My wife and I were out cruising this afternoon when we got back to the boat hoist I put the boat in neutral to slow down but the boat stays in forward gear. Even if I pull the shifter back to reverse and accelerate we continue going forward. With the shifter straight up I push in the throttle only button and move the shifter forward it still stays in forward gear and accelerates.It is a Quicksiver shifter. The boat is a 1988 Crestliner with a 3.0 litre and Alpha One sterndrive. What should I look for first. The boat is still in the water on the hoist. I have torn into it in the past getting the head rebuilt about 6 years ago and I have pulled the lower unit myself several times to grease the U joints, altough now the lower unit has not been off for a couple years.