It is typical for an engine exhaust to smoke until it has fully warmed up. However, if the exhaust is still smoking after the engine has heated needs to be inspected and replaced part if necessary. The white exhaust smoke means there is water or air in the faulty seals, and a possible leaking gasket is the main reason. The GASKET EXH COVER OMC 18-0120 made by Sierra Marine is an exhaust plate gasket for Johnson Evinrude Outboard Motors. These gaskets are machined with precision for trouble-free installation safety and functionality. The Sierra Marine engine parts built to meet the requirements and surpass the performance of the OEM part will be replaced and backed up with Sierra's guaranteed warranties. Key Features For: Johnson/Evinrude 18-60hp outboard engines OEM: OMC 325211 Replaces: Johnson/Evinrude Outboard 325211 47-0120, GLM35200, 30999750983, 3099975098, 92-35200 Specifications BRAND: SEASTAR SOLUTIONS SKU:18-0120 UPC:030999750983 Weight:0.11 LBS Dimension: 13" H x 8" W x 1.13" L For: Johnson/Evinrude 18-60hp outboard engines