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Old 10-08-2015, 01:02 AM   #7
THD
Guru
 
City: Seattle
Join Date: Apr 2012
Posts: 1,142
CWC-we have a full displacement boat with twin 158 HP John Deeres w/turbos. We cruise at about 1600 RPM and seldom get above 1800. WE have never had any problems. Never have noticed any whine, but then our ER is pretty well soundproofed.
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