Home › Forum › Ask A Member › 76 Evin 15 LS lower unit water drains › Re: 76 Evin 15 LS lower unit water drains
The little hole in the extension housing is only for the driveshaft tube. The water that dribbled out of the exhaust reliefs is trapped in the "wall of water" that surrounds the inner exhaust tube in the exhaust housing. Water trapped here will not get into the lower seal area of the powerhead. But, there are exhaust relief holes that connect to the "wall of water", so water trapped here could work its way into a cylinder through open exhaust ports if the engine is set down after removing it from the boat. Not real likely, but possible, so I would avoid setting the engine down immediately after removing it from the boat or tank.
You will probably have to remove that gearcase to clean out that pesky water drain on the gearcase, go ahead and enlarge the drain hole slightly as well. Replace that aluminum impeller housing (use the complete water pump kit) when you do the water pump job as well. Be sure to replace the driveshaft oring, and lube the splines with OMC moly lube as well.