Pump Raw Water Bronze LT-1/LTR | Indmar 685020-4 Bronze Raw Water Pump LT-1/LTR | Indmar 685020-4 OEM crankshaft mounted engine cooling pump used on 5.7L Indmar LTR & LT1 model marine engines. Bronze Raw Water Pump LT-1/LTR | Indmar 685020-4 Indmar raw water intake pump Fits Indmar and Mastercraft LTR and LT1 engines with crankshaft mounted raw water pumps 1 1/4 in. inlet and outlet ports Bronze pump housing 5/8 in. splined shaft Uses Johnson Pump 09-812B-1 replacement impeller Replaces Indmar 685020, 685020-1, 685020-3 Original Indmar