As much as I agree with you guys about how to get a husky autotune saw to run/calibrate correctly....... I don't think it will make any difference with a vapor lock. Try some truefuel and see if you are still having the problem. Also your dealer should be able to tell you what your stats of the saw are.... Like carb temp betting it is a higher then normal number. My brother has a 555 and has never had a hot restart issue.
If you read this document
http://s7d9.scene7.com/is/content/GenuinePartsCompany/2043319pdf
It is the msds for 50:1 trufuel.
Section 9 states its properties including boiling point, which is rather low. Lower than pump gas unless I am not understanding something.
This IMO would be a worse choice to vapor lock than regular gas, again if im reading it correctly. I have to assume that 34C boiling point range to 190C is based on atmospheric pressure to some other pressure. But it doesnt say...
I have a 562xp 2020 model. Mine will absolutely not hot start if turned off on a hot day after some high rpm bucking if left for more than 3-6 minutes or so.
Purge bulb does not function and everything that everyone with this issue reports is what I have experienced.
there are some tricks that I want to try in a somewhat controlled experiment that require little work to see where exactly this hot start issue starts from
1. run the saw hard on a hot day with no wind, recreate the hot start issue by waiting 5-10 minutes. Restarts will always be done with decomp out or ‘not engaged’ This is the control
the variables are
- Shut off the saw with the choke only, repeat the control
-shut off the saw with the kill switch, remove the top cover and leave off, repeat the control
-install a vacuum cap and plug for the purge line, leaving them in place and repeat the control.
im gonna try it this weekend.
*edit*
In case someone is wondering about the choke variable, I have read someone doing this to correct hot start issues but cannot remember where I read it. IMO it is a good idea to try and may block hot air currents coming from cylinder up to the carb causing the fuel to vapour lock in the pump and or diaphragm area of the carb...