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 - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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