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  1. M

    Location of freshwater exit for Mercruiser Alpha 1 Gen when on muffs

    Just replaced my impeller and on a test run on muffs water was coming out of the propeller area and not in the exhaust where I thought it normally did. When I put the stern drive up about 45 degrees the water exits with the exhaust where I'm used to seeing it. Is there an issue here? Appreciate...
  2. M

    1986 Mercruiser 470 groaning/howling noise

    Mercruiser 470 (1986) almost always makes a groaning/howling sound that seems to be coming from front of the engine. Normally goes away after the engine is warm... any ideas? Has done this for the five+ years I've owned the boat. Thanks!
  3. M

    Replacing thermostat on Mercruiser 470

    I need to replace the thermostat on my Mercruiser 470 (4 cyl, 224 cid, 165 HP). The engine SN is OB749835. I have the thermostat replacement kit, exhaust manifold (sierra 18-0956-1) and elbow gasket (sierra 18-0113-1) on order. Any lessons learned or advice out there? Thanks!
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