Motor is a 1999 Merc 200 EFI
Was about 500 yards from the ramp and running about 40 mph and all of a sudden a loud clanging noise coming from the upper part of the midshaft.....Thought I snapped a rod but enginge starts fine and goes in and out of gear fine and prop is not turning when in neutral. So I ruled out a drive shaft bearing and a drive shaft breakage. Only thing I can think of it being is the exhaust pipes running down that maybe one of them broke or blew a hole in the can not really sure any ideas? Got the boat Tuesday and it is already in the shop![]()
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Hopefully it is not something major and can be a somewhat cheap fix. If you put your hand over the exhaust port on the midshaft area the noise gets quite but when you remove your hand it sound like someone is in the mid shaft area beating from the inside out with hammer