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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 11-09-2011
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It's a Racor filter with an o ring inside the cap. I'll put that at the top of my to do list this wknd. I'd rather not mess with anything complicated. I'm hoping it's something simple. Thanks for the reply!
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  #12  
Old 11-09-2011
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Quote:
Originally Posted by beachmont View Post
If you can start with quick start it's air/ fuel I got air on mine draining the fuel filter Cracked injector line bleed air out that way If you google check out owners man. It will tell what to do
If your Yanmar has a pre-combustion chamber be really careful not to use too much ether as it can cause severe damage. I used just a whiff on a VW diesel in 15 degree below Fahrenheit weather and got away with it. I have read WD-40 is safer to use as starting fluid? You should be getting a strong spray right at the injector. Anything less points to an air leak or maybe a clogged injector which should be easy for a shop to check. As mentioned earlier last resort is the injector pump.

Dabnis
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Old 11-09-2011
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no start yanmar

i recently experienced a similar situation with a yanmar 2gm.there was water in the fuel,which doesnt like fire in an engine.hows your fuel?the water also wears out your pump and injectors if enough goes thru them.i hadf mine rebuilt and drained the water, engine ran good forn twenty minutes and thru a rod,i now have a brand new pump and injectors for sale.if interested contact me. dvdheg@yahoo.com
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Old 11-09-2011
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Quote:
Originally Posted by davidheg View Post
i recently experienced a similar situation with a yanmar 2gm.there was water in the fuel,which doesnt like fire in an engine.hows your fuel?the water also wears out your pump and injectors if enough goes thru them.i hadf mine rebuilt and drained the water, engine ran good forn twenty minutes and thru a rod,i now have a brand new pump and injectors for sale.if interested contact me. dvdheg@yahoo.com
Any connection between the two?

Dabnis
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no start yanmar

one injector wasnt squirting for quite some timer, and i think it caused a problem on the cylinder walls
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Old 11-10-2011
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Originally Posted by davidheg View Post
one injector wasnt squirting for quite some timer, and i think it caused a problem on the cylinder walls
Very interesting, was the rod bent, or the bearing damaged or what? Thanks for the reply.

Dabnis
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Old 11-10-2011
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The boat owner says there is no air in the lines. Therefore, there may not be an air leak. Maybe there is water in the fuel, but I think he checked for that. Black smoke he says. I would check the injectors, if you have extra injectors, just swap out and see if that takes care if it. You should carry spares anyway so maybe just buy some to have on hand even if it isn't injectors. It might be low compression so buy an compression guage for diesels. This is another one of those things a do it yourself person should have on hand. Check air cleaner and piping for it. Black smoke means too much diesel for the amount of air. If air in lines, there is not enough diesel so no black smoke. Anyway I am thinking injectors. I think Yanmar is a direct injection engine, no pre-combustion chanber, therefore no glow plugs. You need really good batteries to spin the engine hard to get it started.

Last edited by LakeSuperiorGeezer; 11-10-2011 at 05:57 PM.
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Exhaust elbow. Air has 2 parts - in and out. If it can't get out it can't run.
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I'm going out today with new filters, new fuel, and some more bleeding. The fuel is rather old, so filling my primary filter with new fuel should eliminate one of the variables.
Thanks for all the suggestions.
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no start yanmar

I got out to the boat this afternoon, changed the racor primary filter with new O rings, changed the fuel filter, added fresh diesel to the primary filter, bled the system again all the way to the fuel lines where they enter the cylinders. Still no start...the engine cranks, tries to fire but won't sustain itself. The air intake emits a puff of smoke when I top cranking.....still puzzled....and getting a bit frustrated.
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