Sierra 18-5815 Starter Solenoid for Mercruiser, MercurySierra Solenoids are designed to meet OEM specifications. Used for starter and power trim systems. Fits Outboard 2 Cyl. & In-Line 6 & MCM applications.Interchangeable with: Arco; SW275; GLM; 72370; Mallory; 9-15111; Mercruiser Stern Drive; 89-76545T; 89-61053; 89-68258; 89-68258A4; Mercury Marine; 89-76545; 89-15857; 89-853654A1; 89-61053; 89-68258; 89-68258A4;