Sierra Marine Trim and Tilt Fluid

Sierra Power Trim & Tilt Fluid for Marine Hydraulic Systems

Every outboard and sterndrive with power trim relies on a small, sealed hydraulic system to raise, lower and hold the drive at the right angle. The fluid inside that system does more than transfer pressure. It lubricates the pump and rams, protects seals, and has to perform in everything from cold morning launches to hot, heavy-load days on the water. Sierra's Power Trim & Tilt Fluid is built for that job, and it is a focused, practical choice for owners who service their own boats.

What Sets Sierra's Formula Apart

Sierra's Power Trim & Tilt Fluid is formulated for high operating pressure and designed for heavy-duty use across varied temperature ranges. Several features stand out:

• Anti-foam additives that promote uniform flow and reduce air contamination in the hydraulic circuit. Aerated fluid can make a trim system feel spongy or slow to respond.
• Anti-wear, anti-oxidation and stabilizing additives intended to deliver consistent, no-fade performance in trim, tilt and related hydraulic applications.
• Lubrication and corrosion protection for internal hydraulic components, which matters in a saltwater or humid environment.
• Seal and hose care, with the formula enhanced to help protect seals, hoses and other components from drying, cracking or corroding.

The flagship product is the 10-ounce tube, part number 18-9750-0. The size suits quick top-offs and complete fluid changes. Cross-reference data lists it alongside comparable fluids from Pennzoil Marine, Evinrude/Johnson (BRP) and Yamaha Marine, so owners can match it to the fluid they would otherwise buy for their drive.

Why Boat Owners Choose It

Sierra has been a leading name in aftermarket marine engine and drive parts since 1966, and its products are engineered to meet or exceed the original equipment parts they replace. That OEM-equivalent approach carries over to maintenance fluids. A trim and tilt reservoir is a low-cost item to service, but running it low or contaminated can lead to a drive that creeps down under power, struggles to hold trim, or wears out a pump prematurely. Using a purpose-made fluid rather than a general-purpose substitute helps keep the system working as designed.

Tips for Servicing Your Trim System

• Check the trim reservoir level as part of regular seasonal maintenance, following your engine manufacturer's procedure.
• Look for weeping around rams and fittings. Fluid loss usually signals a seal or hose problem that topping off alone will not solve.
• Avoid mixing unknown fluids. Confirm that your drive's specification matches the product you choose.
• Keep a spare tube aboard so you can restore proper fluid level without cutting a day on the water short.

Explore More

To see everything the manufacturer offers across engine, drive, ignition and maintenance parts, visit the full Sierra brand page. If you want to compare formulations from other manufacturers, browse the complete Marine Trim and Tilt Fluid category.