pylek wrote:I will check the intake tube again. After cleaning and inspection, I installed it with a new gasket, and hand tightened the screws with a nut driver, tight, but not twist off the heads tight. I couldn't find a torque spec in the Single Cylinder L-Head service manual.
pylek wrote:Alright, after a hiatus, I am back on this pushmower. I have pulled the head and valves. I cleaned most of the carbon from the head, piston, and valve area. I lapped the valves and set the clearances. Put it all back together with new gaskets. Couldn't find a listing for the intake pipe screw torque, so I used the general hardware spec.
Started the engine, no change...
Last night, I checked the spark while it was surging. Spark looked good at .165" on my tester. However, with a larger gap, the engine started to stutter, spark was failing.
So, I put a known good used ignition armature on it. No change, engine still surged.
I liberally sprayed the exposed portion of the intake pipe, and sprayed brake cleaner into the blower housing around the intake pipe. Again, no change in the surging.
Now, with the engine good and warmed up, if I hold the throttle, the engine speed seems to settle out. I say seems because, by ear the engine sounds better, but I am unable to get a stable reading on my TA100 SmartTach. The reading cycles from 1500 to 4100rpm. The engine does not sound like it is surging when I hold the throttle.
So, I am running out of ideas...
Seth K. Pyle
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