RECORD IMPORTANT INFORMATION! - G3 Boats PDF fileA jack plate is sometimes used on boats to adjust installation height. Do not use a jack plate on your G3 boat unless it is specifically designed for one, and then only use the G3 recommended jack plate. Other jack plate installations are considered misuse and are not covered by warranty. Do not attempt to alter your G3 boat to increase G3 Pontoon Boat Wiring - Wiring Forums Trying to find information regarding G3 Pontoon Boat Wiring? you are right here. You may be a service technician who wishes to look for references or resolve existing issues. Or you are a student, or maybe even you who just would like to know regarding G3 Pontoon Boat Wiring. G3 Pontoon Wiring Diagram. Pontoon Accessories, Schematics - Marine Electrical Wiring Schematics for G3 Boats. Wiring Diagrams - Page 1. Wiring diagrams for Alumcraft, All-Weld, Baymaster, Challenger Off Shore, Landau, and Larson. Information for boats built before 2001 not available. Contact your local dealer for reference material.