Mercury Quicksilver — L6 Verado 300 Hour Service Kit — 8M0133617
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Mercury Quicksilver L6 Verado 300 Hour Service Kit — 8M0133617
This genuine OEM maintenance kit bundles the filters, ignition, cooling, belt, sealing, and corrosion-protection components needed to complete scheduled 300-hour service on select L6 Verado EFI FourStroke outboards, all in one package.
Compatible Applications
- L6 Verado EFI FourStroke, 200 HP
- L6 Verado EFI FourStroke, 225 HP
- L6 Verado EFI FourStroke, 250 HP
- L6 Verado EFI FourStroke, 275 HP
- L6 Verado EFI FourStroke, 300 HP
- L6 Verado EFI FourStroke, 350 HP (see fitment notice below)
Primary fitment is engine serial number 2B144123 and above. Confirm your engine's serial number in the owner's or service manual before ordering.
Serial Number Fitment Notice
Earlier L6 Verado engines through serial 2B144122 use a different 300-hour service kit. On applicable 350 HP engines, additional anodes beyond those supplied in this kit may be required.
Kit Contents
- Oil filter — 877769K01
- Low-pressure spin-on fuel filter — 8M0157616
- High-pressure fuel-filter screen
- Oil drain seal
- 2 gearcase drain seals
- 6 spark plugs
- Thermostat kit
- Water-pump impeller kit — 8M0065072
- Alternator belt — 880566Q14
- Anode kit — 8M0126671
Service Interval
Use this kit for the scheduled 300-hour maintenance service on applicable L6 Verado engines, or the equivalent major service per Mercury's maintenance schedule. Engine oil and gearcase lubricant are sold separately.
Installation Notes
Follow the owner's or service manual for the exact engine serial range. While the engine is open, inspect the water pump, thermostat housing, belt pulleys, and sealing surfaces.
Alternate/Related Part Numbers
- 8M0133617 — current kit with anodes
- 8M0149428 — related 300-hour L6 Verado kit without anodes
- Earlier engines through serial 2B144122 use different kits
Technical FAQ
What's the key serial cutoff for this kit?
2B144123. Engines below that serial range use a different 300-hour service kit.
Do all 350 HP engines only need what's in this kit?
Some 350 HP installations need additional anodes beyond what's included here, so check your engine's specific configuration.
Parts Desk Insights
Best use case: this kit covers the full scheduled 300-hour service on compatible L6 Verado FourStroke outboards in one package, saving the trouble of sourcing each service part separately.
Common mistake: ordering by horsepower alone. The engine serial number, not just the HP rating, determines whether this kit or an earlier-generation kit is correct.
Sizing and fitment guidance: if you are servicing a 350 HP L6 Verado, double check whether your engine needs anodes beyond what's included, and always confirm your serial number falls at or above 2B144123 before ordering.
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
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.