at very low RPM's my Oil pressure was between 5-10 PSI. When I throttled up, the oil pressure started to riser to approximately 40 PSI (Which is Mid-Range on the Gauge). When I push it to higher RPM's, the pressure starts to enter the 60-80 PSI Range. It doesn't seem to matter what the PSI is, there is still a lot of noise coming from the valve cover. (Rocker Arms) are ticking. Any ideas as to what could be causing this problem?
Thanks Rick."
"I have a 1988 3.7 I/O Mercruiser. I just had the engine tuned and all fluids and filters changed. Ran the boat a few times (ran great). The other day I noticed the top end getting noisy. A good deal of knocking from the valve cover. I also noticed at very low RPM's my Oil pressure was between 5-10 PSI. When I throttled up, the oil pressure started to riser to approximately 40 PSI (Which is Mid-Range on the Gauge). When I push it to higher RPM's, the pressure starts to enter the 60-80 PSI Range. It doesn't seem to matter what the PSI is, there is still a lot of noise coming from the valve cover. (Rocker Arms) are ticking. Any ideas as to what could be causing this problem?
Thanks Rick."