I recently had my impeller changed out on the water pump on my 1994 Force 70 motor. Don't know if this has any relationship to this problem, but since then I can't get the motor to shift out of forward gear. It wont go into neutral or reverse. I know it would go into reverse and neutral before. Are these problems related? In any case, what should I check? Linkage? Lower unit? Should I take it back to the place that did the impeller replacement and have them take a look?