314728 OMC O-RING

The OMC Johnson Evinrude 314728 is an OEM drive shaft O-ring that seals the drive shaft on Johnson and Evinrude outboard motors from 40 to 300 horsepower. This seal prevents oil leakage from the lower gearcase assembly. The O-ring is equivalent to Sierra part 18-7130 and has cross-references including GLM 81380 and Mallory 9-76528. Dimensions are 2.125 inches inner diameter with 0.100-inch width. The 314728 is readily available as single units or in multi-packs from specialty retailers and eBay vendors, essential for lower unit maintenance on vintage outboards.