Merc

[catch fillet]

Purchased late 80s Mercury,150hp.When on the water running it sounds like a car without mufflers.Any Ideas?In the driveway it seeme like regular sound.Sounds like a dragster running on the water.

[skeetbum]

I have a Mariner 150 and you have to talk real loud to hear over it when up and running, much louder than my friends Evinrude. It kinda sounds like a hot rod. Nature of the beast. They're louder yet when they're modified. Hear em 'fore you see em.

[Barnacle Bill]

With the motor down in normal running position, look at the anti cavitation plate. It should be even with the bottom of the boat. Sometimes instead of adding a jack plate people will raise the motor to get more speed. That gets part of the exhaust out of the water making it sound louder.