Hello Guys!
Recently I rebuilt a Husqvarna 1100CD, due to scored piston. The cylinder is saved and it's in a very good condition. The compression it's great, especially after break in. I changed the seals, I pressure/vacuum tested them with success. Every gasket is new and OEM. I changed the carb diaphragms, neddle etc. I cleaned the carb, I pressure tested it with success, I inspected the settings needles and they are in perfect condition, at least with my experience. I replaced the fuel line and fuel breather and I replaced all the ignition cables and of course the spark plug. The ignition works flawlessly. I tuned it, and the saw was performing great for about 1 and a half tank and after that suddenly started to act weird. While cutting it revs up and down with an 4000 rpm difference. The same happens when I'm revving it with no load. The idle also acts up, suddenly revving like its starving and after a while returns at normal rpm. I tuned it with a Stihl tachometer and I observed the rpm's with it. I've cleand again the carb at a superonic cleaner device, no improvements. Since it's a carb with a governor, I suspected that this is the cause at high rpm. I pluged it and the rpm swing is gone. But in order to stop the idle rpm weird behavior, I need to set the L needle at 3 turns and the H at 1+1/5! The manual says it should be like this: L=1, H=1.2. Before the governor ''delete'' the settings that worked very well were: L=2+3/4, H=1/2. It seemed weird for me but it got the job done, having in my mind that the governor is failling. I may trying to revive a dead carb, but I cannot find a replacement In the EU region. The saw performs well but it still acts up sometimes at idle and since this saw has no brake, I'm worried about my friends safety. I repair those kind of equipment almost 5 years, so I am very familiar with the repair process. Besides a bad carburator what do you think that may is the cause of that problem? Consider tha this saw has scored its piston twice in the past. The cause may be the low quality mix oil the user used over the years.. Or also a bad carb that possibly leand out sometimes? I wanna see your opinion! I'm sorry for the long post.
Thank you in advance!
Recently I rebuilt a Husqvarna 1100CD, due to scored piston. The cylinder is saved and it's in a very good condition. The compression it's great, especially after break in. I changed the seals, I pressure/vacuum tested them with success. Every gasket is new and OEM. I changed the carb diaphragms, neddle etc. I cleaned the carb, I pressure tested it with success, I inspected the settings needles and they are in perfect condition, at least with my experience. I replaced the fuel line and fuel breather and I replaced all the ignition cables and of course the spark plug. The ignition works flawlessly. I tuned it, and the saw was performing great for about 1 and a half tank and after that suddenly started to act weird. While cutting it revs up and down with an 4000 rpm difference. The same happens when I'm revving it with no load. The idle also acts up, suddenly revving like its starving and after a while returns at normal rpm. I tuned it with a Stihl tachometer and I observed the rpm's with it. I've cleand again the carb at a superonic cleaner device, no improvements. Since it's a carb with a governor, I suspected that this is the cause at high rpm. I pluged it and the rpm swing is gone. But in order to stop the idle rpm weird behavior, I need to set the L needle at 3 turns and the H at 1+1/5! The manual says it should be like this: L=1, H=1.2. Before the governor ''delete'' the settings that worked very well were: L=2+3/4, H=1/2. It seemed weird for me but it got the job done, having in my mind that the governor is failling. I may trying to revive a dead carb, but I cannot find a replacement In the EU region. The saw performs well but it still acts up sometimes at idle and since this saw has no brake, I'm worried about my friends safety. I repair those kind of equipment almost 5 years, so I am very familiar with the repair process. Besides a bad carburator what do you think that may is the cause of that problem? Consider tha this saw has scored its piston twice in the past. The cause may be the low quality mix oil the user used over the years.. Or also a bad carb that possibly leand out sometimes? I wanna see your opinion! I'm sorry for the long post.
Thank you in advance!
