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    2 mysterious holes on intake manifold

    Can't seem to find them in a picture anywhere.<br /><br />On the intake manifold of a 1990 4.3L directly under the automatic choke side of the carburetor there are 2 holes that go into the intake.<br /><br />Anyone know what these are for and should they be plugged or should something be going...
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    do exhaust manifolds cause engine water problems?

    First off, thanks DonS for the advice on the merc manual for my engine, it came today. I have to get the sterndrive one next.<br /><br />Now the boat - 1990 4.3 V-6 Eng # 0C766244 that sat for a long time. I'm having the same problem as tashasdaddy with the milkshake oil from ugly sludge...
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    witts end 4.3 merc - no power under load

    1990 Mercruiser 4.3 262 Carbed Engine Thunderbolt IV Ignition - boat recently sat for 18 months<br /><br />Just explained to the wife what happened yesterday on the water and her reply was to post it here verbatim. She's tired of seeing me going bald from a full head of hair 3 weeks ago<br /><br...
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    Problems Changing Plugs 1990 Mercruiser

    I just bought a 1990 Galaxy with a V-6 mercury inboard motor. I ran the junk gas that was in it because I didn't know any better.<br /><br />Now, since I have the tank spotless, new filters, new gas, I have no spark.<br /><br />It looks like I fried a couple plug wires that were close to the...
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