(DIR) Return Create A Forum - Home --------------------------------------------------------- Chainsaw Repair (HTM) https://chainsawrepair.createaforum.com --------------------------------------------------------- ***************************************************** (DIR) Return to: Homelite ***************************************************** #Post#: 38024-------------------------------------------------- 707D compression/pressure By: dynodave Date: April 3, 2014, 6:05 pm --------------------------------------------------------- Any one know what is cranking pressure for these old saws? My 707D blew just shy of 145psi. It has a new piston and rings running in a scratched, but not severely scored cylinder. It has now run Idled and throttled up for a total of about 10 minutes. I have to send off my dead new tinytach and hope to get a warranty replacement, so I can set up the governor to 6K. Then I can cut wood and get it tuned to break from 4 stroke into 2 stroke...yeah baby... pix of the patient here... (HTM) http://atlanticgreen.com/images/707da1t.jpg (HTM) http://atlanticgreen.com/images/707da1t.jpg #Post#: 38063-------------------------------------------------- Re: 707D compression/pressure By: Eccentric Date: April 4, 2014, 5:00 pm --------------------------------------------------------- The Homelite Service Manual tells us to refresh the engine when compression falls below 100 psi. You're doing very well to have 145 psi with a scratched cylinder. #Post#: 38066-------------------------------------------------- Re: 707D compression/pressure By: dynodave Date: April 4, 2014, 7:15 pm --------------------------------------------------------- Thanks Aaron I got curious and tried a pressure test on my 7-19C (82cc) also, and got just shy of 165psi. Both saws were converted to new std (no skip) 404 chain. The 7-19C is a 20" hard nose bar and the 707D is a new 30"carlton bar. I've got a 15' piece of red oak 28" at the big end for testing cookies. I need the 707 running and cutting good for a maple at another property that is much bigger.... ;D *****************************************************