Chainsaw Repair

660 -  Thank you for the detailed reply.  Unfortunately, I have been unable to locate a service manual for the CS-590 - all googling points to it being only available in digital format to dealers/service centers.  I will call my local dealer today and see if it is available for purchase.  I hadn't found another service manual, some service manual supplements, but no straight out service manual.  If you have a link to one, please let me know as I suspect that the pressure/vacuum procedure should be near universal across all 2 strokes.

As for my post, I may have been misleading when I stated "able to pull, but not hold".  When I Pulled the handle of the vac pump in, the vac gauge deflected a slight amount and then went away as quickly as it started.  by pulling vacuum I meant that I could see some deflection of the needle. It didn't hold vacuum for any length of time.

I will dig in deeper with the pressure test as last night I didn't have the time to take the saw all the way down.  Hopefully I can find time between other projects this weekend.

Thanks again for the feedback and guidance. 

Ray