Re: 5hp sea king
On your engine, the cylinder is air cooled. Only the exhaust is water cooled. That's typical of these small air-cooled outboards. The engine is pretty much a two-stroke lawnmower engine, complete with fan.<br /><br />But...they route the exhaust through the midsection and cool the tube with water. That's strictly to keep the engine quiet. Only the exhaust is water cooled. The engine is not.