Space puppy
I'm New Here
I am having trouble with my 0320 H2AD Duel mag single drive. left mag loses 4-500 rpm. right mag 50-75 rpm drop. both mags on I get 2300 rpm and runs fine. I am using fixed pitched Senench prop recomended by vans. only one time did it run with small equall rpm drop. I flew 1.8 hr. this day and when I returned I checked both mags and still 50-75 rpm drop. two days later at run up the left mag. showes 4-500 drop. I have replace both coils and condensers new wire harness clean plugs checked timing still the same drop. rebuilt engine by A&P now 4.8 hours on it. the A&P has run out of ideas. anybody with any ideas would be apprecated. Jerry Jones.