Gearcase Lubricant
2004 Johnson 2-stroke 40HP and 50HP SR outboards
Draining
IMPORTANT: Gearcase lubricant under pressure and/or hot. If plug is removed from recently operated outboard, take precautions to avoid injury.
Remove the lubricant level plug, then the lubricant drain/fill plug, and drain the lube from the gear- case into container. Inspect the lube and the magnets the plugs for metal chips.
The presence of metal fuzz indicate normal wear of the gears, bearings, shafts within the gearcase. Metal chips indicate extensive internal damage.
Inspection
Inspect the lubricant for water contamination. Water make the lubricant milky in . However, normal aeration also cause the same .
check for water contamination, drain lubricant into suitable glass container. Allow the drained oil to settle for minimum of hour to deter- mine if there is abnormal amount of water in the oil. Some gearcase lubricants designed to mix with small amount of water from normal water vapor condensation within the gearcase.
Overheated lubricant will have black color and burned odor.
Internal gearcase inspection is recommended when lubricant is contaminated shows signs of failure.
Filling
Secure the gearcase in vertical position.
Remove the lubricant level plug and the lubricant drain/fill plug.
Slowly fill the gearcase with Ultra-HPF gearcase lube through the drain/fill hole until it appears at the oil level hole.
Filling the gearcase too quickly cause air pockets and the gearcase m not fill completely.
Clean plug seal and install the lubricant level plug and new seal, then the lubricant drain/fill plug and new seal. Tighten them to torque of 60 to 84 in. Ibs. (7 to 9.5 Nm).
Updated on: Tuesday, November 17, 2020