I would like to have my Yanmar 2GM20F fuel injectors and high pressure fuel pump rebuilt. Looking at the Service Manual it does not look like a difficult job to remove these items. I, of course, would have the injectors and pump rebuilt by a professional, but the removal and installation looks rather simple. Has anyone attempted the job; and if so did they encounter any problems? Your advice would be appreciated. Bill
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On my 3GM30F the rack has to be positioned
properly. That is done from the sheet metal covered access port just behind the pump. Can't recall for sure, just what to tell you. It has been 3 years, but your right, it's not hard to do. Let us know who rebuilds your pump. I was not happy with the work on mine.
properly. That is done from the sheet metal covered access port just behind the pump. Can't recall for sure, just what to tell you. It has been 3 years, but your right, it's not hard to do. Let us know who rebuilds your pump. I was not happy with the work on mine.
Bill, How do you know they need to be
rebuilt? I also have a 2GM20F. I've had the boat a few months and I'm learning more
rebuilt? I also have a 2GM20F. I've had the boat a few months and I'm learning more
Your going to have to remove the fresh water
pump because the high pressure fuel pump will not come out without doing this, Your going to have real fun getting the high pressure pump bled when you reinstall,I mean REAL FUN!!! also you will have to make sure that the fuel rack is lighned up with the fuel fork. (not real hard, just remember this) as the book says nothing of this step. It is very hard to get the motor running after removing the high pressure fuel pump!!!!!! My suggestion is to pull JUST the injectors and have them cleaned/tested and install them and go on. Been here done this!!!!! on a 2gm20f
pump because the high pressure fuel pump will not come out without doing this, Your going to have real fun getting the high pressure pump bled when you reinstall,I mean REAL FUN!!! also you will have to make sure that the fuel rack is lighned up with the fuel fork. (not real hard, just remember this) as the book says nothing of this step. It is very hard to get the motor running after removing the high pressure fuel pump!!!!!! My suggestion is to pull JUST the injectors and have them cleaned/tested and install them and go on. Been here done this!!!!! on a 2gm20f
Injector removal
My injectors (2GM20F) have been in and out so many times in the last few weeks I've lost count.. You'll probably want to take the combustion chambers out too. The whole lot may be so carboned up they might not shift. The first time, I had to take off the head and "using a suitable drift", tap the whole lot out from the cylinder side. Once they were free, each time I replaced them I used a copper-slip paste to ease the job next time around. It can still be tricky to get them out - one trick is to losen the nuts holding the assy in by 1/8" and turn the engine over first with decompressors and then if no joy, without. I haven't removed my pump so can't help you there. Good luck. What makes you want to rebuild them?
My injectors (2GM20F) have been in and out so many times in the last few weeks I've lost count.. You'll probably want to take the combustion chambers out too. The whole lot may be so carboned up they might not shift. The first time, I had to take off the head and "using a suitable drift", tap the whole lot out from the cylinder side. Once they were free, each time I replaced them I used a copper-slip paste to ease the job next time around. It can still be tricky to get them out - one trick is to losen the nuts holding the assy in by 1/8" and turn the engine over first with decompressors and then if no joy, without. I haven't removed my pump so can't help you there. Good luck. What makes you want to rebuild them?
Injectors and High Pressure pump
Unfortunately, I just had the high pressure pump rebuilt after I first replaced the injectors mysely on my 2GM20F. The situation started with getting some gasket sealer into the fuel system while cleaning off the banjo fittings at the engine filter. Yeah, I know there should not have been any gasket sealer used on the fuel system components, non-the-less, the gasket sealer or some other contamination found it's way to and through the high pressure pump and to the injectors. It was relatively easy to replace the injectors, but the high pressure pump rebuild and calibration is a job only for the pro's, and it's expensive --$500 for the pump alone. Assuming you can get the engine running; you should bleed each injector separately. Loosening the fuel connection on a faulty injector will have no effect on the engine running because it will continue running on the good injector, but loosening the fuel fitting on a good injector will kill the engine. Now, if you switch the injectors and there is no change in which cylinder continues to run, the high pressure pump is faulty. It would be worthwhile at that point to have the high pressure pump rebuilt or replaced and the injectors tested by an injection shop. New injectors cost about $100 each for the 2GM20F. Go online to www.yanmarhelp.com and/or check out Torereson Marine's site if you want to get more specific input.
Unfortunately, I just had the high pressure pump rebuilt after I first replaced the injectors mysely on my 2GM20F. The situation started with getting some gasket sealer into the fuel system while cleaning off the banjo fittings at the engine filter. Yeah, I know there should not have been any gasket sealer used on the fuel system components, non-the-less, the gasket sealer or some other contamination found it's way to and through the high pressure pump and to the injectors. It was relatively easy to replace the injectors, but the high pressure pump rebuild and calibration is a job only for the pro's, and it's expensive --$500 for the pump alone. Assuming you can get the engine running; you should bleed each injector separately. Loosening the fuel connection on a faulty injector will have no effect on the engine running because it will continue running on the good injector, but loosening the fuel fitting on a good injector will kill the engine. Now, if you switch the injectors and there is no change in which cylinder continues to run, the high pressure pump is faulty. It would be worthwhile at that point to have the high pressure pump rebuilt or replaced and the injectors tested by an injection shop. New injectors cost about $100 each for the 2GM20F. Go online to www.yanmarhelp.com and/or check out Torereson Marine's site if you want to get more specific input.
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