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i have a 1984 cimmaron i/o 3.8 ltr omc 18 ft the prop is 14 1/2 -19 it's a little slow out of the hole pulling a tube the max rpm i get is 4400 rpm im new to boating so any info would be great thanks :sssh:

I just boaught a 1984 cimmaron 18 ft with 3.8 ltr omc stern drive the boat is in great shape and runs good i know nothing about omc or what size prop to use the prop is 14 1/2 -19 i get about 35 mph at 4100 rpm pulling a tube or not it seems to over rev any info will be great thanks