SELOC Marine tune-up and repair manuals are the most comprehensive and authoritative resources available for outboard, inboard, and stern-drive engines, as well as personal watercraft. Since 1974, SELOC has been the leading source of detailed, reliable information for the marine industry, serving both professionals and enthusiasts alike.

Designed and written to meet the needs of professional mechanics, do-it-yourself boat owners, instructors, and students, these manuals are based on actual engine teardowns conducted by SELOC’s experienced editors and authors in their dedicated on-site facility. This hands-on approach ensures accuracy and practical relevance in every publication.

Each manual features easy-to-follow, step-by-step illustrated procedures, making complex repairs accessible. They include hundreds of exploded drawings, photographs, and tables to aid understanding, along with troubleshooting sections to help diagnose and resolve issues efficiently. Additionally, the manuals provide precise specifications and wiring diagrams for comprehensive technical guidance.

Covering all engines from 65 to 300 horsepower, including V4, V6, and V8 configurations, these manuals boast over 850 illustrations. Whether you are a professional mechanic or a dedicated boat owner, SELOC manuals offer the detailed, reliable information needed to perform maintenance and repairs confidently.