[jclark003]

I remember seeing it once on my 43 but now I can't remember where. I think its either behind the access cover in front of the stbd engine, behind the electrical disconnect panel in ER or try pulling the drink holder to the right of helm seat and see if you can see it (or where the vent hose leads) behind the liner. Last place I can think of is up high above the hot water heater. A cheap $25 inspection camera from Amazon may save you a lot of time and frustration.