This item is eligible for free shipping on orders over $99.99
The CDI Electronics Filler Vent Check Valve is designed to aid in the process of a lower unit oil change. The calibrated check valve creates air-lock to keep lube from running out while you install the drain plug. Includes a 4ft hose that allows the oil overflow to drain into the oil pan and not all over the lower unit.
Fits all U.S. made motors such as Mercury/Mercruiser/Mariner and Johnson/Evinrude. A metric adapter can also be purchased for metric applications on all motors except Suzuki.