I've had some 6.2s apart with over 500K miles on them and never saw any wear on the fuel pump drive. Unlike most gas engines, the 6.2 cam is forged steel and not just Parkerized on the surface. But, I guess anything can break or wear out. I suspect you've either got the wrong pump, or somehow got it installed incorrectly. It's an awful job to get one in, since there's no sure way to hold that plunger-rod out of the way. All you can do it stick heavy grease on it and hope it stays out of the way. At least on SB gas engines, there's a way to jam a lock bolt in sideways against it.
If all else fails, you can just stick in a electric pump - just still it as close to the fuel tank as you can.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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