Milky gear lube means water
Water in the lower unit points to a seal problem; fix it before the next outing.
Winterize
Change oil and gear lube and fog the engine before storage.
MARINE EQUIPMENT
Four-stroke outboard fluids and lubricants.
Engine oil, lower unit gear lube, and grease for four-stroke outboard motors.
Questions: [email protected] · Every AMSOIL link on this page carries dealer #30734402.
Fluids by compartment.
Confirm the fluid type, grade, and specifications in the four-stroke outboard maker’s manual before ordering. These examples are not a fitment result for a specific machine.
Engine
Match the viscosity and certification the outboard maker lists, such as NMMA FC-W.
Marine engine oil
10W-40 Marine Engine Oil
10W-40 Marine Engine Oil for compatible marine engines.
Product details Shop at AMSOIL ↗
Marine engine oil
10W-30 Marine Engine Oil
10W-30 Marine Engine Oil for compatible marine engines.
Product details Shop at AMSOIL ↗Lower unit
Lower units use a marine gear lube; check for water at each change.
Gear oil
75W-90 Marine Gear Lube
75W-90 Marine Gear Lube for compatible differentials and gear assemblies.
Product details Shop at AMSOIL ↗
Tools & shop equipment
Marine Gear Lube Pump
AMSOIL Marine Gear Lube Pump for cleaner, easier fluid service in the garage or shop.
Product details Shop at AMSOIL ↗Grease and storage
Grease steering and tilt points; fog and stabilize for storage.
Grease & assembly lube
Synthetic Water-Resistant Grease
A synthetic grease for compatible components exposed to water, including boat trailers and powersports equipment.
Product details Shop at AMSOIL ↗
Cleaners & protectants
Engine Fogging Oil
An engine fogging oil for protecting compatible internal engine surfaces during storage preparation.
Product details Shop at AMSOIL ↗
Fuel additives
Gasoline Stabilizer
Gasoline stabilizer for equipment and vehicles being prepared for storage.
Product details Shop at AMSOIL ↗ORDER THROUGH INDEPENDENT AMSOIL DEALER #30734402
Ready to order, or have a question first?
Shop AMSOIL directly with Jeff’s dealer number already attached, or open a business account. AMSOIL handles pricing, checkout, and shipping. If you contact AMSOIL another way, give them dealer number 30734402.
Prefer to talk it through? Email Jeff at [email protected] with your equipment, the fluid now in use, and your approximate volume.
Frequently asked questions
What oil goes in a four-stroke outboard?
The viscosity and certification the outboard maker specifies.
How often should lower unit gear oil be changed?
At the maker’s interval, often annually.
General maintenance information. Always follow the equipment maker’s requirements and the current product data. Product availability, pricing, and account terms are set by AMSOIL.
Industries that use this equipment
More marine equipment
Open a commercial account with dealer #30734402
https://www.amsoil.com/business-opportunities/get-a-commercial-account/?zo=30734402
Jeff Pittman · A1 Synthetic Oil · Independent AMSOIL Dealer #30734402 · Newport, Washington · [email protected]