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HP 500 Ignition
My HP 500 EFI is runing a little rough lately. You can hear the motor slightly speed up or slow down by 100 to 400 rpm. If you look at the tach it at any rpm it will also spike up about 300 rpm about every 10 seconds or so. It is worse the longer I run the boat in hot weather. Does anyone know does this sound like a coil, distributor????
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