This manual covers Gray Marine engines, specifically those associated with Chris Craft, from 1939 and onward. These gasoline-powered marine engines, available in 4 and 6-cylinder configurations, were designed for marine propulsion and operation within the marine environment. The Gray Marine engine design is recognized for its robust construction and reliability, making it a dependable choice for vintage marine applications.

This English-language Maintenance/Service manual provides comprehensive guidance for owners and technicians. It details essential maintenance and service procedures, including recommended service intervals, oil types, and capacities, all tailored to the specific needs of these engines. By consulting this manual, users can ensure the proper upkeep and longevity of their Gray Marine engines, facilitating efficient operation and troubleshooting.