ARCO MerCruiser Replacement Tilt Trim Reservoir Kit

The ARCO M525 reservoir kit is a replacement fluid reservoir for a compatible MerCruiser tilt and trim system using the ARCO 6275 motor. It is intended to replace the reservoir assembly when the original tank, cap, sealing components, or mounting hardware are no longer serviceable. The kit is a system-specific repair part, so matching the existing trim motor and reservoir style is important before the old assembly is removed. It cross-references Mercury Marine 18525A1 for additional fitment confirmation.

ARCO supplies the reservoir, cap, O-rings, and mounting screws together so the main reservoir-service pieces are available in one package. Replacing the sealing components at the same time can help avoid reusing hardened O-rings from an older assembly. The mounting screws supplied with the kit are intended for the specified reservoir installation rather than requiring the installer to reuse corroded hardware. The parts should be kept clean during assembly so dirt is not introduced into the hydraulic trim system.

Before installation, compare the shape and mounting layout with the existing reservoir and inspect the surrounding trim pump for leaks or damage that could have caused the original problem. Refill and bleed the system according to the engine or drive manufacturer’s service procedure after the reservoir is installed. The supplier lists ARCO Assurance 12-month parts-and-labor warranty protection for this replacement kit. Correct fitment and proper installation remain important to warranty coverage and reliable trim operation.

• Reservoir, cap, O-rings, and mounting screws included
• Designed for service with the ARCO 6275 tilt motor
• Cross-references Mercury Marine 18525A1
• Intended as a complete reservoir-service package

For additional tilt and trim service parts and replacement motors, Browse more Tilt & Trim Motors for related replacement and service components.