I just bought a Johnons 9.9 1981 short shaft engine. it startss leaking water out the exaust(when I say exhaust I mean the hole halfwaydown the shaft, not from the prop or the peehole) after about 1 minute after starting I gave it a compresion test and both cyl. tested over 75 which i assume is good. I restarted it and it ran for another minute and then started shooting water out the exhaust again and eventually died even at full throttle. I know that some people posted that water should be coming out the exhaust but Im not sure if you were talking about from the prop or not? my freind has almost the same engine but a 15 hp instead and water does not come from the exhaust on his and it runs great, and what about the idle Could this be the water pump is not pumping causing flow into the carborater or the fuel pump. or possibly the actual line from the fuel tank to the engine. It says in the opperating manual that if the actual cylinders were leaking that the plugs would appear clean due to water flowing through. should I take this motor back or is this a simple fix. If water is suppose to come from that other little hole then perhaps my mixture flow is not good?