3885250 Volvo Belt Tensioner | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta Automatic Serpentine-Belt Tensioner - Part Number: 3885250

A genuine used spring-loaded belt-tensioner assembly for selected Volvo Penta GM-based petrol marine engines.

The tensioner automatically applies a controlled load to the serpentine belt as the belt stretches and engine speed changes. Volvo Penta identifies 3885250 as the later tensioner associated with earlier 3587858, and the assembly is used across a wide range of 4.3L, 5.0L, 5.7L and 8.1L petrol packages.

⚙️ Key Features

• Genuine Volvo Penta automatic belt tensioner
• Correct current reference 3885250
• Associated with earlier tensioner 3587858
• Spring-loaded automatic belt adjustment
• Extensive Volvo Penta, PCM, Crusader and aftermarket interchange

🚤 Compatibility

Commonly used on

• Volvo Penta serpentine-belt petrol engines
• GM-based V6 and V8 marine packages
• Sterndrive, inboard, Ocean Series and selected IPS petrol engines

Typically suits selected

• Volvo Penta 4.3GL, Gi and GXi variants
• Volvo Penta 4.3OSi variants
• Volvo Penta 5.0GL, Gi and GXi variants
• Volvo Penta 5.0OSi variants
• Volvo Penta 5.7Gi and GXi variants
• Volvo Penta 5.7OSi and OSXi variants
• Volvo Penta 8.1Gi and GXi variants
• Volvo Penta 8.1OSi variants
• Volvo Penta V6-200 and V6-225
• Volvo Penta V8-225, V8-270, V8-300 and V8-320
• Engine Type: GM-based V6 or V8 petrol marine engine
• Displacement Range: 4.3L - 8.1L
• Year Range: Broad model coverage; verify by engine designation

🔌 Function

The tensioner keeps the accessory belt tight enough to drive the alternator, circulation pump and other pulleys without slipping while allowing controlled movement as belt load changes.

⚠️ Common Signs of Failure

• Belt squeals during starting or acceleration
• Tensioner arm vibrates excessively
• Belt repeatedly comes off
• Pulley bearing grinds or seizes
• Spring tension is weak
• Tensioner arm does not return smoothly
• Belt develops glazing or edge wear
• Tensioner mounting point is cracked
• Accessories stop charging or circulating correctly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3885250 → Replaces or updates 3587858
• 3587858 earlier Volvo Penta belt-tensioner reference
• Some replacement catalogues also associate 3587859 and 3861010 with this tensioner family

OEM / Related Numbers

• Volvo Penta: 3885250
• Volvo Penta: 3587858
• Volvo Penta: 3587859 - application-related reference
• Volvo Penta: 3861010 - application-related reference
• PCM / Crusader: RA068001
• GM: 12580828 - reported automotive crossover on applicable 8.1L installations
• Idler pulley: 3861009

Aftermarket / Verified Equivalents

• PCM / Crusader: RA068001
• Poseidon Marine replacement for 3587858 / 3587859 / 3861010 / 3885250
• FridayParts replacement tensioner
• HOLDWELL replacement tensioner
• Jeenda replacement tensioner
• Generic marine tensioners sold under 3885250 / 3587858 / RA068001
• GM 12580828 is a reported crossover and must be checked for pulley and spring specification

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated