The only way I can see to shear a key is to suck something up while going full speed through shallow water. We did just once. Late summer and the water was real low. Went through a rift at the end of an island, had to make a real sharp turn in order to enter it. When we got to the end I looked ahead and there saw nothing but a solid mass of long weeds. There was no turning back, the rift was to shallow to float back down through. CLOG! What a mess. You said you installed boyesen reeds? Did you notice much of a difference? Did they change the RPM range of the engine? I don't understand that while liquid cooled 2 strokes in snowmobiles and such will turn 8-10,000 RPM's while outboards are limited to 5-6,000. If you could get into that higher RPM range you would have a lot more top end for covering water. Heck, my air cooled Polaris sled doesn't move until you hit 5 grand and that is a 1973! I don't see why it isn't possible with outboards. My whole point to this is that if you could turn more RPM's for more top end you could get away with a smaller, lighter motor which would in turn allow you to access shallower water. Jets are an awesome tool to increase your fishing opportunities. I'm just curious to hear some other views and experience. Also something to talk about since there is not alot of posting going on yet .