YM 1700 acting up please help

[ed fewlass]

My usually very powerfull YM1700 is lacking in power have changed the oil oil filter fuel filter checked for oil in the water only thing i have not canged or checked is the hyd screen but the hyd seem to be fine it just dont have the power under a load it used to have also some times not all times very light blue smoke comes out the exaust any help would be app dont want to take it to shop to find out is somthing simple thanks Ed

 

[ed fewlass]

My usually very powerfull YM1700 is lacking in power have changed the oil oil filter fuel filter checked for oil in the water only thing i have not canged or checked is the hyd screen but the hyd seem to be fine it just dont have the power under a load it used to have also some times not all times very light blue smoke comes out the exaust any help would be app dont want to take it to shop to find out is somthing simple thanks Ed

forgot to add it sounds just a bit more rattaly but it is hard to tell it was rattaly on low idol before when it had good power I always thought it sounded like it was about to fall apart before on low idol when i yanked the throttel back it seemed to smooth out

 

[rhett]

hi ed,

1. I would ensure the radiator water level is correct before every use. Double check it during long hours of operation.

2. Try using a system cleaner, the process has shown improvements for me. I use Marvel Mystery Oil, a thread with some discussion about it is http://www.tractorbynet.com/forums/yanmar/126645-ym1610d-spittin-oil.html . I add it to both crankcase and fuel, follow label fuel mixing after 1st or 2nd tank. Initial clean out, I choose to mix 2 ounces per gallon. I only add 1/2 quart to crankcase, not a full quart as label suggests.

3. Before above treatment, when engine was hot and ran at idle speed allot I would experience loss of power. Back then, I shut down the tractor, waited 5 minutes and everything ran fine. White smoke did plague me, now I look really hard for it, and do not see it while running, just a few seconds at a cold startup.

Rhett

 

[kenmac]

Blue smoke ?? Rings

 

[ed fewlass]

Blue smoke ?? Rings

I guess thats the reason for lack of power under load the thing starts right up like it always did

 

[rhett]

Blue smoke ?? Rings

hi kenmac, that was my first thoughts also. I was even getting ready for a winter tear down inspection. What the heck, people have sworn by Marvel Mystery Oil for years, what do I have to loose. It does clean out Varnish deposits in the fuel system, carbon build up in the cylinders, sludge in the crankcase and such. On a side note, leaky valve stem seals will cause oil burning, varnished injectors will not properly mist fuel (incomplete burn). There are so many variables involved, I just recommend the trouble shooting begin simple, then progress to the more labor intense procedures as required.

Rhett

 

[kenmac]

hi kenmac, that was my first thoughts also. I was even getting ready for a winter tear down inspection. What the heck, people have sworn by Marvel Mystery Oil for years, what do I have to loose. It does clean out Varnish deposits in the fuel system, carbon build up in the cylinders, sludge in the crankcase and such. On a side note, leaky valve stem seals will cause oil burning, varnished injectors will not properly mist fuel (incomplete burn). There are so many variables involved, I just recommend the trouble shooting begin simple, then progress to the more labor intense procedures as required.

Rhett

I agree, I like to start with the simple things 1 st.. B-4 performing any work on it I would 1 st take a compression check. That still maynot rule out a broken oil ring, valve guides, etc,The injectors I'am not sure about blue smoke . black mabe

 

[ed fewlass]

I agree, I like to start with the simple things 1 st.. B-4 performing any work on it I would 1 st take a compression check. That still maynot rule out a broken oil ring, valve guides, etc,The injectors I'am not sure about blue smoke . black mabe

What other signs would indicate rings I dont have a compression tester thanks for all you guys help Ed

 

[kenmac]

Probably oil out of the exhaust. Valve guides / seals would also do this. So, If the valve guides are good valve stem seals are good. rings would be next. In order. easiest Valve stem seals, harder valve guides, hardest rings . If you have to go with rings I would do a total rebuild on the bottom end

 

[ed fewlass]

Probably oil out of the exhaust. Valve guides / seals would also do this. So, If the valve guides are good valve stem seals are good. rings would be next. In order. easiest Valve stem seals, harder valve guides, hardest rings . If you have to go with rings I would do a total rebuild on the bottom end

would a valve prob make it rattle more also thanks again Ed