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⚙️ Keep your MerCruiser running smooth — because your engine deserves the best!
The Mercury 866340K01 oil filter delivers high-performance filtration specifically engineered for MerCruiser 4.5L and 6.2L sterndrive and inboard engines. Featuring advanced M-Pleated synthetic fiber media, it efficiently removes contaminants to extend engine life. Designed for easy replacement with common tools, this lightweight, durable filter is backed by Mercury’s decades of expertise, ensuring optimal fit, function, and reliability on the water.
| ASIN | B00AXYM1FU |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #11,663 in Automotive ( See Top 100 in Automotive ) #194 in Automotive Replacement Oil Filters |
| Brand | MERCURY |
| Brand Name | MERCURY |
| Compatible with Vehicle Type | Personal Watercraft |
| Customer Reviews | 4.7 out of 5 stars 626 Reviews |
| Item Dimensions | 5 x 5 x 5 inches |
| Item Weight | 12 ounces |
| Item dimensions L x W x H | 5 x 5 x 5 inches |
| Manufacturer | Mercury |
| Manufacturer Part Number | 35-866340K01 |
| Material | Paper, Steel |
| Material Type | Paper, Steel |
| Model Number | 35-866340K01 |
| Number of Items | 1 |
| Number of Packs | 1 |
| OEM Equivalent Part Number | 35-866340K01 |
| Part Interchange Info | Compatible with Mercury 866340K01, MerCruiser sterndrive and inboard engines, and GM engines (excluding V6 models with block-mounted filters). |
| Product Grade | Performance Part |
| Unit Count | 1 Count |
| Vehicle Service Type | Personal Watercraft |
S**E
Good filters, good price
The filters are exactly as expected.
H**B
Good OEM part.
This fit my 19 year old Mercruiser 5.7 liter 300 hp I/O just fine. I change it every year and the engine is still going strong.
F**1
Good deal
Fits 1997 4.3 mercruiser
C**A
The only filter to use on a mercury engine
Mercury oil filter. Received within one day as advertised
N**D
Only filter I use
Been using this filter for years. Fits my 2010 Discovery 195 well. Since I started winterizing the motor myself and using this filter, I have no problems with my boat. Runs well. Easy to install with the correct wrench.
T**Y
Great
as describe
B**.
Packaging
Is what I ordered packaging was terrible boxes holding product was all broken up
J**G
Did the job
Arrived fine. Fit. Seems to be working. I'm happy.
A**X
good
good
R**O
Fast Shipping
Fast shipping, great product and price.
B**.
Fits perfect
Perfect for the job !
E**S
OEM FILTER. As expected
OEM FILTER. As expected
T**5
Fit Perfectly on Mercruiser 3.0 TKS Boat Motor
I have a Bayliner 175 and I'll tell you that it is very frustrating that in the Mercruiser Manual for the 3.0 TKS Mercruiser 4CYL that they don't specify any replacement parts in the actual manual for doing service yourself, including the oil filter. Like everyone else these days they want you to take it for even basic service to someone who will charge you more. This filter definitely works on this motor, fit right on with no problems. As some other reviewers have mentioned, the box that it comes in wasn't exactly in the greatest shape when I received it but the filter itself was in good condition.
Trustpilot
2 days ago
2 weeks ago