21390 Aftermarket Power Trim Ram Bushing Kit | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement MC-1 Rear Trim Ram Anchor Pin Kit - Replaces Part Number: 21390

New GLM rear trim-ram bushing kit for early MerCruiser MC-1 drives with small rubber bushings. It services the rear anchor position above the propeller.

⚙️ Key Features

• Rear anchor kit for early MC-1 drives

• Small-rubber-bushing design

• Rear pin approximately 7-1/2 inches long

• 3/8-24 threaded hardware

• Complete pin, nut, washer and bushing set

🧰 Kit / Assembly Contents

• 1 × Rear anchor pin - MerCruiser P/N 17-45738

• 2 × Locknuts - MerCruiser P/N 11-13437-1

• 2 × Washers - MerCruiser P/N 12-45737

• 2 × Washers - MerCruiser P/N 12-46765

• 4 × Small trim-ram bushings - MerCruiser P/N 23-89574

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21390 (GLM aftermarket complete rear kit; no single MerCruiser kit number)

OEM / Related Numbers:

• 17-45738

• 11-13437-1

• 12-45737

• 12-46765

• 23-89574

Aftermarket / Verified Equivalents:

• GLM: 21390

• Aftermarket MC-1 rear anchor-pin kits matched to GLM 21390

🚤 Compatibility

Commonly used on:

• Early MerCruiser MC-1 rear trim-cylinder anchors

Typically suits:

• Engine / Drive models:

• 120 and 140, 1970-1982, serial 2791957-6225576

• 470, 1978-1982, serial 4208730-6225575

• 485, 1980-1982, serial 4208730-6225575

• 165, 1970-1981, serial 2763442 and above

• 888/225/233 and 898/228/250/260 within the documented MC-1 ranges

• HP / Drive Range: 120HP - 260HP

• System Type: Early MerCruiser MC-1 dual trim-cylinder anchor system

• Year Range: 1970 - 1982

• Serial / Component Identification: Rear small-bushing kit. Front companion kit is GLM 21310.

🔌 Function

The anchor-pin and bushing kit supports the trim-cylinder pivots, removes excessive side movement and allows the cylinders to articulate without metal-to-metal wear.

Common signs of failure / service requirement:

• Excessive play at the front or rear trim-cylinder anchor

• Knocking or clunking while trimming

• Worn, split or missing rubber bushings

• Corroded anchor pin or damaged retaining hardware

• Trim cylinders do not remain correctly aligned

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging