I installed a new cylinder and piston. Pretty much a straight forward job on this "plastic wonder" New kit in the carb. New fuel line and pulse line.
Fired it up. Adjusted carb. about a 1000 off max. rpm so I could sort of ease in the new stuff. Took it out and cut some 6"-7" diameter DRY Russian Olive. A true gutless machine. I could stop the chain if I put any pressure on the saw at all. Messed around with the carb settings (it does respond to the adjustments) and got it to run under load a little bit better but still not like it should. My old MAC 310 does better. So frustrated I put it on the bench and walked away before I took a hammer to it.
It has an 18" bar with 3/8 pitch chisel that someone has cut the rakers back pretty far on. Not real bad, but more than my gauge says is correct. Oiler is working sufficiently. Personally I would prefer a bit more but the chain is a wee bit oily so I'm sure that is ok.
Next morning, about 25* temp, I tried to start it. Not even a pop. Checked compression. 90psi cold. Removed muffler to inspect cylinder and it looks just as it should. Perfectly smooth and clean. Gave it a shot of gas through the carb and it started first pull. After that, during the day when ever I would try to start it, it fired immediately. Ran it to get it hot and compression is still 90psi. Had some other stuff to do so left it till this morning. Same thing. Wouldn't start until I primed it. Then, first time every time.
Pressure tested. No leaks.
So... My question is, can anyone give me some idea(s) as to what I may have done wrong?
Although this is the first time I have had any major experience with this family of saws, I have built quite a few Stihls over the years, particularly the 024/026/034 series. I worked for the Stihl dealership for years before they sold out and I retired. This is not chainsaw country so these saws (for the Stihl brand) were by far the most common at that time.
In many ways this reminds me of the string trimmer engine issue that Mccullough (sic) had in the late 90s. They shipped a batch of them with engines that had the ports in the wrong place. Although they would run, they had no power. We replaced, probably, a dozen or so upper ends under warranty. If I recall correctly, when we called Pac-Power, the distributor, they said if the compression was 85-90psi and fell within a certain ser. no. range it needed replacement. The only difference is that this saw will respond to carb adjustments which the trimmers would not do.
HELP!!!
Fired it up. Adjusted carb. about a 1000 off max. rpm so I could sort of ease in the new stuff. Took it out and cut some 6"-7" diameter DRY Russian Olive. A true gutless machine. I could stop the chain if I put any pressure on the saw at all. Messed around with the carb settings (it does respond to the adjustments) and got it to run under load a little bit better but still not like it should. My old MAC 310 does better. So frustrated I put it on the bench and walked away before I took a hammer to it.
It has an 18" bar with 3/8 pitch chisel that someone has cut the rakers back pretty far on. Not real bad, but more than my gauge says is correct. Oiler is working sufficiently. Personally I would prefer a bit more but the chain is a wee bit oily so I'm sure that is ok.
Next morning, about 25* temp, I tried to start it. Not even a pop. Checked compression. 90psi cold. Removed muffler to inspect cylinder and it looks just as it should. Perfectly smooth and clean. Gave it a shot of gas through the carb and it started first pull. After that, during the day when ever I would try to start it, it fired immediately. Ran it to get it hot and compression is still 90psi. Had some other stuff to do so left it till this morning. Same thing. Wouldn't start until I primed it. Then, first time every time.
Pressure tested. No leaks.
So... My question is, can anyone give me some idea(s) as to what I may have done wrong?
Although this is the first time I have had any major experience with this family of saws, I have built quite a few Stihls over the years, particularly the 024/026/034 series. I worked for the Stihl dealership for years before they sold out and I retired. This is not chainsaw country so these saws (for the Stihl brand) were by far the most common at that time.
In many ways this reminds me of the string trimmer engine issue that Mccullough (sic) had in the late 90s. They shipped a batch of them with engines that had the ports in the wrong place. Although they would run, they had no power. We replaced, probably, a dozen or so upper ends under warranty. If I recall correctly, when we called Pac-Power, the distributor, they said if the compression was 85-90psi and fell within a certain ser. no. range it needed replacement. The only difference is that this saw will respond to carb adjustments which the trimmers would not do.
HELP!!!
