This is a comprehensive factory service manual that covers Mercruiser Marine Engines, specifically the GM 4-Cylinder 1985-1989 90-14693-1R1 model. It encompasses all the necessary information for servicing and repairing your Mercruiser engine or Stern Drive unit. The manual is fully indexed and bookmarked for convenient and efficient use, making it an invaluable resource for professional mechanics and DIY enthusiasts alike.
