Any and all help would be greatly appreciated! Have a 1998 Bayliner Capri LS 1850 with the 4.3L Mecruiser. Boat starts fine but runs rough. Rebuilt carb then replaced plugs, plugwires, rotor button and distributor cap. Checked fuel from tank, its clean. Did a compression test, 5 of 6 cylinders 140ish one cylinder is 170ish, it is also the cylinder not operating properly. The reason I know this is because I can pull plugwires one at a time and this plugwire makes no difference in idle of engine. Ran boat anyway, ran good for 5 of 6 cylinders. Seemed to loose more power the longer I ran. Started a slight backfire/ slight pop from carb. Pulled plug from said cylinder and it was very nasty with what looked like oil with water in it. Pulled oil stick and it looks like oil was just poured out of can, brand new. Ran again on muffs in driveway no sign of oil in water from discharge, even after drying on concrete no signs of anything. Also no sign of moisture on oil filler cap. Again any and all advise where to look now or what to check next would be greatly appreciated.
I'm leaning toward pulling valve cover to see if there might be an exhaust valve issue. Wondering if this could be a head gasket issue or maybe I'm getting water in this one cylinder from the exhaust manifold?
Thanks, David
I'm leaning toward pulling valve cover to see if there might be an exhaust valve issue. Wondering if this could be a head gasket issue or maybe I'm getting water in this one cylinder from the exhaust manifold?
Thanks, David
