Sierra 18-2136 Starboard Power Trim Hose - Replaces Mercury Marine 32-99902, 32-864589 - Fits MerCruiser Alpha One & Bravo

The Sierra 18-2136 Power Trim Hose is a starboard-side power trim hose designed for MerCruiser MCM 120-260 engines paired with Bravo and Alpha One stern drives. It connects to the bottom of the trim cylinder and measures approximately 11 1/4 inches in length, matching the trim cylinder casting numbers 98704 and 98704-1. Built from metal with a white finish, this hose is engineered as a direct replacement for the original equipment hose on applicable MerCruiser sterndrive setups, fitting R, MR, Alpha One, and Bravo I, II, III, X, XR, and XZ drive configurations. Because the power trim system uses separate port and starboard hoses that route to opposite sides of the trim cylinder, installing the correct side matters -- this listing is the starboard hose only; the port-side counterpart is a different Sierra part number. The hose is intended as a like-for-like replacement for the OEM Mercury Marine hose bearing part numbers 32-99902 and 32-864589, restoring proper hydraulic fluid flow to the trim cylinder circuit. Replacing a cracked, corroded, or leaking power trim hose helps prevent hydraulic fluid loss, restores trim/tilt responsiveness, and avoids further strain on the trim pump or cylinder. At 0.12 pounds, it is a compact, lightweight component that a marine technician or experienced boat owner can install without major disassembly beyond accessing the trim cylinder fittings.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2136
• Side: Starboard
• Hose Length: 11 1/4 inches
• Metal Tube Length: Approximately 11 1/4 inches
• Material: Metal
• Color: White
• Product Dimensions: 11.25 inches L x 11.25 inches W
• Weight: 0.12 pounds
• UPC: 030999237200
• Fits: R, MR, Alpha One, Bravo I, II, III, X, XR, XZ
• Trim Cylinder Casting Number: 98704, 98704-1
• OEM Cross Reference: 32-99902, 32-864589

Fitment

Fits MerCruiser MCM 120-260 engines with R, MR, Alpha One, and Bravo I, II, III, X, XR, and XZ stern drives. Starboard side only; this hose connects to the trim cylinder bearing casting numbers 98704 and 98704-1.

Replaces (OEM)

Mercury Marine 32-99902, 32-864589

Frequently Asked Questions

Is the Sierra 18-2136 a port or starboard hose? The Sierra 18-2136 is the starboard power trim hose. The port-side hose that connects to the opposite side of the trim cylinder is a separate Sierra part number, so make sure you order the correct side for your installation.

What does the Sierra 18-2136 replace? It is a direct replacement for the OEM Mercury Marine power trim hose with part numbers 32-99902 and 32-864589.

What drives and engines does this power trim hose fit? The 18-2136 fits MerCruiser MCM 120-260 engines equipped with R, MR, Alpha One, or Bravo I, II, III, X, XR, or XZ stern drives.

How long is the Sierra 18-2136 power trim hose? The hose measures approximately 11 1/4 inches in length, with a metal tube length of approximately 11 1/4 inches as well.

What material is the 18-2136 power trim hose made from? This power trim hose is constructed of metal with a white finish.

How much does the Sierra 18-2136 weigh? The Sierra 18-2136 power trim hose weighs 0.12 pounds.

Which trim cylinder casting numbers does this hose connect to? The 18-2136 connects to a trim cylinder bearing casting numbers 98704 and 98704-1.

Is this a genuine Sierra part or an aftermarket copy? The 18-2136 is a genuine Sierra-branded power trim hose manufactured as a direct-fit replacement for the original Mercury Marine hose, not a generic aftermarket copy.

What is included when I order the 18-2136? You receive one Sierra 18-2136 power trim hose, the complete metal hose assembly measuring approximately 11 1/4 inches.

Why would I need to replace this power trim hose? A cracked, corroded, or leaking power trim hose like the 18-2136 should be replaced to prevent hydraulic fluid loss and restore proper trim and tilt operation.

Does the 18-2136 include mounting hardware or fittings? The Sierra 18-2136 is the hose assembly itself, sized to connect at the bottom of the trim cylinder on applicable MerCruiser Alpha One and Bravo drives.