Megaware SkegGuard 27021 Stainless Steel Replacement Skeg. Model Guide. Mercruiser - Alpha I 1985-1990. Inexpensive Solution to a Broken Skeg - Save Hundreds of Dollars on Skeg Repairs & Replacement. Megaware SkegGuard provides the best of two worlds. It will protect and prevent damage to your motor's skeg and can also be used to repair and replace an already broken skeg.. Protect Your Skeg with the Best Protector. The Megaware SkegGuard is constructed of high quality marine grade 316 stainless