Hey:

First, answering the last two post:

"Flypaper 2" is right, I first bought a brand new US engine and it ran well ( perfect) of course, but I think most of us like the conversion engines not because the bucks we could save, that are quite few at all if we consider a electronic ignition in the menu. We like the conversion because we enjoy it as a challenge.

Is the same between an ARF or kit plane. happens the same with the people who would like to buy a cheap ARF and only see the guys who talk about how difficult is to built a kit or a scartch built. Well, the guys who built from a kit or scratch do it because they love that activity and for sure they learn a lot more about construction, materials resistances and designing.

For example, Many in this forum want to built their own ignition, and that is because is a personal challenge, not to save money. We, the converters, will know and understand the working of the gas engines in our models much better than those who just buy one for R/c and bolted in the plane.

I want to state that one or another are different options to enjoy the hobby, and none is better than the other. Some guys do not have the time, the hability or simply do not enjoy converting a engine, while others would like it as a paralell hobby to modeling.

The thing is that in fact we save some money with the conversion and in some cases the converted engine will run as well as a manufactured R/c one, but from time to time you find a engine too weared or abused, too old, etc. and then we post something here to get some help. I´m sure that for each thread asking something about a converted engine there are dozens of happy modelers with their conversions running just fine, that is why there are every day more and more guys manufacturing pieces for conversion, let say jag engines, C&H ignitions, weed wacker, bennet mufflers, and so many others.

I would like that everyone here support one to others, attitudes like the desertpig do not acomplish the objetives of the forum. I respect his option about the way of doing R/C, and appreciate his rought advice, but some of us enjoy bolting , timing and reassambling engines as well as flying and post here looking for some support instead of discouraging.
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back to our matters:

I know this brown stain means that the ring does not seals correctly that portion of the cylinder , I think ( trying to remember) it is just were the ring meets the positioning pin, and since it is the original one of course have a lot of leak. May be I should inspect my own engines, but they do not have that problem and run great.

Until now my friend hasn´t told me if he did some more break in to the engine or if he tested a different carb. let´s wait to see what happens.

Tato Lazo.