Echo SV-4B1E engine, Zama cube carb
Mantis tiller starts, idles, runs smooth at half throttle, BOGS BEFORE WIDE OPEN.
New no lead regular fuel mixed 50:1 with Echo 2-cycle oil. In the last month I have replaced plug, air filt., installed carb rebuild kit , fuel lines, fuel intake filter, cleaned exhaust, removed spark arrestor screen, sprayed carb cleaner throughout carb. What am I missing? (The good news is, it doesn't run any worse than before I started messing with it.) This tiller is approx 11 years old. I have used it most years for 3-4 hours at most. I have never done proper fuel draining for storage, but it has started on the third pull every time until this year. It has always been stored inside and is otherwise in very nice shape.