Well, I think it is safe to now bring this thread up to date & possibly close it out. If you have been seeing my posts on the "562 hesitation" thread, you are completely up to date. If not, here is the latest info on mine.
The bog problem returned, though not as bad as before, so back to the dealer I went. There was also some pressurization of the fuel tank. After calling Husqvqrna, he called me & said that they were sending out a new fuel tank & vent AND an EL48 carb. When it was done, he did a test run with no problems, but it was a short run. I picked it up &, over a 3 or 4 week period, pretty much gave a thorough testing & evaluation. After being satisfied that I had the new carb calibrated, it was run in 24in cottonwood on a 50 degree day. About 1.5 tanks were used, & no problems were noted. It started in 3 pulls cold, fast idled normally, slow idled normally, & had no hesitation when throttled up whether it had just been started or had made 1 or 2 or 3 or more full length cuts & was at maximum operating temp. It started in 1 pull when warm or hot, every time.
The next time I used it, the outdoor temp was in the low-mid 30s, & I had the gate open. This time the wood was red pine & dry honey locust. About 1 full tank was run through it with the same results as above as far as starting, idling, throttling up, & restarting were concerned. I was particularly careful to warm it up fully & test it for hesitation after allowing it to idle for intervals of 2sec., 10sec., & 30+sec. It responded perfectly to the throttle!
The third time I tested it was back at the dealership. The gate was now closed, & the temp was around 40, if I remember correctly. The test wood was ash, & the results were exactly the same as above. I also had the dealer run it, & it put a big grin on his face!
Before I considered the testing done, I wanted to give it a "colder weather" run. Back to the dealership we went on a day when the outside temp was 16 degrees & the wind was whistling along at 20-30mph. They now had some 36in maple for cutting. This time I left the gate closed. It started in 3 pulls when cold. The fast idle was slower than it had been at warmer temps, & this was considered to be normal. After a proper warm up, it fast idled normally (chain turning) when re-started warm with it set on fast idle. This was done for test purposes & was not needed for the warm re-start. When warm, it starts with 1 pull in the normal run position. Having the gate closed might have resulted in a slightly longer warm up, but it had no effect at all on the performance. After burying the 24in bar for a couple of "long cuts" (they really didn't take very long), the throttling up from idle tests were repeated at the same intervals as above, & the results were exactly the same.
So far, it seems like the EL48 is the magic bullet!! I was confident enough that my saw was finally a winner, I went ahead & ordered a Tsumura 24in bar to replace the original which was a Husqvarna. It made a BIG difference in balance! The Husky bar weighs 2 3/4lbs., & the Tsumura L&T weighs 2lbs. It now balances almost as well with the 24in as it does with the 20in Techlite!!
