Results 1 to 5 of 5

Thread: Exhaust smell

  1. #1
    Join Date
    Jun 2008
    Kingston, Wa, USA

    Default "I have a 260HP Merc Alpha I o

    "I have a 260HP Merc Alpha I on a 220 Searay. I have owned it 3 years. Engine runs strong, idles well and has no performance issues. However, at idle, either at the dock or coming into the dock, I am getting a strong exhaust smell. I have changed plugs, pick up coil,rotor, cap, and checked the timing and plug wires. All that checked out well. Next, I checked the choke, it was open. I changed the water filter. Still no luck. The smell seems to be coming from the rear of the boat, not from the engine compartment. It just started last summer. I did notice that the exhaust comes up against the transom, and not from the hub of the prop at idle. Not sure if this is normal. I am about out of things to check. Anyone ever had a similar problem??"

  2. #2
    Join Date
    Aug 2006
    SW Ohio, USA

    Default "Exhaust smell depends on the

    "Exhaust smell depends on the wind direction when my 4.3L is at idle. You may have a hole in the rubber exhaust tube or bellows. Check all the bellows. Mine are 3 yrs. old. If yours are near 10 or more yrs. old, time for a complete bellows set change. Not cheap."
    Fix minor things (replace wear items for preventative maintenance.) that cause major problems before they break.

  3. #3
    Join Date
    Feb 2008
    Lake Norman, NC

    Default "Some exhaust smell coming fro

    "Some exhaust smell coming from the exterior transom area seems normal. I have observed this all my life in just about every boat. I catch it also when starting up at the dock as the exhaust rises from the water and the wind blows it into the dock, and also while backing out. Once underway, no odor."

  4. #4
    Join Date
    Aug 2006
    Calgary, Alberta, Canada

    Default "Sounds like your exhaust bell

    "Sounds like your exhaust bellows is shot.
    You can check this easily with the drive fully up and turned to one side.

    The exhaust bellows is the one thats about 2-1/2 inches diameter, below the much larger upper one.
    If its ruptured, your exhaust will come out there at low speeds, instead of your prop.

    The good news is that other than an inconvenience, it won't hurt anything. You can run like that indefinitely.


  5. #5
    Join Date
    Apr 2007
    Seattle, WA,

    Default My uncle had a 33' Carver

    My uncle had a 33' Carver with twin 350's. Just by design the back of the boat would fill with exhaust fumes while underway. You could not stand in the back while cruising or you would probably pass out from OX poisoning. I'm glad he got rid of that one.

Similar Threads

  1. hot engine not starting good smell of fuel and blue exhaust 2001 150hp
    By bushdoctor in forum Yamaha Outboard Forum
    Replies: 4
    Last Post: 08-25-2010, 12:58 PM
  2. Gas smell
    By bushwood in forum Chrysler Inboard and Sterndrive Forum
    Replies: 3
    Last Post: 06-20-2009, 11:47 PM
  3. 2003 81 volvo gi bad smell exhaust
    By doral36 in forum Volvo Penta Gas Archive
    Replies: 6
    Last Post: 10-07-2008, 06:19 PM
  4. LM360 rough idle with gas smell from exhaust
    By aday_in_nh in forum Chrysler Inboard and Sterndrive Archive
    Replies: 1
    Last Post: 07-28-2008, 11:22 AM
  5. Gas smell
    By webenergy in forum Johnson Evinrude Outboard Archive
    Replies: 4
    Last Post: 06-19-2007, 11:28 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts