Thanks Dutch1, I will check those items. Not sure what an iso block is or how to diagnose - can you elborate?
Temps here have been very mild between 50 to 70 degrees so not sure adjusting the carb will help. Also unsure of carb problem due to constant timing of bogging down of the blower. After fifteen minutes of use the blower starts to bogg down. Every carb problem I have experienced has shown up at the start of the machine.