I was at the boat today and found some evidense of diesel in the small bilge under the engine. The motor is a Yanmar YSM 12. Upon further investigation i found the leak on the line that crosses the front of the engine. My question is can i just pull that line off and replace it, and thats it or does it require mor steps.( Bleedeing of the system). If so does anyone have info on this. Pray for Wind, Lugeman
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tighten all the bolts on the fuel system
Also tighten the fuel filter, the bleed screws and the fuel pump fittings. Then you can find the source of the leak. It could be a crush washer, the o ring on the fuel filter or just a loose fitting. Good luck
Also tighten the fuel filter, the bleed screws and the fuel pump fittings. Then you can find the source of the leak. It could be a crush washer, the o ring on the fuel filter or just a loose fitting. Good luck
banjo washers are not really resealable.
Lugeman: If you have loosened and retightened any of the banjo washers, there is a good chance that this could cause a leak. There is also a chance that the hose/tube has a crack/leak. You are correct in removing and replacing the line, but you may want to look further. There is no guarantee that it is the line. It could be somewhere else and the fuel is just following the line.
Lugeman: If you have loosened and retightened any of the banjo washers, there is a good chance that this could cause a leak. There is also a chance that the hose/tube has a crack/leak. You are correct in removing and replacing the line, but you may want to look further. There is no guarantee that it is the line. It could be somewhere else and the fuel is just following the line.
The answer to your question
If your question is what do I do after replacing the fuel line that runs across the YSM- the answer is you must open the bleed screw (small cross hatched screw on engine face) and pump via the lever on the fuel filter. At this time of the season, you might as well change both filters, and check the balance of your fuel line for leaks. If it is wet to the touch,or has cracks, you are long past replacement. Good luck- If you have problems- there is a good diesel boook available from Yammar dealers or come back to the site. Ian s/v Meant to Be 79 Hunter 30
If your question is what do I do after replacing the fuel line that runs across the YSM- the answer is you must open the bleed screw (small cross hatched screw on engine face) and pump via the lever on the fuel filter. At this time of the season, you might as well change both filters, and check the balance of your fuel line for leaks. If it is wet to the touch,or has cracks, you are long past replacement. Good luck- If you have problems- there is a good diesel boook available from Yammar dealers or come back to the site. Ian s/v Meant to Be 79 Hunter 30
Whoa...
Be careful tightening all those screws. Yanmar inexplicably made everything out of aluminum, so it's easy to strip the threads. (Perhaps this is their revenge for losing the war.) When you replace the crush washers, I recommend the plastic version. Longer-lasting and just as if not more effective than copper. Once the leak stops, don't mess with it. To test for leaks at the fuel pump (which is the most likely source), stick a cotton ball there for future observation.
Be careful tightening all those screws. Yanmar inexplicably made everything out of aluminum, so it's easy to strip the threads. (Perhaps this is their revenge for losing the war.) When you replace the crush washers, I recommend the plastic version. Longer-lasting and just as if not more effective than copper. Once the leak stops, don't mess with it. To test for leaks at the fuel pump (which is the most likely source), stick a cotton ball there for future observation.
good info
Thanks for all the tips.Torrensens said the plastic crush washers are best. Heading back to the boat tommarow. More later. Pray for Wind, Lugeman
Thanks for all the tips.Torrensens said the plastic crush washers are best. Heading back to the boat tommarow. More later. Pray for Wind, Lugeman
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