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tighten the hardware in the sequence and to the value specified in your engine's service manual
it's best to inspect the air filter every 100-200 hours of operation and replace it at least annually or more frequently if operating in particularly dusty or salt-laden environments
Apply tension to the belt by tightening the alternator or tensioner
and the battery is disconnected
Thoroughly clean both the manifold and elbow mating surfaces
Water Pump Impeller Kit – Fits Mercury R/MR/Alpha One (Replaces 42724A3) 155HP tighten the hardware in theProduct Details This Water Pump Impeller Kit is designed for Mercury Marine R, MR, and Alpha One Generation I sterndrives manufactured between 1984 and 1990 (serial numbers 6854393 to OD469858). It provides the essential components for servicing the lower unit's water pump. It serves as a direct interchange for several original and aftermarket part numbers, including Mercury 42724A3, Mercury 46 37433A1, Sierra 18 3219, and GLM 12200. Engineered as a
