"Doral Prestancia 270MC runnin
"Doral Prestancia 270MC running twin 4.3L LX engines and Alpha One Gen II (port is counter rotating) sterndrives.
I have a vibration / rumble in the starboard drive. At 1500-1600 RPM it is most noticeable and then calms down a bit around 2000 RPM. At 3200-3400 RPM it is more like a rolling rumble.
I am wondering if I have a bad gear set, or worn bearings in the drive or if I might have a bent shaft. The drives only have about 250 Hours on them since they were completely rebuilt. The vibration became noticeable about 25hrs runtime ago.
I am prepared to replace the entire starboard drive with a brand new unit, but would hate to be wasting my money on this.
Any help or suggestions would be appreciated."
"Doral Prestancia 270MC running twin 4.3L LX engines and Alpha One Gen II (port is counter rotating) sterndrives.
I have a vibration / rumble in the starboard drive. At 1500-1600 RPM it is most noticeable and then calms down a bit around 2000 RPM. At 3200-3400 RPM it is more like a rolling rumble.
I am wondering if I have a bad gear set, or worn bearings in the drive or if I might have a bent shaft. The drives only have about 250 Hours on them since they were completely rebuilt. The vibration became noticeable about 25hrs runtime ago.
I am prepared to replace the entire starboard drive with a brand new unit, but would hate to be wasting my money on this.
Any help or suggestions would be appreciated."