Just bought my first boat. Took it to get serviced so it would run perfectly first time out but that didn't seem to work. At first it worked fine, then decided to "bog out" when giving it more power. Later that day it worked great for an hour or so until towing the final tube ride, going close to top speed and it suddenly seemed to kick out of gear and rev like crazy without going anywhere. Now it "revs out" at anything above 2000rpm. Someone just told me that since it just got serviced that if they didn't fill the oil from the bottom it could have had air trapped inside which would have messed with a bering.... I know nothing about motors but would like to have some ideas of possible problems before going back to the mechanic, just incase it was something they screwed up. It's a 50hp Merc 500, not sure of the year but late 70's to early 80's probably. 3 tone blue stripes with white merc lettering. Any ideas?
