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Originally Posted by Merlyn
Most interesting Andrew but you won't find the answer to my question in the workshop manual, you will only find it by experiences caused by working on this type of engine.
It was, as I said a very common occurrence caused solely by not decoking the engine.
The excessive backpressure, as shown by the gauge on the control panel clearly showed the fault.
The bar magnet was used to get the broken part of the engine out, when ground correctly this part, being made of carbon steel would make an excellent addition to your tool box.
A crosscut chisel f.o.c.
That crank, sure it's not a wrist watch crank?
Think about the back pressure load on parts caused by excessive carbon build up on two strokes.
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Yes Merlyn, you do not even know how much I appreciate your remarks. because I know that I will not find them in the workshop manual ... It's good that you want to work with me with your experience. As you know, I do not have too much, because I had to find these codes in music .. That's why your help is great .. I now add my cody and maybe something good will be ...
You have noticed the excessive accumulation of carbon. Now that we have a new type of engine Feliks Commer, where there is no classic crankshaft, only pins with a diameter of 30 mm, we can approach the issue in a different way, as it was so far. These small plates do not need such lubrication as large crankshaft bearings, besides they do not even turn round, and do semi-turn .., so the lubrication can be a little smaller .. I do not know if you remember that two-stroke engines for motorcycles, are lubricated only with oil in the fuel and in a ratio of 1: 50. And these engines, completely protruding .. so I thought that my Felix Commer can be lubricated with normal diesel fuel, also with the addition of this oil, let's also say 1; 50 as we will take into account that diesel fuel already has good lubrication in the sona .. Imone would be poured into the engine instead of lubricating oil. Well, when 10 liters of such fuel are needed for lubrication, the amount of oil added would be 0.2 liters .. No and I think that this quantity would not plug the windows, because the rest would be the same as the main fuel, it would be fired without coke .. And I think that this should solve the problem of this too nagar. Simply a new lubricant oil felix, i.e. diesel fuel plus 1:50 oil for two strokes ... .. poured into the engine, instead of lubricating oil ..
It would have such advantages that in the winter it would not be too dense, and in the summer too sparse ... ... and this price is not too high ..
So even with a large amount of "oil" you would not have to worry about ... because also coke would not be created ... because, from burning fuel, it does not arise ...
I just do not know what oil companies are doing ...
here, one bottle is enough to make 50 liters of "feliks oil"
https://www.mobil.com/English-PL/Pas...il-1-Racing-2T
And here the drift part of the watch, which I personally will do on an ordinary lathe. The material to do this crankshaft weighed 80 KG and the shaft lasts 4 KG. It lasted for a month ...
You know how you see the problems of crankshaft production, and that's why I know it's not a simple thing ...
Here are a few examples, however, that the crankshaft is not necessarily a successful construction .. and despite its thickness, sometimes it ends ... And I will ask if ever seen such a broken clutch shaft, despite the fact that it is much thinner than the crank ..
http://new4stroke.com/rootes%20diese...0-%20small.pdf
Andrew