Chainsaw Repair

Quote from: sharkey on October 19, 2013, 05:17:31 pm

Careful.  B12 and so on will melt the check valves in the older zama for sure and some of the walbro's.  Try spray brake clean or pine sol in your ultrasonic.

Are you referring to 2 or 4 cycle carbs when you say B12 will melt the check valves? Never heard using brake cleaner or pine sol in a ultrasonic cleaner.  I have the heated HF ultrasonic cleaner and I use the design technology solution with it. I use more carb cleaner spray on 4 cycle carbs more than anything.

I am referring to small 2 cycle carbs. 

The small 2 cycle carbs use different types of check valves to control where barometric pressure can reach.  Main jet (power circuit) nozzles can contain a rubber check valve which will melt in the presence of these caustic cleaners.  Some guys will only use WD-40 nowadays.