AHHHH The power of BEER Torn It down ( not a hard job) The piston is scored but the cyl is in awsome shape 1 piston and rings couple of gaskets and new fuel lines I should be back in business
Agree. Seems pretty bad...... May not be. But...........Just a word of caution.... looks like some aluminum has left the piston. Are you sure the cylinder is okay as is? I just hate to see you throw a piston in there and have it scored again. Can you get some pictures of the cylinder?
Do you see shiny aluminum transfer on the cylinder wall? If so, you have to get it cleaned off.
Well, all will be set right again. With a new p&rings that saw should run fine. Set the carb a tad rich and check/replace the impusle line while you are in there. If I recall right, the impulse line is a long line to the carb. When I replaced my 020AV impulse line, the Stihl dealer did not have that part in stock. So I used a length of clear plastic tubing of the same diameter.
The impulse line goes from the carb to the cylinder. It allows the carb pump diaphragm to recognize changes in the cylinder pressure and correspondingly, pump fuel. Some saws due not use a line, instead they have passages through the intake block setup.
Do you have the IPL (Internal Parts List) for the saw? If not I may be able to hunt it down for you.
I'll let the guru's On here check the cyl for me . Should I hit it with light sand paper and oil before re-assembly
Yah, no sanding, honing or cross hatching a Nikasil lined cylinder. Muratic (swimming pool) acid only... oil is good, I use 2 stroke oil during assebly of 2-stroke P&Cs. On 4-strokes I use moly assembly lube.
Most all Stihl saws (including the older 020, 009, 011 models) have impulse lines to drive the fule pump in the carbs. The line runs from a stub at the cylinder base to a stub on the carb, or a stub on the carb mount plate that has a hole to the carb through the gasket. On the early model 020AV the line was about 8 inches long and ran all though the center of the saw. They are critical to the saw working properly.
Sorry, I do not have an IPL for the 009, but it seems that on Stihl 009 model saws with Walbro WA carbs, the impulse pressure/vacuum is fed thru the engine case to a mounting flange on the carb. So on some model 009 saws, there is no impulse line to mess with. Which is a good thing.
No need for an acid wash on that cylinder. That looks real clean. Fit in the new piston and rings, and fire it up. Make sure you tune the carb so you do not re-fry that piston running it too lean. With a clean plug, clean air filter, clean exhaust screen and fresh gas, set the H and L and idle. Most of the 009 carbs have H & L setting screws, but not all of them have H screws (supposedly some have fixed H jets). I do not have the RPM numbers for the carb settings, as I do not have the manual for that saw either.
Stihlhead, the OP's saw is an 011.
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