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Mercury 40 – 300hp Four-Stroke Outboard Maintenance: Changing Gear Lube

Hello Sunny Coast Mercury motor owners. 

This step by step how-to-video will walk you through the process of changing the gear lubricant on Mercury 40 – 300hp four-stroke outboard engines. For more information, please consult a Mercury Marine owner’s manual.

APPLICABLE ENGINES:

Verado: V-8 4.6L 250hp AMS and 300hp AMS

FourStroke: I-3 747cc 40hp; I-4 995cc 40hp CT, 50hp, 50hp CT, 60hp, 60hp CT; I-4 2.1L 75hp, 90hp, 90hp CT, 115hp and 115hp CT; I-4 3.0L 150hp; V-8 4.6L 250hp and 300hp; V-6 3.4L 175hp, 200hp and 225hp

Pro XS: I-4 2.1L 115hp and 115hp CT; I-4 3.0L 150hp; V-8 4.6L 200hp, 225hp, 250hp and 300hp; V-6 3.4L 175hp

SeaPro: I-4 995cc 40hp CT and 60hp CT; I-4 2.1L 75hp CT, 90hp CT and 115hp CT; I-4 3.0L 150hp; V-8 4.6L 225hp, 250hp, 300hp and 300hp AMS; V-6 3.4L 200hp

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