GEAR & BEARING GP-SWING 2291077 - Caterpillar

Proper Grounding
Proper grounding for vessel and engine electrical systems is necessary for proper performance and reliability.
Improper grounding will cause uncontrolled and unreliable circuit paths.This can result in damage to the engine's crankshaft main bearings, crankshaft journal surfaces or other engine componets, and can cause electrical activity which may degrade the boat's electronics and electrical communication equipment.
The engine's alternator, starting motor, and ALL electrical systems MUST be grounded to (-) Battery, and the alternator and starting motor MUST meet marine isolation requirements.For engines which have the alternator grounded to an engine component, a ground strap MUST connect that component to (-) Battery and the component MUST be electrically isolated from the engine.Ground Plate
A ground plate with a direct path to (-) Battery is permissible to use as a common ground point.Wire Size
The wire size of a ground plate to which an alternator is grounded MUST be of adequate size to handle full alternator charging current.