I'm asking this question for a friend of mine who doesn't know how to post! I think its an age thing!!:smile2: He has a 1993 Mercury 50hp. It will run at full throttle for a few minutes and then it bogs down to just over idle speed. He thought it was crud in the gas tank (built in), so he put a filter on it. It was picking up some crud but it was still doing the same thing. Based on something that I read here, I suggested changing the fuel line and bulb. He did that, in addition to a brand new portable tank. It still does the same thing. We discovered that when it bogs down, we can pump the bulb and it picks back up for a few minutes. It sounds to me like it might be a fuel pump problem. What are ya'lls thoughts and what can we do for troubleshooting? Thanks.