Re: 1979 Merc 90hp
Good motor. It is the same basic motor as the 115. Compression should be over 100lbs in each of the 6 cylinders, with variations only being about 10% and no more. Make sure that your carbs are just right. If you run that engine lean, you will burn it up fast. Most parts are still available, but some are getting pricey. If you dont mind me asking, what did you give for it?
