Description: 【Voltage】: This Boat Motor Starter Solenoid Relay Assy operates at a voltage of 12V, ensuring performance for Mercury Mariner outboard engine 【Wiring Instructions】: The pointed end (brown) connects to the positive pole or start button, while the round end (black) connects to the negative pole or ground. This ensures easy installation and proper functioning of the relay 【Purpose】: The primary function of this starter relay is to control the circuit of the starting motor in your outboard engine, providing reliable and consistent operation 【Compatibility】: Specifically designed for Mercury Mariner outboard engines with horsepower ratings of 8HP, 9.9HP, 25HP, and 30HP. It's a good fit for these models and enhances their performance 【Part Number】: 853809001, 881352T, 8M0098898 Specification: Material: Plastic, Copper Size: 4.8cm/1.89inch Package Includes: 1 Boat Motor Starter Solenoid Relay Assy  Note: Please allow slightly errors 1-2cm differences due to manual measurement.