My 1958 Mark 30 tiller runs nicely from idle to full throttle. I have tried to adjust the throttle and shift lock drum to get it set near 1,800 rpm for proper shifting (per service manual) without success. It’s nearly twice that rpm and the linkage from the cross shaft to the shaft that controls the magneto won’t allow enough movement to set it correctly. Any thoughts to what I’m missing? I removed the magneto for service and noted where all the linkage connects when I installed it. It will shift into forward from neutral when the shift lock drum is not contacting the shift lever.
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