Can anyone shed light on the problem we are having with our 2GM15? We have a '79 h33 with this Yanmar motor and after replacing the fuel filter, running a return fuel line back to the tank, replacing the injectors and other maintenance it still runs perfectly...for about 15 minutes then dies. In order to start it again we need to bleed the fuel lines and an excessive amount of air does bleed out. Any suggestions or like problem sharing would be helpful. Thanks.
- Status
- Not open for further replies.
D
David
Did you
replace your fuel line? The hose may have a small air leak if it is old. Is that a replacement engine? I thought the 79 33 came with a 2QM.
replace your fuel line? The hose may have a small air leak if it is old. Is that a replacement engine? I thought the 79 33 came with a 2QM.
J
J. Galbraith
Pick up screen
have your removed the screen in the fuel pick-up tube. I you have any air leaks in the fuel supply hose and the pick-up tube screen is clogged you get air to the engine. Beleve me, it happens. John S/V Dinnae-Ken II
have your removed the screen in the fuel pick-up tube. I you have any air leaks in the fuel supply hose and the pick-up tube screen is clogged you get air to the engine. Beleve me, it happens. John S/V Dinnae-Ken II
Yanmar Filter Bowl.
Both of the previous are good ideas. I would also check the Yanmar filter bowl to make sure that you are not getting a leak there. If you are running for 15 min. I assume that this is at the dock. That is probably all you would use if you are idling at the dock. If you find that you are OK at the Yanmar filter I would start going back towards the tank and look for a leak. If you change the hose and check the pickup you will have basically eliminated any hose problems. You should also check the primary filter too. Remember you are probably sucking air, so it may not be obvious!
Both of the previous are good ideas. I would also check the Yanmar filter bowl to make sure that you are not getting a leak there. If you are running for 15 min. I assume that this is at the dock. That is probably all you would use if you are idling at the dock. If you find that you are OK at the Yanmar filter I would start going back towards the tank and look for a leak. If you change the hose and check the pickup you will have basically eliminated any hose problems. You should also check the primary filter too. Remember you are probably sucking air, so it may not be obvious!
J
joe phibbs
check fuel tank air hose
If all else fails, check to see that the hose from top of fuel tank to scallop on hull is not clogged. If it is not functioning, you could have the symptom you refer to (engine running out of fuel). Blow thru the fuel filler cap and listen for air to escape. Joe
If all else fails, check to see that the hose from top of fuel tank to scallop on hull is not clogged. If it is not functioning, you could have the symptom you refer to (engine running out of fuel). Blow thru the fuel filler cap and listen for air to escape. Joe
M
Mike
Thanks and David you're right...
it is a 2QM. Sorry about that. All your suggestions are great but we've run new lines, installed a new primary filter, changed the filter in the bowl on the filter on the engine, new oil filter, etc., etc. The only thing we haven't changed is the fuel pump. That's next. After that everything possible seems to have been done. Anything else? Thanks again.
it is a 2QM. Sorry about that. All your suggestions are great but we've run new lines, installed a new primary filter, changed the filter in the bowl on the filter on the engine, new oil filter, etc., etc. The only thing we haven't changed is the fuel pump. That's next. After that everything possible seems to have been done. Anything else? Thanks again.
Mike:
Mike: Just because you have changed everything out does not mean that you do not have some type of air leak in the system. I also like the idea of checking your vent hose.
Mike: Just because you have changed everything out does not mean that you do not have some type of air leak in the system. I also like the idea of checking your vent hose.
A
Andy
Injector washers
When you replaced the injectors, did you replace the copper washers? If you used the old ones you may have a leak around the injectors. Also, the steel fuel lines can get pin-hole leaks if twist wrong during the replacement. Suggestion: with the engine running, hold a clean paper towel over crucial areas and see if fuel appears on the towel. The leak may be so fine that it is not visible to the naked eye, but it will accumulate on the towel. Good luck
When you replaced the injectors, did you replace the copper washers? If you used the old ones you may have a leak around the injectors. Also, the steel fuel lines can get pin-hole leaks if twist wrong during the replacement. Suggestion: with the engine running, hold a clean paper towel over crucial areas and see if fuel appears on the towel. The leak may be so fine that it is not visible to the naked eye, but it will accumulate on the towel. Good luck
- Status
- Not open for further replies.