How To Replace A Tohatsu-Nissan Outboard motor Water Pump,Impeller. Tohatsu Outboards: Water. Replies. Thread Title. Forum Title. Tohatsu 90 TLDI - water pickup. Tohatsu 6 Fresh Water Rinse Problem. Tohatsu 18hp not pumping water when in gear. Tohatsu 18hp - engine 'racing' at high revs but not converting to speed on water 2. Tohatsu MFS6B Cooling Water Leak. Tohatsu M40C no water out of tell tale. Anyone have any luck or expereince with low water pickup for tohatsu 90 TLDI. Tohatsu M40D water pressure against exhaust.