Volvo Penta serpentine drive belt 3889124 — direct-fit OEM replacement for 4.3–5.7L engines, supersedes 3817287

This is a brand-new Volvo Penta serpentine (drive) belt, part number 3889124, designed as a direct-fit replacement for the listed 4.3–5.7 engine family models.

Keep your marine engine accessories turning smoothly with an OEM-spec Volvo Penta belt built to the original dimensions and materials. This replacement belt restores proper routing and tension for alternators, water pumps and other front-end accessories on compatible Volvo Penta gasoline sterndrive and inboard/outboard engines. It’s supplied singly (sold each) and is listed as superseding part number 3817287 — still, always confirm fitment against your engine serial or dealer records before ordering.

Which Volvo Penta engines will this belt fit?

This belt covers many common gasoline models in the 4.3 and 5.0–5.7 liter ranges. It was produced to match the original factory specifications for those engines and most of their variations (GL, GXi, OSi, OSXi, etc.).

• Compatible with numerous 4.3GL/GXi/OSi variants and most 5.0GL/GXi/OSi variants.
• Also fits numerous 5.7 Gi/GXi/OSi and OSXi model families.
• Part number 3889124 supersedes 3817287 — use either as cross-reference when checking fit.
• Always verify fitment against your exact engine code and installation.

How does replacing the serpentine belt help my boat’s performance?

A correct, undamaged belt ensures accessory components run at the intended speed and tension, which preserves charging, cooling and overall reliability while underway. A worn or slipping belt can cause overheating, loss of alternator output or noise — replacing it reduces those risks and helps maintain peak engine operation.

• Restores correct accessory drive ratios for alternator and water pump.
• Prevents slippage, squeal and premature wear of pulleys and tensioners.
• Improves reliability during long cruises and heavy electrical loads.

What should I check before buying this belt?

Measure the existing belt or consult your engine plate/service manual to confirm the correct replacement number. Inspect routing diagrams and pulley condition; a new belt is only as effective as the pulleys and tensioner it runs on.

• Compare your current belt number or length to PN 3889124.
• Check pulleys and tensioner for corrosion, grooving or play before installation.
• Confirm that 3889124 is the superseding part for your older part numbers like 3817287.

How easy is it to install this OEM Volvo Penta belt?

Installation is straightforward for anyone familiar with accessory-belt replacement: release tension, route the belt per the diagram, then reapply proper tension. If you’re unsure, a mechanic or certified marine technician can fit it quickly and verify tension and pulley alignment.

• Requires basic hand tools; tensioner or adjustment bolt access needed.
• Follow manufacturer routing and torque specs where applicable.
• Professional installation recommended if access is limited or pulleys show wear.

Who this is for: Boat owners, marine technicians and fleet maintainers who run Volvo Penta gasoline 4.3L to 5.7L engine families and need a genuine OEM replacement belt. Ideal for scheduled maintenance, repower projects or restoring correct accessory drive function, this belt suits anyone seeking a reliable, factory-spec part with clear cross-reference to the superseded number.

• SKU: 3889124
• Sold each (single belt)
• Please verify your own fitment before ordering
• Superseded from: 3817287