560 fueling issue

[outinthewood]

Well I don't have any theories only stating things as I find them with regards to my saws running which on the whole I find they do a very good job at doing ! 

Eddy are you sure about the carb issue for 070/090 ? I have a reasonable understanding of them and have never seen more than one part number for the Tillitson HS (?) carb which was fitted from day one of the Contra etc. ?

[Stretchsaws]

The error codes in the CST can help to point you in the right direction, but I find the fuel settings info more useful IMO.

If you know what the Autotune chip is looking for when it's doing its micro-adjustments, then you can get a snapshot of where going on inside the saw. For example, if it's adding a lot of fuel to compensate for a leaky de-comp valve, (550xp/560xp) then it could be too flooded to start correctly. Just an example.  The CST is just another tool in the toolbox, it doesn't replace all the other tools.

[Sveriges]

Exactly why a pressure test is so important on these. Waste of time repairing them if you haven’t made sure the engine is air tight. However it still surprises me the amount of people who don’t have the correct tools