Sierra Thermostat Kit Mercruiser S18-3644 water hose With proper alignment and lubrication

With proper alignment and lubrication the XPC Seal System has proven successful in Hydroplane race boats running shaft speeds in excess of 6000 RPM for over two seasons

Safety back-up operating mode prevents continuous running if the sensor or impeller is fouled by debris

Say goodbye to the old 378444 and Prestolite SAW4206 - this replacement is a game-changer

0mm Mount Type M6 Unit Qty 1

Sierra Thermostat Kit Mercruiser S18-3644 water hose With proper alignment and lubricationContains BLA Code Description O. E # S18 3649 Thermostat 160 807252T2 S18 2553 Thermostat Cover Gasket 27 47510 S18 2917 Thermostat Cover Gasket 27 53045 1