Boats been running great & when starting out it goes into forward gear fine the first couple of times it is tried but after warming up the boat dies when trying to put into gear or shortly after being put into gear . After several attempts it will finally go only after playing with the rpms which I know is very hard on it. Recently replaced the lower shifter cable & I know it is out of adjustment but could it be the shift interrupter? I was thinking the Si was for coming out of gear ...or simply the cable needing adjustment?