I have a 2001 70hp 4 stroke Suzuki with 800+ hours. Problem is: From neutral to forward, or reverse, rpm decrease from 650 + or - to 450 or so & when you apply more throttle, it stalls. Does not do it everytime but enough times to make it a bother. Local dealer has had it on computer, injectors et all check out fine. We have replaced spark plugs, both fuel filters, primer ball, checked the tank vent, ran double dose of injector cleaner & a tank of high test. Everything checks out fine but the problem does exist. Any suggestions?? Thanks in advance.