Drowned my 640 yesterday. Was completly submerged for quite a while. Got it home and Dewatered everything. Drained all the oil and fuel and have flushed through a couple of times. Lights and indicators work fine and it seems to be charging Ok All seems ok with the motor, however the speedometer and tacho are dead. Needle on tacho is sitting on about 10k. . Anyone know if these things are service able or of a fix.