I run a 1989 Johnson 150 and a 1983 Honda 10 hp kicker on my 21' Seaswirl Striper. I have installed a fuel filter/water separater and have the fuel lines from both engines coming off this single filter. Is this a problem? Somebody told me I should have a switch to select which engine should get the fuel. Since both engines never run at the same time, I see no reason for the switch. Anybody have any experience with this?<br />Thanks<br />Kingfisher