YM1500 WILL NOT RUN

[winston]

Wayne, seems you have had some blow by for some time but I'm also wondering with the mention of white smoke if you may have blown your head gasket. Is your over flow bottle at the right level and any evidence of oil in water or water in oil? When it was running did you ever notice any bubbles in the over flow bottle or radiator? I would take it slow and easy, don't order any parts till you have torn down and analyzed some. In those 17 hours you have put on the tractor have you added any oil?

[Arnold]

Did the tractor run OK using 10W40 valvoline? The 20W50 castrol may be causing problems (not sure why but sounds like the only change was the viscosity of the oil). Is there anything else that's changed from when it was running OK and now?

[Norm]

Have you eliminated bad fuel as a problem? If it used to start and run good, and you have only put 17 hours on it, something has come up fairly suddenly. Black smoke could easily be a fuel/injector problem. It's awfully hard to troubleshoot a disassembled engine.

[Guest]

[quote="Norm"]Have you eliminated bad fuel as a problem? If it used to start and run good, and you have only put 17 hours on it, something has come up fairly suddenly. Black smoke could easily be a fuel/injector problem. It's awfully hard to troubleshoot a disassembled engine.[/quote]
There is no oil in the coolant nor water in the oil. I have filled the tank with fresh diesel , took the bowl off and wiped it dry, fuel filter was clean and no evidence of water in the fuel. Reassembled and bled the fuel line @ the injector pump with the full tank of fresh fuel. I let it flow long enough to purge the old fuel out of the line.Not sure on the fuel injector.
I want to say to everyone who has replied a very big THANK YOU for being patient. I am very much a novice at this and your patience is greatly appreciated. What may seem straight forward to you pros is a little intimidating to me. Again thanks to everyone. Keep the suggestions coming.

[waynec]

Replaced the fuel in the tank with fresh fuel. I have purged the fuel line and checked the filter wiped out the bowl and bled the injector pump inlet free of air.Not sure if the injectors are working.

[waynec]

[quote="Arnold"]Did the tractor run OK using 10W40 valvoline? The 20W50 castrol may be causing problems (not sure why but sounds like the only change was the viscosity of the oil). Is there anything else that's changed from when it was running OK and now?[/quote]
It quit running with the Valvoline in it.But it was running fine up until this point.I changed the oil,hydralic fluid, and fuel filter @562 hours right after I purchased it and everything was working fine..

[waynec]

[quote="winston"]Wayne, seems you have had some blow by for some time but I'm also wondering with the mention of white smoke if you may have blown your head gasket. Is your over flow bottle at the right level and any evidence of oil in water or water in oil? When it was running did you ever notice any bubbles in the over flow bottle or radiator? I would take it slow and easy, don't order any parts till you have torn down and analyzed some. In those 17 hours you have put on the tractor have you added any oil?[/quote]
Haven't added any oil and there is no water in the oil nor oil in the coolant. SWould the head gasket make the blow by smoke and oil more noticeable?

[waynec]

[quote="Guest"][quote="Norm"]Have you eliminated bad fuel as a problem? If it used to start and run good, and you have only put 17 hours on it, something has come up fairly suddenly. Black smoke could easily be a fuel/injector problem. It's awfully hard to troubleshoot a disassembled engine.[/quote]
There is no oil in the coolant nor water in the oil. I have filled the tank with fresh diesel , took the bowl off and wiped it dry, fuel filter was clean and no evidence of water in the fuel. Reassembled and bled the fuel line @ the injector pump with the full tank of fresh fuel. I let it flow long enough to purge the old fuel out of the line.Not sure on the fuel injector.
I want to say to everyone who has replied a very big THANK YOU for being patient. I am very much a novice at this and your patience is greatly appreciated. What may seem straight forward to you pros is a little intimidating to me. Again thanks to everyone. Keep the suggestions coming.[/quote]
TYhe above reply was from waynec . It went through as guest. sorry!

[winston]

The mention on an earlier post about white smoke and oil and more of it coming out the vent tube just doesn't sound like anything but blow by to me. It sounds to me your oil level is fine and even tho a good brand of oil made specifically for diesels might be better I don't think your oil change is the problem. I'll encourage you here to keep waiting on some more suggestions as long as they are coming in. These guys are pretty sharp on here. I hope it ends up being minor but I'm stuck on internal right now.

[Arnold]

If it ran OK with the 10w40 oil and had problems with 20w50, I'm thinking it was something that happened at the same time you were changing the oil. The 20w50 oil itself shouldn't cause those symptoms. sometimes it takes awhile to clear the air out of the fuel lines. will it re-start? if it runs, does it sound like it's trying to run smoother or rougher over time?

[Norm]

If it were mine I would rent, buy, beg, borrow, or steal a compression tester, (Aaron has the Yanmar adapter, and probably the whole tester), looking for about 500psi compression. While you have the injector out, re-install it upside down in the fitting, crank the engine over looking for a cone shaped spray pattern, anything else is a bad injector, (or pump). With low compression in just 1 cylinder, if good valves and HG, it's overhaul time.

[wayne c]

If it ran OK with the 10w40 oil and had problems with 20w50, I'm thinking it was something that happened at the same time you were changing the oil. The 20w50 oil itself shouldn't cause those symptoms. sometimes it takes awhile to clear the air out of the fuel lines. will it re-start? if it runs, does it sound like it's trying to run smoother or rougher over time?

I have not been able to get it running again. It turns over easily with the compression release on but when I flip it off I get black smoke out the exhaust and it doesn,t turn over well like it has plenty of compression but will not start.I thought about trying to pull it off to start it but I am affraid that might do further damage.

[wayne c]

If it were mine I would rent, buy, beg, borrow, or steal a compression tester, (Aaron has the Yanmar adapter, and probably the whole tester), looking for about 500psi compression. While you have the injector out, re-install it upside down in the fitting, crank the engine over looking for a cone shaped spray pattern, anything else is a bad injector, (or pump). With low compression in just 1 cylinder, if good valves and HG, it's overhaul time.

When you say Aaron has compression tester do you mean for sale? I may pull and check the injectors as you suggest tomorrow just to see if the are performing as you stated.

[Norm]

If it were mine I would rent, buy, beg, borrow, or steal a compression tester, (Aaron has the Yanmar adapter, and probably the whole tester), looking for about 500psi compression. While you have the injector out, re-install it upside down in the fitting, crank the engine over looking for a cone shaped spray pattern, anything else is a bad injector, (or pump). With low compression in just 1 cylinder, if good valves and HG, it's overhaul time.

When you say Aaron has compression tester do you mean for sale? I may pull and check the injectors as you suggest tomorrow just to see if the are performing as you stated.

He used to sell them, but I don't find them listed now, just the Yanmar adapter. Ask him. If the engine won't turn over fast enough to start, that's a whole 'nuther problem.

[wayne c]

how hard is it to replace the rings and sleeves in the motor? any specialty tools required??