I have a 40 hp Mariner Magnum 4cyl engine on my boat. The low oil sensor warning beeper started going off with the key switched on. This happened years earlier and I disconnected the bullet connector and the horn stopped beeping. The problem that I am having is the engine was bogging when I was running at or near wot. it ran fine at mid range speeds. This last weekend I replaced my primer bulb, secured all the fuel line connectors, replaced the fuel filter and the problem increased. when running back to the dock I had to pump the primer bulb to keep the engine running. it shut down once and I pumped the bulb, it never got really hard and the engine flooded. finally got it started again and eased back to the dock. I am thinking that the problem might be the fuel pump. does anyone think I am on the right track? any help will be greatly appreciated.
