Re: Spin-on gas filter?
The issue with adding a fuel water separator is the extra draw the fuel pump must do to suck fuel. Your engine was not made originally to handle this type of filter. Probably not a bad idea to add one, but you need to be careful. If you currently have an in-line filter (yours does under the cowling-you need to remove it. The vacuum gauge is a neat idea-you can run that engine lean at high rpm's if your new filter draws too much vacuum. Many of these filters indicate what hp they will handle. Mercury makes a water separator filter kit, complete with the filter, the aluminum head and hose barbs-which will mount to the inside of the boat. Make sure you use large hoses and don't kink them, or the vacuum can quickly increase above what the pump can handle at high rpm's. The later V6 OMC/Bombardier engines come with a vacuum switch which will signal a warning horn if the vacuum gets above 7 hg-that's when the V6 engine can run dangerously lean.
