My 18 Yanmar is inexplicably leaking deisel down the side but I can't tell where. The fittings are tight on the fuel pump, so I don't think that's it. Need some troubleshooting advice. Thanks.
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Paul Akers
Filter Bowl
If you have a filter bowl, is it dripping from there? There is a gasket (o-ring) that could be blown. Or, if it's from a fitting, it could be the copper washer that went bad it you had done any tightening. The copper washers could lose their shape and stop sealing properly. Hope this helps.
If you have a filter bowl, is it dripping from there? There is a gasket (o-ring) that could be blown. Or, if it's from a fitting, it could be the copper washer that went bad it you had done any tightening. The copper washers could lose their shape and stop sealing properly. Hope this helps.
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D. Riha
filter bleed screw
I thought it was the fuel pump but it was the bleed screw on the filter. Replaced the copper washer and it still leaks so I live with it and wipe it down every time I use it.
I thought it was the fuel pump but it was the bleed screw on the filter. Replaced the copper washer and it still leaks so I live with it and wipe it down every time I use it.
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Jim McCue
Injector nozzle?
Did you check that your injector connects are firmly fastened? Is the crank pan oil dip stick in all the way?? The latter would be much dirtier oil residue. Jim McCue
Did you check that your injector connects are firmly fastened? Is the crank pan oil dip stick in all the way?? The latter would be much dirtier oil residue. Jim McCue
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Paul Akers
Bleed Screw
If your bleed screw continues to leak, you can buy a replacement washer for it. It is a nylon washer and cost less that a buck. Not bad to eliminate that type of headache.
If your bleed screw continues to leak, you can buy a replacement washer for it. It is a nylon washer and cost less that a buck. Not bad to eliminate that type of headache.
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mac Lindsay
Leaks
Bill; Had the same problem on my 2gmf. I resolved it by replacing all of the copper washers at the fuel pump, fuel filter at the front of the engine and the copper gasket and nylon gasket on the top of the fuel filter(bleed screw). This worked. Mac
Bill; Had the same problem on my 2gmf. I resolved it by replacing all of the copper washers at the fuel pump, fuel filter at the front of the engine and the copper gasket and nylon gasket on the top of the fuel filter(bleed screw). This worked. Mac
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Claude L.-Auger
Check the 2 machines screws holding the
filter to theside of the block. On my 3 GMF, I replaced the nylon bleed screw washer and it still kept leaking fuel. One of the screws got so loose that it fell out. I replaced the 2, tighten them, replaced the o-ring and the 2 copper washers at the fuel line inlet to the filter and my problem was solved. Cheap fix, but expect a scraped knuckle or two: it's tight. Oops, I almost forgot: do close the valve on the fuel tank as it might leak by gravity when you undo the filter and or the fuel line. good Luck
filter to theside of the block. On my 3 GMF, I replaced the nylon bleed screw washer and it still kept leaking fuel. One of the screws got so loose that it fell out. I replaced the 2, tighten them, replaced the o-ring and the 2 copper washers at the fuel line inlet to the filter and my problem was solved. Cheap fix, but expect a scraped knuckle or two: it's tight. Oops, I almost forgot: do close the valve on the fuel tank as it might leak by gravity when you undo the filter and or the fuel line. good Luck
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Bill O'Donovan
Thanks!
The leak was coming from somewhere around the fuel pump, on the starboard side. I tightened up the screws and fittings, and that did the job--for now. If it recurs, I may just replace the entire pump mechanism. Footnote: fuel had spilled into the nooks and crannies around the engine mounts, so I cleaned those up to avoid degradation of the rubber.
The leak was coming from somewhere around the fuel pump, on the starboard side. I tightened up the screws and fittings, and that did the job--for now. If it recurs, I may just replace the entire pump mechanism. Footnote: fuel had spilled into the nooks and crannies around the engine mounts, so I cleaned those up to avoid degradation of the rubber.
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Dave
Banjo fitting
Check the banjo fittings near the fuel pump. If these have been loosened and then retighten this could be your problem. There are copper washers in the fittings that should be replaced if the fitting is loosened for any reason.
Check the banjo fittings near the fuel pump. If these have been loosened and then retighten this could be your problem. There are copper washers in the fittings that should be replaced if the fitting is loosened for any reason.
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Joan
Another suggestion
Had a pesky fuel leak and tried everything mentioned. Eventually I took a piece of oil absorbing material and wrap it around various areas. Found that the fuel pump itself was the culprit. This needed a special tool to fix, so let the marina repair shop take care of it.
Had a pesky fuel leak and tried everything mentioned. Eventually I took a piece of oil absorbing material and wrap it around various areas. Found that the fuel pump itself was the culprit. This needed a special tool to fix, so let the marina repair shop take care of it.
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