96 Cobalt 4.3L
I just installed a NEW MERC Alpha 1 Gen 2 outdrive and took it out for it's maiden voyage. At 3000 rpms I get this whine/drone, goes away at 2800 rpms and 3200 rpms, noise shuts off like a switch was thrown when out of that narrow rpm range.
I put a few hours and about 25 miles on it, came home and drained the oil. Very little if any thing on the magnet, a few small slivers.
Could it just be the outdrive still just needs broken in? Or is there something more to worry about? It seemed to be getting quieter as time went on, but maybe I was just becoming tone deaf to it??
Could it just be a resonant frequency noise due to the prop?
I just installed a NEW MERC Alpha 1 Gen 2 outdrive and took it out for it's maiden voyage. At 3000 rpms I get this whine/drone, goes away at 2800 rpms and 3200 rpms, noise shuts off like a switch was thrown when out of that narrow rpm range.
I put a few hours and about 25 miles on it, came home and drained the oil. Very little if any thing on the magnet, a few small slivers.
Could it just be the outdrive still just needs broken in? Or is there something more to worry about? It seemed to be getting quieter as time went on, but maybe I was just becoming tone deaf to it??
Could it just be a resonant frequency noise due to the prop?