Electricity travels from the battery to the starter motor through a starter solenoid on all boats with electric start engines. If nothing happens when you turn the ignition key to the start position, you may have a solenoid problem. A solenoid is responsible for delivering battery voltage to the starting motor. When the electronic contact inside the starter solenoid activates, a circuit is formed that allows electrical current to flow from the battery to the starter, which turns the engine over. Come to ProPride Marine whenever you need a replacement item or an improvement for your boat. We provide everything a boater needs and are well-known for our assortment, low rates, and excellent customer service. Key Features: Specifically for Mercury and Force applications. Designed to resist the rigors of the sea. One solenoid is included. Replaces part numbers: Mercury 89-818997A1 Mercury 89-818997A2 Mercury 89-818997T1 Mercury 89-818998A1 Mercury 89-818998A2 Mercury 89-850187A1 Mercury 89-850187T1 Sierra 18-5819 Specifications: SKU: SW394 UPC: 693006001777 Weight: 1.00 LBS Grounded base. 12 volt. Fits: Mercury. Replaces: Mercury 89-76416A2