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"Sweating" Fuel Line Connection

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gsyogi View Drop Down
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    Posted: August-03-2016 at 7:27pm
Hey guys ... it's been a while ... our little '94 has been running great. 2nd to last day of our annual summer boating vacation and during my morning inspection I noticed the fuel line connection to the carb was "sweating" fuel ... just a residue (I can dab it off with paper towel ... the temps here in KY are close to 90F and near 100% humidity). There are NO drips on the metal fuel line and NO drops on the manifold ... just a bit of fuel "sweat" around the connection (see pic). I have Bri892001's (what a great post) Rochester Carburetor Wrench on my onboard kit ... but am not much of a mechanic. As I have everyone that I love and care about on our little skier (i.e., my wife and two children), I want to make sure I/we are safe. Like I said, would like to use our boat for the last two days but I am a "safety first" guy. Thanks in advance.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 7:44pm
Brian,
That's a pretty common problem. What is happening is when the inverted flare fitting on the steel line is tightened, it twists the steel line. Then the steel line want's to go back to it's original position but when it does, it also loosens the inverted flare fitting and or the flare adaptor in the body of the carb. The solution is to lubricate between the flare nut and the steel tubing with some grease. You do not want to get any grease on the flare itself.


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gsyogi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gsyogi Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 8:34pm
Peter, I have some silicon grease ... should I use that? Is there any way you can show (i.e., point/describe) exactly where to place the grease? Again, I confess I am not much of mechanic ... although I desire to fix that. Ok, to run it for our last two days, "as is"?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KooK Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 8:57pm
Is that Red RTV Silicone around your fuel line fitting?
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gsyogi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gsyogi Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 9:07pm
A ... don't know. Purchased the boat with it like that 5 years ago ... never a hint of a fuel issue ... impeccably maintained since I took delivery. I only have some clear silicon grease on hand out here in the country ... Kind of looking for a "vacation saver" answer?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gsyogi Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 9:15pm
Actually, I have some AGS White Lithium Grease, some Lube 111 silicon grease, and tube(s) of red & blue thread locker in my onboard kit ...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dreaming Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 9:30pm
either grease will work for the purpose, but if you grease and tighten the fitting, make sure you just tweak it, or you'll have a bigger problem than you have now.    are you anywhere near an automechanic?   I bent my own fuel lines in about an hour, out of steel brake line tubing (with the double flared end)    in a pinch you could have someone do that at a local garage.   if you go this route, YOU MUST USE A DOUBLE FLARE. (not yelling, just ensuring that you see that part ) the red rtv on the nut would indicate that there was a problem in the past that the PO couldn't fix.    stay away from the thread locker in this application
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gsyogi Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 9:45pm
Got it ... unlikely to try to fix this myself ... should I put the boat on the trailer or run it?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 10:47pm
Silicone will fall apart if exposed to gasoline or gas vapor. Works for many things great but not for any gasoline project.
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8122pbrainard View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: August-03-2016 at 11:12pm
Originally posted by gsyogi gsyogi wrote:

Actually, I have some AGS White Lithium Grease, some Lube 111 silicon grease, and tube(s) of red & blue thread locker in my onboard kit ...

Originally posted by Dreaming Dreaming wrote:

either grease will work for the purpose,]
Originally posted by MrMcD MrMcD wrote:

Silicone will fall apart if exposed to gasoline or gas vapor. Works for many things great but not for any gasoline project.

Mark,
Please read:
Originally posted by 8122pbrainard 8122pbrainard wrote:

Brian,
The solution is to lubricate between the flare nut and the steel tubing with some grease. You do not want to get any grease on the flare itself.


The grease isn't in contact with gas!!
Brian,
That sure does look like red RTV so there was a problem at one time. The boat may have been maintained but whoever put the RTV on, was a hack!


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Post Options Post Options   Thanks (0) Thanks(0)   Quote gsyogi Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 12:56am
Pete, Thanks ... actually, thanks to all! MrMcD that is a super looking boat ... wow! Anyway, I decided to "man up" (a guy will do a lot to save the last couple of days of vacation) ... I used my onboard "carb kit" (which, by the way, I put together from this site ... thank you) ... and fixed her right up! Dry tonight ... got a couple of long pulls for everyone in. I will be sure to post up the long-term fix as it proceeds once I get back to Denver. (I will also be watching it like a hawk tomorrow as the gas gets to my "repair") ... loosened lower nut and tightened the upper by 1/8th turn.   

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Gary S View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary S Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 2:34am
Pete I don't think Mark said anything about grease ?
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8122pbrainard View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 7:06am
Originally posted by Gary S Gary S wrote:

Pete I don't think Mark said anything about grease ?

Now I'm confused!
Mark,
Where you referring to the silicone grease or the RTV? If the RTV, I agree that it does not hold up around gas.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 10:02am
Originally posted by gsyogi gsyogi wrote:

   (I will also be watching it like a hawk tomorrow as the gas gets to my "repair") ... loosened lower nut and tightened the upper by 1/8th turn.   

Brain,
Don't be surprised if it loosens up again. If it does, I feel you'll need to go deeper into the problem. The RTV has got to be removed. A new gasket for the adapter is needed Then the grease under the inverted flare nut. When tightening the flare nut, it will help if you can grab onto the steel fuel line preventing it from twisting/winding up. I use a vise grip with a chunk of rubber to protect the tubing.

Great to see you have the flare nut wrench and the thin wrench for the carb adapter. The spot is a rear PITA to get to without them.


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Jonny Quest View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jonny Quest Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 10:46am
Glad to see that you used a flare-end wrench for the soft brass fittings. I've seen a lot of buggered-up stuff from people not using or knowing about flare-end wrenches.

You also may want to consider changing out the fuel line -- assuming that the culprit is the the flare end at the carb.

www.skidim.com has 2 fuel line options:

Hard Fuel Line

Flex Fuel Line

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: August-04-2016 at 11:45am
Originally posted by Jonny Quest Jonny Quest wrote:

You also may want to consider changing out the fuel line -- assuming that the culprit is the the flare end at the carb.
JQ

JQ,
Sounds like the flare is good and it was only the adapter on the carb.
Originally posted by gsyogi gsyogi wrote:

and fixed her right up! Dry tonight ... loosened lower nut and tightened the upper by 1/8th turn.   


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