Pretty nice back here. The brass valve near side has a handle so you can fine-tune the amount of cooling lake water you run through the engine. There is a Dan Olson oil cooler/oil filter mount beside the oil pan on the other side of the engine, that gets the cooling water first. This pre-warms the lake water a bit and cools the oil. The curved A-N line on the floor is an easy oil change hose . Just run the end of the hose through a removable plug in the transom, and pull the plug.