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Old 11-07-2016, 18:14   #1
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Injector stuck

Need some ideas I am removing the injectors on my Yanmar 35hp for service 2 have come out easy but one is jammed in. I suspect there is some rust down the sides and have applied the "penetrating fluid and tapping" trying to loosen it but not happening. I know that a slide hammer is used a lot for this but the Yam injectors don't have
some where to get that to hold.

Any ideas would be helpful
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Old 11-07-2016, 18:36   #2
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Re: Injector stuck

You can try a hose clamp around the injector and then a wedge of some sort. Also a clamp or vice grip. A small wedge under the flange.
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Old 11-07-2016, 20:21   #3
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Re: Injector stuck

Use a crow foot wrench if you have one or a combination if it will fit to gently turn the injector back and forth. Use a L shaped pry bar, called a pinch bar or heal bar or? to apply pressure under the fitting port while turning back and forth. Its best to put something under the heal to save paint etc. If you are not in a hurry you can spray it turn it a bit and repeat and probably skip the pinch bar. You are fighting carbon on the nozzle so time and wonder spray to break it up or elbow grease to break free.
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Old 11-07-2016, 20:26   #4
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Re: Injector stuck

Hard to beat soak time with PB Blaster.
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Old 16-07-2016, 17:17   #5
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Re: Injector stuck

Last yeat I had the same problem:Stuck injector on my Volvo MD22L. Terrible fight that I finaly won by making an injectior puller: Essentialy a peace of stanchion tubing, a large bolt with a welded screw the size of the injector feed line. The thing attaches to the injector head and a nut pull up the recalcitrant injector. But the real secret was given to me by my marina owner(Jo Treadwell) who sold me a can of Nissan carbon remover. This stuff is fantastic!. It desolve everything in a matter of minutes, in particular all the caked burned carbon deposits around the injector.
Good luck!
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Old 17-07-2016, 16:36   #6
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Re: Injector stuck

I have read you can loosen off the clamp for the injector and then fire/run the engine until the injector pops free, but I haven't needed to do this myself yet
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Old 18-07-2016, 11:51   #7
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Re: Injector stuck

Let say that I have serious reservations about this unusual way to remove a recalcitrant injector. Damages to the engine, engine compartment occur and sailors may occur. I would not dare to try this extreme mesure.
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Old 18-07-2016, 13:17   #8
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Re: Injector stuck

After a good soaking and heat applied from a heat gun, I'd try the hose clamp around the shaft of the slide hammer. Idea being repeated sharp blows, not one big great whack.
Heat can help.


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Old 18-07-2016, 13:19   #9
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Re: Injector stuck

I have heard of blowing one out myself, disconnect the fuel line from the injector so engine won't run and turn her over with the starter and let compression work on it, best if the other injectors are out like you have now. Do have something like a pillow to catch it, even just compression is a good bit of force.


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Old 18-07-2016, 18:35   #10
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Re: Injector stuck

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