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Old 01-04-2017, 12:07 AM
deer4011 deer4011 is offline
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Boat: Mastercraft S&S 82' 351W
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82 Fuel Leak

Decided to start my boat up for a few seconds in the garage to see if it would start...It started right up but noticed a decent fuel leak right where the hard line meets the carb. What is the procedure for fixing this i noticed the PO used teflon on the threads but I am suspecting that may have caused the leak.
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Old 01-05-2017, 01:17 AM
deer4011 deer4011 is offline
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Buler???
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Old 01-05-2017, 01:47 AM
MC197indy MC197indy is offline
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Last edited by MC197indy; 02-17-2018 at 12:02 AM.
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Old 01-05-2017, 07:47 AM
93xs2003 93xs2003 is offline
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Boat: Mastercraft, Prostar 190, 1992, 351W
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Post #5 (snug hard line then tighten carb base)


Also: Don't use Teflon tape in fuel system. Fitting is sealed to carb by gasket and to hard lineby flare.
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  #5  
Old 01-05-2017, 08:01 AM
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CantRepeat CantRepeat is online now
 
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If the OP is using teflon tape on that fitting then something is wrong. That is a flared joint and needs nothing else to seal. I would remove the hard line and check for damage to the flare on both the hard line and the carb fitting.



And yeah, I'm not up posting on TT at midnight.
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Old 01-05-2017, 09:33 AM
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ski_king ski_king is offline
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Boat: 1982 Skier19, Powerslot, 351PCM
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For what ever reason, mine typically has a slight leak there each spring when I de-winterize it.

Based on Can't Repeats photo above, mine typically leaks between the big fitting and the carb. I have replaced that fitting and gasket several time over the years (I have owned the boat for 35 years).

Part of my de-winterizing is to snug up each end of the fuel line and watch it close.

Be sure to spend a few dollars on a good set of fuel line/brake line wrenches.

Checking for fuel leaks is something I do ever time I put the boat in the water.
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Old 01-05-2017, 10:25 AM
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CantRepeat CantRepeat is online now
 
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Quote:
Originally Posted by ski_king View Post
For what ever reason, mine typically has a slight leak there each spring when I de-winterize it.

Based on Can't Repeats photo above, mine typically leaks between the big fitting and the carb. I have replaced that fitting and gasket several time over the years (I have owned the boat for 35 years).

Part of my de-winterizing is to snug up each end of the fuel line and watch it close.

Be sure to spend a few dollars on a good set of fuel line/brake line wrenches.

Checking for fuel leaks is something I do ever time I put the boat in the water.
I do the same. Hell I do it every morning while at the lake and look for any type of leak at that.
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Old 01-05-2017, 11:47 AM
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thatsmrmastercraft thatsmrmastercraft is offline
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This leak is pretty common. If inspecting and cleaning don't solve the problem, consider a new carb fitting and fuel line. At this point both are old and worth replacing.
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  #9  
Old 01-06-2017, 09:58 PM
MikeyOrange88 MikeyOrange88 is offline
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@CantRepeat
As good as everything else on that motor pix looks, $0.69 will get you a new clear vinyl hose from fuel pump to the flame arrestor. Strange, but I notice that on a lot of the pix here on TT. If you go, go all the way.
No flame-back necessary.
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