I started getting symtoms the other day when i started to open up the throttle the motor would bog down alittle the when i pulled back up it would be ok . Then yesturday i went to start her up and it's runs for about a minute when giving it throtle but then she dies out i changed the primer bulb and the fuel filter and still the same issue i think that it might be my fuel pump if so is this hard too change or not ? I have a 115 Johnson O/B ?? Please Help Thanks !