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Thread: Oil Drain Plug

  1. #11
    Join Date
    Apr 2008
    Location
    Farmingdale, NY
    Boat
    Searay
    Details
    300 Sundancer MMSI #338122779
    Engine(s)
    twin FWC 275 HP Vortec Mercruisers replacements with Alpha drives
    Posts
    1,477

    Re: Oil Drain Plug

    Get yourself a pump to suck the oil out of the dipstick tube.
    Warm the engine up to operating temperature before you suck the oil out. You'd be surprised how much you get out this way. Not perfect, but the only way to go.
    1987 300 Sundancer
    MerriMack
    Twin FWC 275 HP Vortec Mercruiser Replacements, Alpha Drives
    MMSI #338122779

  2. #12
    Join Date
    Apr 2009
    Location
    Essex, MD
    Boat
    Sea Ray
    Details
    85 Amberjack 255
    Engine(s)
    2010 496 MAG MPI
    Posts
    397

    Re: Oil Drain Plug

    After doing it both ways ............ IMO if you can get to the drain plug to drain it that way once ..... go ahead and put on the remote drain line to make it even easier the next time.
    Nothing Else Matters
    85 Amberjack 255
    2010 496 Mag MPI
    Bravo 1 Outdrive
    Essex, MD

  3. #13
    Join Date
    Sep 2009
    Location
    Munising, Michigan (Lake Superior) Pictured Rocks
    Boat
    Sea Ray
    Details
    1985 270DA Sundancer,Simrad 4G Radar,Lowrance Gen2 GPS/Sonar/Structure Scan,F350 Diesel, tri-axle tr
    Engine(s)
    twin Mercruiser 185R's (v6's) w/SE106 drives, "High Five" stainless props, Mercury 310 w/15 hp Merc.
    Posts
    1,073

    Re: Oil Drain Plug

    ???
    Last edited by KC_Sundancer; 06-06-2010 at 10:23 PM.
    1985 270DA - "Wave Dancer" - Twin 185R's (v6's) - Lake Superior, Pictured Rocks
    Previous:1988 22 Pachanga w/496 cid & Bravo I, Raced:1976 27 Magnum (2002 World Champs)

  4. #14
    Join Date
    Sep 2009
    Location
    Munising, Michigan (Lake Superior) Pictured Rocks
    Boat
    Sea Ray
    Details
    1985 270DA Sundancer,Simrad 4G Radar,Lowrance Gen2 GPS/Sonar/Structure Scan,F350 Diesel, tri-axle tr
    Engine(s)
    twin Mercruiser 185R's (v6's) w/SE106 drives, "High Five" stainless props, Mercury 310 w/15 hp Merc.
    Posts
    1,073

    Re: Oil Drain Plug

    I'm right there with you - get the oil out from the lowest point where it is originally designed to come from.

    I easily change the oil in our 270 DA from the drain plugs using a narrow rectangular pan.

    If acces is a problem they do have drain plugs available with hoses attached for "pumping" from the drain plug. We used them on our race boat and our 22 pachanga. The ends of hoses were capped and fixed near the top of the motors when not in use. On the 22 pachanga I could push the hose out the transom drain to empty into a bucket when on the trailer.
    1985 270DA - "Wave Dancer" - Twin 185R's (v6's) - Lake Superior, Pictured Rocks
    Previous:1988 22 Pachanga w/496 cid & Bravo I, Raced:1976 27 Magnum (2002 World Champs)

  5. #15
    Join Date
    Oct 2006
    Location
    Middle Tennessee/NW Florida
    Boat
    Sea Ray & a Boston Whaler Dauntless (75hp Merc)
    Details
    1996 450DA
    Engine(s)
    3116 Caterpillars
    Posts
    8,515

    Re: Oil Drain Plug

    Look at the inside of a Mercruiser oil pan sometime. Their engineers are not all stupid......they run the dipstick tube to the bottom of the pan so if you draw the old oil out of the dipstick (its a 3/4" hose fitting for a reason) you will get about as much oil out as you do by removing the drain plug.

    The garboard drain takes a bronze plug with regular 1/2" NPT threads.
    Frank

  6. #16
    Join Date
    Sep 2009
    Location
    Munising, Michigan (Lake Superior) Pictured Rocks
    Boat
    Sea Ray
    Details
    1985 270DA Sundancer,Simrad 4G Radar,Lowrance Gen2 GPS/Sonar/Structure Scan,F350 Diesel, tri-axle tr
    Engine(s)
    twin Mercruiser 185R's (v6's) w/SE106 drives, "High Five" stainless props, Mercury 310 w/15 hp Merc.
    Posts
    1,073

    Re: Oil Drain Plug

    Too funny - I don't know about the rest of you but I have seen many mercruiser oil pans. Good and bad, even had them fail with broken baffles that were chewed up in the engine. We built our own engines and raced them for over 3 years, National and World Championships, with NO problems. Is oil changing from the drain plug and taking advantage of gravity a contributor - who knows. Just posting my thoughts to help others make their own oil changing choices.

    I am an engineer by the way and NOT a stupid one either - THANKS !!!!!!!!!!!
    1985 270DA - "Wave Dancer" - Twin 185R's (v6's) - Lake Superior, Pictured Rocks
    Previous:1988 22 Pachanga w/496 cid & Bravo I, Raced:1976 27 Magnum (2002 World Champs)

  7. #17
    Join Date
    Jun 2007
    Location
    Western, MA
    Boat
    Sea Ray
    Details
    200 Sundeck 2005
    Engine(s)
    4.3 MPI Alpha I Gen II
    Posts
    1,426

    Re: Oil Drain Plug

    Tempo Oil Boy worked awesome for me
    Dream Weaver
    '05 200 Sundeck 4.3 MPI Alpha

  8. #18
    Join Date
    Apr 2009
    Location
    Traverse City Michigan
    Boat
    Searay
    Details
    1990 280 Sundancer
    Engine(s)
    Twin 5.0 Alpha Ones
    Posts
    61

    Re: Oil Drain Plug

    Do they make different size or thread types on the garboard plug? Mine will screw all the way in by hand.
    Traverse City, Mi.

    1987 250DA, 260hp, Alpha 1 SOLD!
    1987 21' Sorrento OB SOLD!

  9. #19
    Join Date
    May 2010
    Location
    Boating on Raystown Lake, Pa
    Boat
    Sea Ray
    Details
    restored 1976 SRV200
    Engine(s)
    188 Mercruiser I/O
    Posts
    4,497

    Re: Oil Drain Plug

    The oil tube is another reason you don't stick a car engine in a boat without modifactions. Boat dip sticks are made to be used as oil extraction devises. Suck the oil out and be done with it. If you do regular maintanence then no need to worry about sludge build up. Thats what the filters for. Use good oil and a great filter and the engine will last many seasons.

    If you try the next size bigger plug (3/4 NPT) and it's to big then the drain threads in the garboard may be bad. Unless your confortable with playing with holes in the transom have a technician replace it.

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