Jiles

I am a big fan of Dolmar/Makita saws I work on many brands of chainsaws and have for many years. The Makita DCS 520 is basically a newer version of the Dolmar 111---115 and 540. As was stated --to some people, the 115 closed port is the most desirable. My personal, go to saw, is a Dolmar 115 and just sold a Makits 540. With the many D/M saws I have built, I have never ported one but just do a muffler mod and tune to four stroke out of cut. This link is probably not what you are looking for but informative. https://chainsawrepair.createaforum.com/dolmar/free-porting-piston/ Somewhere on this computer, I have porting info for your saw, that will interest you. When found, I will post. Hope this helps.

No problem--I totally understand your concern. Really didn't realize you are in UK because I don't visit here a lot. I guess it would not be feasible to call America. I will just say that I have worked on small engines for over 50 years and in the last three have decided the Stihl 192t and the 020t/200t sell the best and bring a higher price, I no longer work with the replacement 193T and the 201T because of the many changes made and Stihl's screw-up in their design. That is the main reason the 020T and 200T are in great demand and bring crazy prices. I have worked on a lot of early model 201T that were THROWN out of trees because of running problems, advanced the ignition, after changing the coil, modified the carburetor and muffler and they ran as good or better then the 200T. They should because they are of the "closed port design" as opposed the 200T being "open port". I am sure Stihl has corrected all their problems today. I would guess I have flopped over fifty of these early Stihls. I know them like the back of my hand and I get an average of two calls a week from friends with problems. Just gives me a good feeling to know I have helped someone in need. I do not type very well so my wife typed this message for me.

I belong to several forums and PM is easy and common. Don't quite understand the attitude against a Private Message on this site? I am 72 years old and it is difficult for me to type, but I take joy in helping anyone in need. I was simply going to ask you for a phone number or give you mine for private discussion. I converse with many new friend I have made on forums over the years, but I never post my phone number on an open forum. Sometime you have to just move on.

I have rebuilt and sold MANY 200T and know them well. Enough to know I don't want to type all the suggestions. Just disregard my request for Private Message.

Can you send me a private message?

Send me a PM --I may have a suggestion

I have no idea what a course would involve. I know there were courses many years ago but I suspect today, one could be found and would be expensive. I have no idea what age you are, but I started repair/rebuild when I was about 12 years old. Over my 50 years of working on small engines, I have never had any training, and I have rebuilt many engines from a tiny leaf blower to diesel engines. I am in agreement with the suggestion you just try rebuilding a few. If you run into a problem--Google to the rescue.

I try to stay away from doing business with family and friends. However, when I do, I always have a clear understand! In your situation, I would agree to give asking price if repair is within reason. If not, price would be adjusted accordingly after inspection. Have him agree that you can do a compression check and if it is in the 150# range, decide on price. On most 2 stroke engines, I pull the muffler and take a look at piston/cylinder but very difficult to tell much with these saws. I have rebuilt an sold many 200T and, IMHO they are the best for me to deal with. These saws have a few problems, such as: 1)--Muffler mounting screws loosening up and allowing escaping exhaust to damage bottom of saw-- if not corrected. 2)--Chinese carburetors are notorious for problems but can sometimes be repaired/modified. 3)--Rubber intake boot and impulse line. 4)-- Exhaust damaged clutch side cover. I am in United States and most I sell a really nice 200t for is around $450.00 Like I said, I have sold MANY but now have four really nice ones for sale and sales have slowed down, for some reason.

All metering of gasoline, with a non adjustable carb, is accomplished with size of jets inside the carb. I am in disagreement with adjusting the float level for more (richer) mixture. What is puzzling about your particular situation is that your symptoms suggest an air leak. However, your spark plug suggest a rich mixture. Spark plug color, of the porcelain surrounding the center electrode, should be light brown, like coffee with lots of cream, or light gray--NOT ANY SHADE OF WHITE.

I have build Many 200T I can try and send you a Stihl MS200T service manual, if interested. Just send me a note in Private message.

Thanks--You are correct---sorry we couldn't work something out.

I have a good assembled crank and cases. Where are you located?

Where are you located?

With virtually anything that comes out of China, It is a copy and the cost is less because of cheaper building material. That's one way they decrease cost, along with using child labor! I would much rather buy a well worn used part, made in virtually any other country, then to buy Made in China.

Not quite !