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Thanks for the reply. I think the excess fuel check valve purge may be where I look next. I’ve attached links of the motor running in a barrel. The points have checked spot-on at 0.020″. Really three symptoms here.
1. Motor does not idle well
2. Motor smokes excessively. Oil mixture is the recommended 16:1. The smoking is new.
3. Seems to be some faint knock.
Thanks for all the advice.
Buster
OK, watched both videos. I realize that audio can be deceiving, but I don’t think this engine is running on both cylinders. Try pulling the plug wires one at a time while the engine is running, (please use insulated plastic pliers and keep yourself from getting wet so you don’t get shocked). The engine should stall when either plug wire is pulled. If pulling one of the plug wires doesn’t seem to change running RPM, then that cylinder isn’t operating for some reason. Could be a lack of spark, could be a compression/crankcase sealing issue, or perhaps water intrusion into the combustion chamber.
I don’t know what the loud knocking noise is all about, again the audio quality could be confusing this issue. I did notice that the tiller throttle control seemed to jump towards stop while you were pulling the recoil slowly, which makes me think something is dragging on the flywheel magnets.
Again, lets stick to basic/quick inspections/checks here before jumping in too deep.