Patent ID: 6857405

Claim:
An internal combustion engine for a marine drive comprising an engine body, a movable member movable relative to the engine body, the engine body and the movable member together defining a combustion chamber, the engine body defining intake and exhaust ports communicating with the combustion chamber, an air induction system communicating with the combustion chamber through the intake port, an exhaust system communicating with the combustion chamber through the exhaust port, an intake valve arranged to move between an open position and a closed position, an exhaust valve arranged to move between an open position and a closed position, a camshaft configured to actuate either the intake valve or the exhaust valve, the camshaft extending generally vertically, a change mechanism configured to change an angular position of the camshaft, a sensor configured to detect the angular position and to generate a signal indicative of the angular position, the sensor being disposed below the change mechanism, a member configured to engage the engine body so as to enclose the camshaft, the sensor being mounted on the member, and an entirety of the sensor being disposed generally closer to the engine body than a distal end of the member, which is farthest from the engine body.