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By removing the no. 1 spark plug, inserting a screwdriver through it and observing its motion as the engine is turned by hand, I convinced myself that the mark on the pulley is accurate... If it is off, it could only be by the slightest degree.
I used the pulley & lower timing cover marks to set the no. 1 piston because I was able to turn the crankshaft easily by grasping the pulley, thanks to its greater diameter. The crank sproket doesn't really give an 147-lb weakling like myself much leverage to work with, and is harder to grab ahold of besides. Though I suppose I could attach the pullet bolt without the pulley, and turn the crank with a ratchet...
-David
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