AMSOIL Synthetic Marine Oil - 2-Stroke, 4-Stroke, and Diesel

AMSOIL 2-Stroke Synthetic Marine Oil

For two-stroke engines, wear protection and engine cleanliness are key. Oils with inadequate detergency can allow deposits and ring sticking, which robs your engine of power. Today’s engines run hotter than their predecessors, so using an oil that delivers excellent wear protection is also vital.

AMSOIL 4-Stroke Synthetic Marine Oil

If you own a four-stroke engine, make sure the oil you use is formulated to withstand the increased stress of high-rpm operation. And use an oil designed to guard against rust and corrosion. Auto/light truck oils typically don’t contain sufficient rust and corrosion inhibitors for marine engines.

AMSOIL Synthetic Marine Gear Lube

Change lower unit gear lube – Your boat motor’s lower unit is continuously exposed to water. If water infiltrates the lower unit, the gear lube can foam, which compromises wear protection. Change the gear lube at the end of the season to ensure peak protection the following year.

Check the prop for debris – While you’re changing the gear lube, remove the prop and check for wrapped fishing line or other debris. It can damage the seal that keeps water out of the lower unit, allowing water intrusion.

The bearings housed in the bearing carriers, require consistent lubrication to prevent failure. The number one cause of bearing failure is degraded gear lubricant or starvation due to improper maintenance.

AMSOIL Synthetic Water Resistant Grease

Grease trailer bearings – Like the tires, trailer wheel bearings are easy to overlook. They are submerged in water every time you launch and load your boat. Although the hub seals are designed to keep water out, age and neglect can allow water intrusion, which invites rust and corrosion.

Rust acts like sandpaper and scours the ball bearings, causing them to run hotter and boil the grease out, worsening the problem. Grease the bearings at least once a year with a high-quality synthetic grease designed to resist water washout.

Grease tilt tube – Rust and corrosion can form on the tilt tube, preventing the motor from raising or lowering and restricting steering. At the end of the season, grease the tilt tube using a water-resistant grease. In addition to protecting against rust and corrosion, seasonal greasing also eases steering input.

AMSOIL Fuel Additives

Treat fuel continuously during the season – Most people are accustomed to using automotive fuel additives periodically. In marine applications, however, it’s best to use them with every tank of fuel. Why? Because ethanol, present in most gasoline sold today, has a natural affinity for water.

If moisture collects in your gas tank, it can bond with the ethanol and reduce performance. Treat fuel with an additive designed to keep water dispersed in the fuel tank and prevent phase separation, such as AMSOIL Quickshot®. Continuous use also helps prevent formation of performance-robbing deposits, varnish and gums.