I've got a 91 Force 15hp that essentially runs like a charm. Yesterday, after a several month layover, I got her running again. She idles fine, and runs at full just fine, but frequently when throttling up from idle to full, there is a nasty hesitation in between, and she stalls often unless I torque the throttle quickly. This is something new, and I'd like to know if there is any particular most likely reason for this to be. Any thoughts would be appreciated.