LIT-18616-04-37 covers the GP1900 HO for model years 2024, 2025 and 2026, and includes the GP1900 HO with audio alongside it. The 2024 craft is coded GP1900B-AB.
A two-model, three-year book is about as tight as coverage gets in this range, which makes it easy to be confident a given specification is the right one. Read the plate for GP1900B-AB and you are done checking.
Service content
Engine overhaul with torque figures and inspection limits, jet pump and driveline work, fuel delivery and cooling, steering, hull and hood hardware, maintenance intervals, and the complete electrical schematics. Troubleshooting runs from symptom through ordered checks to cause.
This is Yamaha's own documentation for its dealer network, so it states the number you need and the limit you measure against rather than advising you to have the work done elsewhere.
