Hi all, I recently purchased a "new" Sachs engine that has never been run or at least since factory run some time ago. The engine will start and idle fine but on run up it surges and sounds like it misses and burbles at mid-high end and just won't top out. I am turning a 22x10 wood prop and the engine is a older Sachs 3.4 with CH ignition. Spark is good and a carb kit was just installed but it seems to be doing the same thing. I started with both high and low speed needles at 2 turns out and worked it around from there. I can get a great idle but slow transition with a surge and burble at high end. At about 3/4 throttle it seems to run best. Any ideas on these engine settings would be greatly appreciated.
PS: I am running a break in 32:1 fuel mixture and it starts on first flip. Thanks