Recently acquired an older boat with a Mercruiser MCM200 s/n 0A612778 with a Transom Assy s/n 0A673558 and Drive Unit 0A501205. Never had a Mercruiser sterndrive before and just want to know why there are what appears to be exhaust ports on both sides of the gimbal housing? I started the engine and was using "muffs" and 96% of the water was exiting these ports and very little water was coming out of the center hub. Is this all normal?
