my boat has set for severalmonths.... fianally got it started after draining the fuel out of both carbs...put in fresh fuel..starts right up but when i put in gear it does not have any power to speaak of at all..wont even get to 3000 rpms.i have noticed that the pprimer ball seems to be soft while its running... dont know if that has anything to do with it or not...any ideas?