MerCruiser Inboard/Outdrive Model Identification Guide
Locating MerCruiser Serial Number Tags
Engine Serial Number: The serial number tag is located near the starter, by the flywheel housing; or, on the rocker arm or flame arrestor cover.
Transom Plates: The serial number tag is located on the inner transon plate inside the boat; or, on the upper swivel pin.
Sterndrive Serial Number (separate from engine): The serial number tag is located on the upper drive shaft housing (starboard side or on the back of the housing).
MerCruiser Model Number Guide