Companion book to MARINE DIESEL BASICS, also by Dennison Berwick.
Record what you've done, keep it all in one place, and especially helpful is all the data included in the book. There are separate log sections for fuel, engine oil changes, gearbox/transmission fluid changes, fuel filters, impellers inspections/changes, engine coolant, anode inspections, saildrive gear oil changes, etc.
There is info on oils, belts, batteries, conversion tables, electricals, weights, measurements, and more.
Softcover, 208 pp