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Bilge smell in cabin
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RiverRatt
#1 Posted : Sunday, August 22, 2010 2:45:11 PM(UTC)
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I am getting a bilge smell in cabin. After I running the boat I run the blowers for a few minutes (over 5-10 minutes) The gas evaporates out of the carbs and will set off the sniffer after about a 1/2 hour. I run the blowers for a few more minutes the sniffer quiets down. I get a bilge smell in the cabin after the boat is closed up for a few days with the A/C on.

Is this common?
(If I do not come down for a couple of day the carbs are dry and they do not start easy) See Jeffs post.

I am planning to build a continuous duty bilge vent. I would like to use a 120V or 12V computer type fan with ball bearing that can be run 24-7. I am going to have to find a fan that is ignition protected or a sealed motor. It does not have to move a lot of air just enough to keep a small negative pressure in the bilge.

"The is no dumb-ass vaccine" - Jimmy Buffet
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fastjeff
#2 Posted : Sunday, August 22, 2010 9:02:04 PM(UTC)
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Ratt:

You must have a gas leak somewhere down there, and that's bad news. Start at the tank fuel level senders (I had a gaskey leak on me there) and proceed all the way to the carbs.

Jeff
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tundrarules
#3 Posted : Monday, August 23, 2010 9:55:08 AM(UTC)
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Explain what you mean by bilge smell, oil, fuel, or stagnant water??

Where is the A/C drip pan drain line going? Is it pumping out of the shower pan?

BigM
1985 Marinette 29 Sedan bridge
Twin 318s, 660 hours
New Edelbrock 1409 carbs (working like a charm)
Original Electronic Ignition, Blaster 2 coils, 90 deg plug wire universal kit cut to fit
Raw water system
Freshwater always
Located Pickwick Lake, TN,MS,AL

RETRO BOATS ARE COOL

If the guys on this forum take their time to help you, have the courtesy to update your thread with the resolution.
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RiverRatt
#4 Posted : Tuesday, August 24, 2010 12:23:54 AM(UTC)
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I have been concerned about a fuel leaks. I have checked all lines and fittings. I have the stock copper lines with the chrysler inline filter. I replaced the PERKO water seporator with a spin on type. The only rubber fuel lines are between the fuel pump and valve I replaced the fuel tank sender gaskets last year. (Noticed fuel seeping when the tank was full) The vapor alarm only goes off when the engines are warm. After they cool down or after a few hours I do not get an alarm.

On the smell my wife thinks is smells like gas I think it smells of the engine compartment stale gas oil water smell. The cabin compartments are dry.
"The is no dumb-ass vaccine" - Jimmy Buffet
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dependo
#5 Posted : Tuesday, August 24, 2010 12:42:31 AM(UTC)
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Riverrat. Often overlooked is the fuel fill and vent hose. My fill hose had never been changed in 36 years. When filling My alarm would go off. The ladies can smell things we can't . Remember they can smell a dirty dipper a room away. I'm glad I can't smell what they can. Wayne
1973 express FB 32ft
twin 318
"Southern Lady"Chattanooga
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jralbert
#6 Posted : Tuesday, August 24, 2010 4:16:10 AM(UTC)
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Have you given your head plumbing a close nose test?
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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tundrarules
#7 Posted : Wednesday, August 25, 2010 11:07:53 AM(UTC)
tundrarules

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Do you still have the old Carter carbs? My old Carter AFBs were running very rich or I had a seal leaking in the body, which caused a strong fuel smell in the cabin. I put on reconditioned 1409s and the smell went away.... Applause most of the smell that is. I think I still have a faint fuel smell. I will be replacing the fuel tank sending unit seal soon.

Here's the link to the Carter carb replacement thread http://www.marinetteboat.com/forum/yaf_postst2510_Gas-smell-in-cabin.aspx

Does anyone know were I can get a fuel tank sender gasket for 100 gallon tank? (1985 29 Sedan, twin 318s)
1985 Marinette 29 Sedan bridge
Twin 318s, 660 hours
New Edelbrock 1409 carbs (working like a charm)
Original Electronic Ignition, Blaster 2 coils, 90 deg plug wire universal kit cut to fit
Raw water system
Freshwater always
Located Pickwick Lake, TN,MS,AL

RETRO BOATS ARE COOL

If the guys on this forum take their time to help you, have the courtesy to update your thread with the resolution.
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jhemp3
#8 Posted : Wednesday, August 25, 2010 10:42:33 PM(UTC)
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If it is a "rotten egg" smell, it could be your hot water heater. A small dose of Clorox in the water tank has helped to eliminate the issue in Detour.
Jim
Jim Hemphill
Detour
'87 32' FBS, USCG Certification #1057921
Berthed MM 207 Tennessee River, Picwick State Park Marina
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BCassedy
#9 Posted : Thursday, August 26, 2010 12:49:54 AM(UTC)
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Here's a link to a local place I just got a Moeller unit from:
http://www.hernshipstore...ding+Unit+12-24%22.html

Admittedly, I've got 75 gal tanks, but I had to trim off a section from the bracket (per instructions) so you may be able to use it for a 100 gal unit.

Bill
Bill & Sharon Cassedy
" Sunset Seeker "
1988 32' Fly Bridge
Twin 318 Cu In / 240HP Chrysler power plants
Raw water cooling
Freshwater boat
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