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  1. #1
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    2005 Mercury Verado 225 smoking

    Have twin merc 225 verado's on a 30' Concept CC with approx 500 hrs, port engine began smoking, no codes, didn't feel like it lost power, etc., pull plugs find oil in # 5 and #6, do a compression test all cylinders approx 125, took to local dealer, they check supercharger and say checked good, did a leak down and tested good........ Week later mechanic says #5 and #6 oil seals bad and wants to replace the powerhead, tell them to button it up and will come pick it up, not very confident in our local service departments on these so trying to get opinions and info if anyone else has had a similar problem or areas to check. Thanks in advance for any input.

  2. #2
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    Tourist Trap, Florida
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    Sounds weird that it passed a leakdown with leaky oil seals on the valves? Not a verado user, but that makes me suspicious.

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
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  3. #3
    Join Date
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    LEBANON OREGON
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    its the plug O rings between the cavity for the plugs and the valve cover, just do a Gasket set and to do Valve seals Cams have to be removed, ive seen it on an 04 i service, it comes from the thread side of the plug around the spark plug itself, unless it smokes heavily then you may need guides but at 500 HRS the guides shouldnt show that much wear... whats the oil level, and how long since last oil change... after making QUARTS of oil i switched engine oils to Certified Labs Full Synthetic and that problem stopped

    4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she


    things that were are no longer as they are today...

  4. #4
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    Hollywood, MD.
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    Check out this site. Lots of verado gurus on there. http://www.veradoclub.com/
    2017 30 Concept, 2006 30 Superboat (Sold), 1998 24 Superboat (Sold)

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