(DIR) Return Create A Forum - Home --------------------------------------------------------- Chainsaw Repair (HTM) https://chainsawrepair.createaforum.com --------------------------------------------------------- ***************************************************** (DIR) Return to: Homelite ***************************************************** #Post#: 71142-------------------------------------------------- Homelite ut10540 By: mvencel Date: April 14, 2016, 10:51 pm --------------------------------------------------------- Chainsaw starts and runs fine. When the bar is pointed straight up the motor runs at full speed. #Post#: 71150-------------------------------------------------- Re: Homelite ut10540 By: Chainsawrepair Date: April 15, 2016, 12:10 pm --------------------------------------------------------- [quote author=mvencel link=topic=5855.msg71142#msg71142 date=1460692311] Chainsaw starts and runs fine. When the bar is pointed straight up the motor runs at full speed. [/quote] I had one do this long ago and it turned out to be a torn intake boot. I dont know what your saw has though. Whats it do when you roll it side to side running? #Post#: 71151-------------------------------------------------- Re: Homelite ut10540 By: Chainsawrepair Date: April 15, 2016, 12:16 pm --------------------------------------------------------- Looks like a intake block style. Check for loose carb etc. Check for anything loose. Bottom pan bolts etc. Throttle being pulled by worn or broke av etc. homelite ut10540 35cc 38cc IPL (HTM) https://gardnerinc.com/manuals/pdf/ipl/TTI/Homelite/chain%20saws/10918_339/UT10540_60_80_339_r_02.pdf HOMELITE UT10540, UT10542 / 14 in. 35cc CHAIN SAW UT10560, UT10562 / 16 in. 38cc CHAIN SAW UT10580, UT10582 & UT10918 / 18 in. 42cc CHAIN SAW REPAIR SHEET *****************************************************