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  #1  
Old 04-27-2009
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yanmar question

hi all-
for all you yanmar people: I have a 2gm20F; had the boat about a year and have noticed that the fuel intake "nipple" on the engine (ie where the fuel line from the fuel filter connects to the engine just above the primer pump) is always a bit wet with diesel. I just changed all my fuel lines and was hoping that a new line/tightened-up hose clamp would get rid of that leak. As soon as I popped off the old hose the nipple swung down (ie the nipple piece was totally loose on the engine). I took it off, cleaned it, replaced it and put the new hose on tight. At rest there is no leak but I did note after running the engine for a few hours yesterday again there is wetness back there (I don't see it actively dripping but still wet). Any ideas? What else might be leaking?

thanks

brad
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Old 04-27-2009
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Did you use a sealer on the threads on both the tank and pump?
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Old 04-27-2009
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not sure I know what you mean by "tank and pump" (fuel tank?) but I definitely didn't use any thread sealant- didn't think of it since those copper washers were further out than the threads. But just to be clear that we're talking about same area- I am referring to the nipple/barb on the engine onto which the fuel line connects coming from the primary fuel filter.

Maybe I should use a thread sealant- hadn't thought of it.

Thanks
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Old 04-27-2009
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Can you replace the nipple? If someone cut the hose lengthwise to remove it from the nipple at some point they may have scored the metal which can cause a leak.

Copper washers need to be replaced if they are loosened and tightened a few times. They are supposed to crush a little when tightened.
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Old 04-27-2009
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hmm- maybe I'll replace the washers. The nipple is easily removed and looks good.

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oops
I was think of the wrong fittings.

Replace the crush washers as suggested by Steve
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