Had the motor for about a month and then one day out on the water it stopped running and so I paddled back to my house where I found that the oil was milky (water in the oil). I changed the oil a few times to flush out any bad oil and then went to launch it again. The motor ran but wouldn't switch into gears without dying no matter the idle. Took the engine apart to find that the head gasket was blown. I replaced the head gasket and the thermostat which was also old. Also replaced any gaskets I took off getting to the head gasket. Now the engine wont run... any ideas?