Re: 1997 150 EFI delete oil pump?
The Mercury oiling system is a pretty good system if maintained properly. The killer for the oil gear internally is a overheat and not fogging engine for storage. What happens is the "plastic" gear gets soft in a overheat and gear edge warps causing eventually failure of gear, the other is not fogging engine, when laying up in a humid area that light layer of rusts forms on shaft and when put back in service that wears gear and over time it fails. My suggestion,make sure alarm horn and sensors are working and just run it till ya havea problem...