My Sanger V210 has 520 hours on its Black Scorpion Mercruiser. This weekend I noticed a problem with the oil pressure. At riding speed (20-23 mph / 2800-2950 RPM), the oil pressure is low, and bounces around a lot. It varies from normal...down to the low/warning level in a random manner.
The oil level is fine. When I first noticed, I checked the oil...it was at the low end of the OK range. It took less than 1/2 Qt to top it off...so that was not it. The oil looks clean (about 75 hours on this oil...so I will change soon.) The engine is running at normal temperature, and other wise seems fine.
When I speed the boat up to 25-30 mph (3100-3250 RPM), the oil pressure is rock solid normal.
If it were the gauge, it would be jacked up all the time. Any ideas what this could be...?
Thanks in advance,