I have two 1993 Force 120's on a Trophy Walkaround. The port motor will began to lose power, rpm's steadily dropping until it quits. I checked the fuel connections and re-primed using the priming bulb. It starts great and gets going...up to 4000 rpm's...in a minute the problem repeats itself...I re-prime, she starts, runs and quits. I must have been losing prime...the bulb was flat each time I re-primed. So far I have replaced the fuel lines from the fuel water sep to the fuel pump and to the solenoid...I have new fuel water sep cartridges. There are other fuel lines to replace, and the primer solenoid too....what can you suggest? I think I should go ahead and take apart the fuel pump. I have a manual, but it only has directions for the two-stage pump....this one is square shaped. Thanks.