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Old 16-10-2010, 13:35   #16
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Diesel fuel will ignite readily, and burn freely, if heated beyond 150* F.
Don't confuse this with spontaneous (compression) ignition when pressurized to 15 to 22 atmospheres in a cylinder.
I am completely at a loss.
The motor is inside the boat, I must replace the injector.
I have twisted with pipe wrenches, pulled and tapped like a mad man for about a week 2x a day with no luck with lots of pb blaster.

Does anyone suggest heating up with a torch still?
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Old 16-10-2010, 13:45   #17
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Start up the engine.. and let her run at a higher revv.. One of mine came loose that way. Only by mistake though since one of the bolts holding the clamp gave away. It´s an old VP though and maybe Yanmars´ injectors are fitted differently. But if all else fails, at least it might be worth a try
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Old 16-10-2010, 13:46   #18
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I am completely at a loss.
The motor is inside the boat, I must replace the injector.
I have twisted with pipe wrenches, pulled and tapped like a mad man for about a week 2x a day with no luck with lots of pb blaster.

Does anyone suggest heating up with a torch still?
My comment was a caution to what I thought was an over simplification of diesel fuel igniting, and the attendant risk. 20 yrs in the fire service, 6 as a fire chemistry instructor.
By now, I would have removed the cylinder head to my workshop.
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Old 16-10-2010, 13:48   #19
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Have you tried warming it up by running the engine with a slightly loosened injector?
Just hope the thing is still good enough to get it up an running....
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Old 16-10-2010, 14:03   #20
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My comment was a caution to what I thought was an over simplification of diesel fuel igniting, and the attendant risk. 20 yrs in the fire service, 6 as a fire chemistry instructor.
By now, I would have removed the cylinder head to my workshop.
Lucky you!

My workshop would be a windy and sandy beach as I am cruising.
At best it would be my foredeck or cockpit.
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Old 16-10-2010, 14:04   #21
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Have you tried warming it up by running the engine with a slightly loosened injector?
Just hope the thing is still good enough to get it up an running....
Thanks,
I may have to give that a try.
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Old 16-10-2010, 14:10   #22
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Thanks,
I may have to give that a try.
If you try it make sure the nuts holding it down are in place but just a little loose (like half a turn or so). Do not put any body part in the path of the injector when you try it.....
Let it run briefly and check; repeat a couple of times and maybe you get lucky.
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Old 16-10-2010, 14:16   #23
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If you try it make sure the nuts holding it down are in place but just a little loose (like half a turn or so). Do not put any body part in the path of the injector when you try it.....
Let it run briefly and check; repeat a couple of times and maybe you get lucky.
You wont have to check it.. you´ll hear it loosen. Promise. It goes Tjoooff Tjooof Tjooof
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Old 16-10-2010, 15:17   #24
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Sorry if my flip answer was not much help Just sharing your frustration, having been thru a similar situation just recently.
Can't link it, but found this site, where there seems to be some possible help,
www.tractorbynet.com/forums/yanmar/171020-injector.

Don't know where you are, so can't help with where you would get something (or make) like a slide hammer and some metric bolts. Hang in there,
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Old 17-10-2010, 12:10   #25
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Quote:
Originally Posted by Blue Stocking View Post
Sorry if my flip answer was not much help Just sharing your frustration, having been thru a similar situation just recently.
Can't link it, but found this site, where there seems to be some possible help,
www.tractorbynet.com/forums/yanmar/171020-injector.

Don't know where you are, so can't help with where you would get something (or make) like a slide hammer and some metric bolts. Hang in there,
thanks....
there is alot of info there, good reading.

i needed the motor today and re-connected the lines and bled them.
i noticed the penetrating oil bubbling out, so i do know there is a seam there now.
or it could have been diesel fuel.
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