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    Circulating pump problem 4.3 Mercruiser 1993

    I have redone the cooling system with new manifolds , new thermostat , risers , ect , New in lower . New water pump , I cant get it to seal , flowing water all over the place !! Can I have the wrong pump ? This is what I bought quicksilver . My old pump had 3 holes on left hand side , this just...
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    Two Issues

    One I rebuilt cooling system , have good flow to engine . I tested her at idle on cuffs today and guage went to 220 alarm never went off how ever with IR thermometer , thermostat housing read 147 ! Is this a gauge issue or sending unit issue ?? When I cut it off it wants to run on ??? How to...
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    4.3 over heating at low rpm Help

    I have a 1993 4.3xl Mercruiser in a 2050 Chaprell , boat runs great how ever pulling throttle back in no wake zones over heating alarm goes off . Open her up and she cools down ... I replaced 160 deg thermostat last season to a 140 and no difference ... drilled 3 -1/4 inch holes in thermostat...
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    Outdrive specks for serial number OD864087 outdrive

    I blew the upper gears on my outdrive serial number OD864087 need to know specks ? where to find ?? Thank you from an old fart !
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