Oil & Fuel YM1610D spittin oil

[rhett]

hi roxynoodle,

Marvel Mystery Oil can be purchased at just about any auto supply, hardware store and the like. It has been around since 1923. Instead of me trying to explain the product here, they have a website = ::Marvel Mystery Oil:: also a Google search will yield more information about it.

Would I recommend it urgh? NO/YES, because it does clean oil sludge, carbon deposits, gum ups, etc... older motors could possibly be using these buildups as void fillers, to many variables of unseen motor conditions involved to give a 100% yes answer.

I think I did kinda mention I'm trying MMO because it might help my situation. The results are not immediate and take time for me to even see if I benefit.

My opinion is MMO is not a "Snake Oil Additive" that claims to work miracles, it is simply a cleaning additive. Try at your own risk!

Rhett

 

[E_Sanborn]

Although this isue is over a month old and has died a natural death, I wanted to close out the story and bring everything full circle.

I took the YM-1610D in to the dealer, RCO Tractor in Austin, Texas (I live ~50 miles away) They diagnoised the issue as leaking Valve Stem Seals, and they addressed the problem.There were some strong feelings at various points of the discussions in the past few weeks, but the important thing, and the part that will stay with me, is that the people at RCO Tractors stand behind their product with service, and an attitude that they will do what it takes to make the customer happy.

So I am pleased to be able to share my high opinion of RCO Tractor, and I can tell you that I would unresevedly recommend them to anyone.

 

[dougmac]

The black oily stuff you see coming from the exhaust is probably a mixture of carbon and unburned fuel. I am a trainer that trains diesel mechanics. On other engines we call this "wet stacking". Extended idling or running below operating temperature can cause it. A leaky injector or an engine that is getting tired will also "wet stack".

My 2200 does it too. Because mine does not smoke and starts easily, I am fairly confident the fuel system and engine are in good shape. In a standard diesel a stuck open thermostat will cause the engine to run too cool and can result in "wet stacking". When I first got the tractor, I was certain that the tractor needed a thermostat to solve the low temperature and "wet stacking" problem. I couldn't find a thermostat on the engine or in a parts book. I now understand that some Yanmar tractors like mine do not have a thermostat. This explains my tractor's low operating temperature.

My engine runs at pretty low temperature. I do quite a bit of idling and most of the time I don't use it very hard or for long enough to get it fully warmed up. Based on what I know about diesel engines, I have come to the conclusion that some "wet stacking" would be normal under these operating conditions.

Unburned fuel can in extreme cases wash down the cylinders and contribute to cylinder wear. I would conclude, if it wasn't excessive the impact would be minimal. The unburned fuel also finds its way into the crankcase and can cause excessive soot loading of the oil. This can also contribute to ring and cylinder wear. So changing the oil often is important.

To some degree you will probably have to live with it. My recommendations to minimize the impact would be to:

- Avoid idling the engine as much as possible.
- As much as practical, work the engine enough bring the temperature up.
- Change the oil and filter often.

Good Luck,
Doug