Product Description
If you find water in your sterndrive oil, this can be due to impeller shaft seal leaking, allowing water into the sterndrive case. This particular occurrence is very common. It can be easily checked by removing the impeller and exposing the round plate on the dry dock. Start the engine for a minute or two and see if the seal around your impeller shaft becomes oily. As water pressure surrounds this area, water gets squeezed into the case. Changing the round plate with a new seal doesn't always work because your shaft may have developed a groove around the original seal position, causing it to no longer have a tight connection. The solution is to move the seal to a new position away from the groove. This variation is available from a Canadian dealer and priced at several hundred dollars. They take the original part and CNC a new seal position. We offer an inexpensive solution to this problem by keeping your original part in place. We designed a 3.16 mm gasket with a built-in spring-loaded oil seal. This seal replaces the paper seal that usually comes with an impeller kit.
How to Prepare
You need to sand your corroded plate and apply two-part, paste-type JB Weld to patch up surface imperfections. When the JB Weld dries, sand it down to a reasonably smooth surface and apply any kind of aluminum primer. Install our seal with the seal lip outwards using any "Aviation Gasket Sealer." It usually comes with an internal brush and is typically priced under $10. It will last for many marine or automotive projects.
