Abstract: In a marine drive having a wiring harness (14) connected between the engine (2) and the helm (8), an alarm sensing module (26) is connected to the harness (14) and provides a warning of one or more abnormal engine conditions, without altering the existing wiring harness or adding wires thereto. A temperature switch (30) and an oil pressure switch (32) are provided at the engine, and the sensing module (26) is connected to the engine temperature gauge (10) and engine oil pressure gauge (12) at the helm. The module activates an alarm (28) in response to high engine temperature or low engine oil pressure.

Abstract: A spark plug terminal connector for providing an electrical connection of a lead to a spark plug terminal includes a U-shaped seat for receiving the spark plug terminal and a conductor formed integrally therewith for providing an electrical connection of the lead to the seat. A U-shaped spring grip is adapted to fit around the closed end of the U-shaped seat, and has a pair of resilient opposed engaging fingers for retaining the spark plug terminal within the seat. The engaging fingers urge the spark plug terminal against the seat for providing an electrical connection thereto. The connector may be disengaged from the spark plug terminal with a pull-off motion in a direction other than in line with the longitudinal axis of the spark plug terminal without incurring damage to the connector.

Abstract: A safety stop switch assembly (10) for controlling a device such as an outboard motor includes a toggle switch having a switch arm (12). A clip (16) is held in place around the switch arm (12) by a spring arm (21). The clip (16) can be attached to the operator by a lanyard (17). When the operator is sufficiently removed from the device, the lanyard (17) will pull the clip (16) away from the switch arm (12) and turn the switch off. The switch arm (12) can be used to control the outboard motor with or without the use of the clip (16).

Abstract: A marine propulsion apparatus includes an external combustion engine having a fuel pump connected by an electrically operated anti-syphon valve unit to a storage tank. The electrically operated anti-syphon valve unit includes a resiliently loaded valve means which is moved to open the valve unit either by an electrical operating means or by the normal pressure differential created by operation of the engine fuel pump.