No , not the L screw . The screw that controls the opening position of the butterfly . That’s 2 3/8 in from the point it just starts to open the butterfly .Does that mean idle screw 2 3/8 from seated?
I'm about to go try to exchange it. Something has to be wrong with it. I've tried everything.
How bad is my luck. Went to start the new on today and it won't start. Plug doesn't have a spark. I tried grounding just the wire and just the tiniest of Sparks. Tried another new plug. No spark.
Have you noticed an albatross flying around you?How bad is my luck. Went to start the new on today and it won't start. Plug doesn't have a spark. I tried grounding just the wire and just the tiniest of Sparks. Tried another new plug. No spark.
Cliff and Ray, I have just run into this with a CS-590 that has quite a few hours on it. I checked the fuel filter (OK) the fuel line (OK), and the strainer in the carb is clear. It ran yesterday and today it ran OK at WOT but would not idle or accelerate without major hesitation. The plug is dry as a bone as if no fuel is getting to the combustion chamber, even though the fuel line was packed wih fuel and under pressure as I removed the carb.I did have a little trouble with my own 600P recently after purchasing it, may have been some trash in the carb as it would idle a little "quirky" and nearly stall if you left it sit for a minute or two idling after making a cut while you moved limbs and such. Took the carb apart and cleaned it out, cleaned the fuel tank, never had any issues with it since. My 600P is an "oddball" unit, early serial number and the IPL shows a different P/C and coil than is used on the CS-590's or 620's.
I'm getting close to doing some testing between my 590, 600 and 620PW, just waiting for some cooler weather to move it, been WAY too hot here for any of that sort of thing but cooler weather shouldn't be too far off.
As far as removing the limiter caps, modifying them and putting them back in place I started taking a sharp scribe and very gently prying them off the screws instead of engaging them with a sharp drywall screw and pulling them. If you don't mind the extra effort it doesn't leave any evidence they were tampered with and doesn't move them from the original orientation. Not really a big deal but just in case there would be a warranty issue the new owner could take it to a dealer and they would be able to see any evidence of tampering.
I'll also mention here that the CS-590's continue to show up WAY too lean to be ran right out of the box, but the 620's aren't really that far off. Not sure why this happens unless the 620 platform is more efficient and meeting EPA guidelines without being set so lean. The last CS-620PW I set-up happened to be my own, and it was just about spot-on right out of the box. I had to fatten up the "L" screw about 1/8 turn and the "H" screw is pretty much where Echo had it. In contrast the last CS-590 I did wouldn't even run at the factory settings until fully warmed up and heat soaked, and even then it was WAY too lean on both the "L" and "H" screws for my liking. I can see why we see a decent amount of "smoked" P/C's with the CS-590's and seldom (if ever) see a CS-620 show up on Ebay (CL or anywhere else) "for parts" due to lean seize or other issues related to running too lean.......Cliff
That is exactly what I did and reported in Post #57.The limiters need to be removed and tuned good before you run it in wood. Steve
I was going to agree with your first post but wanted cliff a chance to chime inBingo! I cleaned up the carb and then removed the two red plastic limiters using an ice pick, as Cliff described in post #53. After reassembling, I opened up the hi-speed setscrew an additional 1/2 turn and the low-speed an additional full turn. Then I adjusted the idle speed. This CS-590 Timberwolf runs as it is supposed to with good acceleration and power.
I have also run into this with Echo top-handle saws in the past. It seems as running hours are added to the engine, the carbs start leaning out. Not sure why, but the fix is almost always to enrichen the fuel mixture, and if limiters are there, they have to be removed.
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