A pre 09 Tige would have had a common manifold for 4 pump with the main intake on the transom. Notorious for air lock issues. Typically had to reverse the boat and goose the throttle to get them primed for the first time each time the boat was launched. 09 and later, each pump had its own thru-hull and they are hull mounted between the v-drive and fuel tank. Still see some with some air lock issues due to how the factory oriented the pump's outlet or the style of check valve used. Many times we've reoriented the pump or used a different check valve.
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