Running twin F200 Yam's did both water pumps as routine maint. Ran engines in a 55 gal drum all good water pisses out of TT hole on both engines. Splashed the boat drove it over to my marina (approx 15 min low spped) again all good water pissing out strong of pee holes. Get boat all situated...
Saw this old thread thought maybe you can give me some insight. Pair of 2005 Yam F200. Did the water pumps on both engines before splashing them. Ran them both in a barrel all good water pissing out the pee hole all good pumps work as they should. Launched boat ran it over to my marina. Again...
Did you ever find out what the issue is?? I am having a similar issure however when I run the engine it comes out the pee hole. Only when I flush it ir wont come out.
