Clean cooling fins
Mud and grass block cooling fins on air-cooled engines; clean them after every trip.
Grease after every hunt
Submerged bearings take on water; grease to purge it before the boat sits.
MARINE EQUIPMENT
Mud motor (surface drive) fluids and lubricants.
Engine oil, drive housing care, and shaft bearing grease for long-tail and surface-drive mud motors on duck boats and jon boats.
Questions: [email protected] · Every AMSOIL link on this page carries dealer #30734402.
Fluids by compartment.
Confirm the fluid type, grade, and specifications in the mud motor (surface drive) maker’s manual before ordering. These examples are not a fitment result for a specific machine.
Engine
Air-cooled engines use the oil and viscosity the engine maker lists for the expected temperature; they run hot at low boat speed.
Small-engine oil
10W-40 Small-Engine Oil
10W-40 Small-Engine Oil for compatible four-stroke power equipment.
Product details Shop at AMSOIL ↗
Small-engine oil
15W-50 Small Engine Oil
15W-50 Small Engine Oil for compatible four-stroke power equipment.
Product details Shop at AMSOIL ↗
Small-engine oil
10W-30 Small-Engine Oil
10W-30 Small-Engine Oil for compatible four-stroke power equipment.
Product details Shop at AMSOIL ↗Drive housing or gearbox
Some drives have an oil bath or gearbox with a specified gear oil; belt drives need tension checks.
Gear oil
75W-90 Marine Gear Lube
75W-90 Marine Gear Lube for compatible differentials and gear assemblies.
Product details Shop at AMSOIL ↗
Gear oil
SEVERE GEAR 75W-90 Gear Lube
SEVERE GEAR 75W-90 synthetic gear lube for compatible gear applications, including demanding towing and hauling use.
Product details Shop at AMSOIL ↗Shaft and prop bearings
Grease drive shaft bearings and the pivot often; they run in mud and water.
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 ↗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 for a mud motor engine?
The oil the engine maker specifies for the temperatures you run in.
What grease for mud motor bearings?
The grease the drive maker lists, often a water-resistant type.
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 this page
https://a1syntheticoil.com/equipment/marine/mud-motor/
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]