Home Engine Systems Engine Parts Solenoids Mercury 50 XR-4 Magnum III Solenoid – White Housing (18-5818) Sierra International Mercury 50 XR-4 Magnum III Solenoid – White Housing (18-5818) $53.99 1 in stock Mercury 50 XR-4 Magnum III Solenoid – White Housing (18-5818) quantity Add to cart Product Details Product Details Fits: 150 XR-4 Magnum III with off white color solenoid. Replaces: Mercury 89-818864, 89-818864T.
