’07 340 with 8.1’s What kind of noise does an impeller make when it goes bad? Departing the anchorage both engine started and stabilized. Then I noticed the port engine RPM’s act sporadic, paused the radio and listened to a clunking/grinding sound. Quickly placed the engine into neutral-no change. Tried reserve perhaps to free debris but nothing and then the engine quit. Limped home on one engine. Belts are fine, oil levels good. No over temps. Thoughts or suggestions?