Bleeding your Yanmar Engine - Page 3 - SailNet Community
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post #21 of 39 Old 07-28-2008
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I don't bleed my lines when I change fuel filters, (Yanmare 3GM) and have never had a problem.

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post #22 of 39 Old 07-30-2008
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On my Yanmar 2QM15 engine the return fuel line doesn't run to the fuel tank, but to another input connection to the Yanmar's local fuel filter housing assembly. When I had a mechanic service the engine after buying my boat, he bled the fuel system by simply using a hand held pump like he used to extract the dirty oil, and connected it to the end of the return hose. As he applied suction, the fuel was pulled from the tank, through the fuel line, through the new Racor assembly, through more fuel line, through the Yanmar fuel piping system and out the return line. Once he saw some come out the return line, he just connected the hose back to the fuel filter assembly, tightened the hose clamp, and the engine fired right up on the first try.


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post #23 of 39 Old 08-14-2008
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The lift pump sounds like a good idea. Which Facet model would be the right size for a 20HP 3GM(D)? I noticed Jody installed it after the Racor. Is there a reason not to install it before the Racor?
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post #24 of 39 Old 08-14-2008 Thread Starter
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The lift pump sounds like a good idea. Which Facet model would be the right size for a 20HP 3GM(D)? I noticed Jody installed it after the Racor. Is there a reason not to install it before the Racor?
Any of the three models they sell will work - I opted for the largest for optional ability to do fuel polishing if the need arised. I install after the Racor because the racor is designed to be the primary fuel filter. The Facets do also have a fuel filter - but not nearly the capacity ( < 5% of the Racor) - so I suggest putting it afterwards...

-- Jody

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post #25 of 39 Old 08-16-2008
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I agree with a sqeeze bulb, I have it for 27 years on diesel fuel and it is still working.
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post #26 of 39 Old 08-16-2008
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Great post. I have the squeeze bulb installed before the Racor, works great and for $13 what a value. Whether electric pump or squeeze bulb, they both make bleeding so much easier than the little manual actuatuion of the Yanmar lift pump.

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post #27 of 39 Old 08-16-2008
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Great post. I have the squeeze bulb installed before the Racor, works great and for $13 what a value. Whether electric pump or squeeze bulb, they both make bleeding so much easier than the little manual actuatuion of the Yanmar lift pump.
JIM-- I keep meaning to do this because of your prior recommendations. This will go on the winter project list. Thanks!

Mitch
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post #28 of 39 Old 08-17-2009
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The pictures were a great asset to the description. However there is one small error. The last picture posted is labeled with "hi" and "low" side backward on the injectors. The fuel lines entering the side of the injectors are the "high side" (17mm) and the banjo bolt (14mm) on the top of the injectors are the "low side" return.
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post #29 of 39 Old 03-22-2012
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Re: Bleeding your Yanmar Engine

I'm sending this to build up my posts so I can see the pictures. I guess that's how it works. Going to change the filters on my 2GM this weekend and keep reading about the horror stories of getting air in the line, lol. I think I'm going to run it, change out the primary, run it again for 1/2 hour, then change out the primary, then run it again for an hour to make sure it's not going to stop on me. Gotta move my Watkins 30 down the TN river this weekend.
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post #30 of 39 Old 03-22-2012
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Re: Bleeding your Yanmar Engine

Meant the secondary.
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