Gas fumes in garage.

Discussion in 'Sport Boats' started by The NY Dad, Sep 3, 2017.

  1. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    We have our 185 sport stored in a garage, there is nothing else with gas in it, in the garage. I went in there the other day and there was a faint smell of gas. The boat is a carbureted 4.3l. At first I thought it was due to gas in the float bowl of the carb, but then I got thinking about it and I've had a lot of carbureted cars, toys, and lawn equipment in a lot of garages and never smelled gas. So my questions are, is this normal for this boat, and if not what is causing it and how can I eliminate it? I have things in the garage that I don't want smelling like gas and moving them somewhere else is not feasible, and neither is putting them in sealed containers or wrapping them in plastic.
     
  2. blaster

    blaster Active Member

    May 23, 2011
    potomac river
    2010 sea ray 205 sport
    F150 5.4 xlt 4x4
    Mercruiser 4.3 mpi alpha 1.62
    It's probably coming from the fuel vent.
     
  3. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    Is it safe to plug it while it is in the garage, as long as i put a sign in the boat to unplug it before it is started
     
  4. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    Not really, find the source or risk blowing the garage up ,up and away
     
  5. blaster

    blaster Active Member

    May 23, 2011
    potomac river
    2010 sea ray 205 sport
    F150 5.4 xlt 4x4
    Mercruiser 4.3 mpi alpha 1.62
    Maybe put charcoal in a mesh bag over the fill/vent rather than block it. Blowing up the garage seems a bit alarmist. Sure it's possible but it would take a lot of vapor and an open flame.
     
  6. The NY Dad

    The NY Dad Member

    52
    Jul 10, 2017
    Arizona
    2010 185 sport
    190hp 4.3l Mercruiser
    I'll give the charcoal idea a try, theirs a pet store with aquarium supplies close by.
     
  7. dieselsmoke

    dieselsmoke Member

    65
    Aug 21, 2016
    nj
    2004 Select 220
    5.0mpi bravo
    I also have a 185 4.3 carb in my garage and I also have a faint smell of gas. I assumed it was just a fact of having a boat in the garage. I leave the engine cover open with a battery tender on and figured that was the reason. I do have windows open so the air can exchange but this thread has me curious. The smell is minimal and I don't think it's dangerous but I'm wondering if there is a simple solution
     
  8. Dan_B

    Dan_B New Member

    10
    Aug 31, 2017
    2001180 BR
    Mercruiser 3.0 Alpha One OD
    You can install an exhaust fan in your garage or you can drain the fuel out of the boat.
     
  9. BillK2632

    BillK2632 Well-Known Member SILVER Sponsor

    Jun 25, 2009
    Lake Norman, NC
    1999 185 Bowrider,
    Mercruiser 4.3, Alpha I
    Fuel systems in a boat are vented unlike a car which is closed - I would think that is why are are smelling gas in a closed up garage. Even though you can smell it, I doubt there is enough fume build up going on to cause a problem. I think it is just the nature of the beast. Is there a window that you could crack?
     
  10. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    tape up the vent
     
  11. dutchman

    dutchman Member

    167
    Aug 26, 2009
    Alberta
    2016 GTS185
    Merc 4.5L MPI 200
    For the last 8 years, I have stored my boats in our attached garage and never get any fuel smell. I guess you could tape up the vent to see if the smell goes away, but I doubt it's the tank vent. I would look under the hood a little closer, even while the engine is running.
    My buddy mentioned he had fuel odor sometimes on his boat. I found the carb had a tiny leak dripping on the manifold. He had been running like that for the past year and lucky that's all that happened.
     
  12. Loyd Dinneen

    Loyd Dinneen Member

    285
    Jul 29, 2017
    Las Vegas
    1977 Sea ray 240 SDA cruiser w/ twin 470 mercs.
    Twin 470 Mercruisers
    One thing to consider is the type of hot water heater you have in your garage. If it is a natural or propane gas one then your in danger of blowing up your garage, it is why you don't store gas in a garage.
     

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