Hi, my outboard starts and idles fine, but when I throttle up it runs good for only 15 - 20 seconds, then starts to stall out - unless I drop it back to idle quickly. If I wait maybe 30 seconds or so it will throttle up once again but then starts to stall out after 15 - 20 seconds. I had my son squeeze the fuel bulb when I got to WOT but it didn't help. Could this still be a fuel pump problem even though squeezing fuel bulb makes no difference? Thanks.