Yes, RoosaMaster/Stanadyne, and the CAV DPA are both good, simple pumps compared to inline pumps, and the opposing plungers are busy on an eight cylinder engine. What does help them live is in most applications each plunger at full load delivery moves .040 inch or less. Inline pumps have the advantage when higher full load fuel delivery is needed, and will last 10,000 to 15,000 hours with normal service. Rotary pumps with the same care need service in most cases 2,500 to 4,000 hours. Good clean fuel, with no water or dirt will add life to any fuel system. Any pump that comes in for service I ask, how does engine start when HOT? Hard starting hot is a good sign the hydraulic head is getting worn internally.
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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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