Mercury Quicksilver Serpentine Belt 880566Q14 | Verado L4 & L6 Outboard
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Mercury Quicksilver Serpentine Belt 880566Q14
Part Number: 880566Q14
Brand: Mercury / Quicksilver
Official Product Type: Serpentine Belt — Multi-Rib Accessory Drive Belt
Superseded by: 8M0232583 (current Mercury replacement — confirm which part number is current for your engine via the Mercury parts diagram)
System: Accessory Drive / Alternator Drive
Engine Family: Mercury Verado In-Line 4-Cylinder (L4) and In-Line 6-Cylinder (L6) Outboards
A genuine OEM Mercury Quicksilver multi-rib serpentine belt for applicable Mercury Verado outboards. This belt transfers power from the crankshaft to the alternator and other belt-driven accessories, maintaining battery charging and supporting reliable engine operation. A worn or failed serpentine belt can cause charging failure, accessory malfunction, or engine overheating — making it a critical scheduled service item on Verado outboards.
Compatible Applications
- Mercury Verado L4 In-Line 4-Cylinder — 135 HP, where specified by serial number
- Mercury Verado L4 In-Line 4-Cylinder — 150 HP, where specified by serial number
- Mercury Verado L4 In-Line 4-Cylinder — 175 HP, where specified by serial number
- Mercury Verado L4 In-Line 4-Cylinder — 200 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 200 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 225 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 250 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 275 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 300 HP, where specified by serial number
- Mercury Verado L6 In-Line 6-Cylinder — 350–400 HP, where specified by serial number
- Many engines with serial number 1B311420 and newer — confirm by parts diagram
Belt fitment varies by engine generation and serial number range. Always confirm part number 880566Q14 or its current replacement 8M0232583 against your engine serial number and the Mercury parts diagram before ordering. Mercury frequently updates belt specifications between production ranges.
Part Details
- Belt type: Multi-rib serpentine (poly-V) accessory drive belt
- System: Drives the alternator and belt-driven accessories from the crankshaft
- Supersession: 880566Q14 has been superseded by 8M0232583 — confirm which part number is current for your engine via the Mercury parts diagram
- OEM status: Genuine Mercury / Quicksilver — not aftermarket
Service Interval
Inspect the serpentine belt at every annual service or 100-hour interval. Mercury recommends replacement at the first sign of wear or at the interval specified in the Verado service manual for your engine. Replace immediately if any of the following are observed:
- Cracks between the ribs
- Fraying or missing rib material along the edges
- Glazing, hardening, or slipping under load
- Squealing or chirping noise at startup or under load
- Charging system warning or low battery voltage while running
Installation Notes
- Disconnect the battery before working on the accessory drive system.
- Note the belt routing before removal — photograph or refer to the Mercury service manual belt routing diagram.
- Inspect the belt tensioner and idler pulleys for wear, roughness, or play before installing the new belt.
- Route the new belt exactly as shown in the Mercury service manual routing diagram.
- After installation, reconnect the battery, start the engine, and verify correct belt tracking and charging system output.
Technical FAQ
Q: Is 880566Q14 still available, or should I order 8M0232583?
A: Mercury has superseded 880566Q14 with 8M0232583 as the current replacement. If 880566Q14 is in stock, it is the same application belt — but confirm the current part number for your engine via the Mercury parts diagram before ordering to ensure you receive the correct specification.
Q: What happens if the serpentine belt breaks on the water?
A: On Verado outboards, a broken serpentine belt will immediately stop alternator output, causing the battery to drain. Depending on the engine configuration, it may also affect other belt-driven accessories. The engine may continue to run briefly on battery power, but the boat should be returned to shore immediately. Carrying a spare belt is strongly recommended for offshore or extended trips.
Q: Do I need to replace the tensioner at the same time?
A: Not always, but it is good practice to inspect the tensioner and idler pulleys whenever the belt is replaced. If the tensioner shows any roughness, play, or noise, replacing it at the same time avoids a repeat service visit.
Parts Desk Insights
Best use case: This belt is the right choice for scheduled Verado accessory drive service or when a worn belt has been identified during inspection. It is most commonly ordered as part of an annual or 100-hour Verado service alongside spark plugs and gear oil. Carrying a spare belt on board is a practical precaution for Verado-powered boats used offshore or in remote areas.
Common issues: The most frequent issue is customers ordering by horsepower alone without confirming the serial number range — Verado engines of the same horsepower can use different belt lengths depending on production year and accessory configuration. Always confirm by serial number. A second common issue is installing a new belt without inspecting the tensioner and idler pulleys; a worn tensioner will shorten the life of the new belt significantly.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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