Quote:
Originally Posted by daxt79
Someone correct me if I'm wrong, but the hose runs up to the engine cowl & is connected to the engine/electronics. The tube faces forward in the lower unit & measures water pressure in the tube to calculate boat speed.
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Water pressure comes from the water pump and the pressure reading comes off the block. Speedo comes of the pressure from the water that is pushed into the gear case through the little hole in the front of it or the pickup that you mount to the outside on the transom