Sierra 18-7914 Oil Filter, Replaces Mercury 35-822626Q2/Q04/K04, Fits Mercury 25-90 HP Outboards

The Sierra 18-7914 is a spin-on oil filter built for Mercury outboard engines, designed to trap contaminants in the engine oil while maintaining proper oil flow to protect internal components. It is constructed from cellulose and steel and uses a 20mm x 1.5 thread, allowing it to thread directly onto the factory oil filter mount without adapters. Each Sierra product meets or exceeds the original equipment part it replaces, making it a direct drop-in for routine oil changes and maintenance on covered Mercury outboards.

The 18-7914 covers a wide range of Mercury outboard horsepower classes, from 25 HP through 90 HP, spanning multiple engine configurations including 3-cylinder and 4-cylinder blocks and both carbureted and EFI setups. Because coverage varies by serial number break and model year, boaters should confirm their engine's horsepower, configuration, and serial number range against the fitment list before ordering to ensure they receive the correct filter for their outboard.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7914
• Product Type: Oil Filter
• Material: Cellulose, Steel
• Thread Spec: 20mm x 1.5
• Outside Diameter: 20 millimeters
• Item Dimensions: 3.7 x 3.2 x 3.2 inches
• Weight: 0.58 pounds
• Quantity: 1 filter

Fitment

• Mercury 25 HP (0T800999 and lower), 1998-2006
• Mercury 30 HP (0T800999 and lower), 1999-2006
• Mercury 40 HP (3 cylinder), 1999-2011
• Mercury 40 HP (4 cylinder), 2001-2011
• Mercury 50 HP (996cc), 2001-2011
• Mercury 50 HP (935cc), 1995-2000
• Mercury 60 HP, 2001-2011
• Mercury 75 HP Carbureted, 2000-2005
• Mercury 75 HP EFI (1B366822 and below), 1999-2006
• Mercury 80 HP, 2006-UP
• Mercury 90 HP Carbureted, 2000-2005
• Mercury 90 HP EFI (1B366822 and below), 1999-2006

Replaces (OEM)

• Mercury Marine 35-822626Q2
• Mercury Marine 35-822626Q04
• Mercury Marine 35-822626K04

Frequently Asked Questions

What Mercury outboards does the Sierra 18-7914 oil filter fit? The Sierra 18-7914 fits Mercury outboards from 25 HP through 90 HP, covering configurations such as 25 HP (0T800999 and lower, 1998-2006), 30 HP (0T800999 and lower, 1999-2006), 40 HP 3-cylinder (1999-2011) and 4-cylinder (2001-2011), 50 HP 996cc (2001-2011) and 935cc (1995-2000), 60 HP (2001-2011), 75 HP Carbureted (2000-2005) and EFI 1B366822 and below (1999-2006), 80 HP (2006-UP), and 90 HP Carbureted (2000-2005) and EFI 1B366822 and below (1999-2006).

Is the Sierra 18-7914 a direct replacement for the Mercury OEM filter? Yes, the 18-7914 is a direct cross-reference for Mercury Marine 35-822626Q2, 35-822626Q04, and 35-822626K04, and Sierra states each filter meets or exceeds the original equipment part it replaces.

What thread size does the 18-7914 oil filter use? It uses a 20mm x 1.5 thread with a 20 millimeter outside diameter, so it threads directly onto the factory oil filter mount on covered Mercury outboards.

What is the Sierra 18-7914 filter made of? The 18-7914 is made of cellulose and steel, a standard spin-on oil filter construction with a cellulose filtering media inside a steel canister.

How much does the Sierra 18-7914 oil filter weigh? The Sierra 18-7914 weighs 0.58 pounds.

What are the dimensions of the Sierra 18-7914 oil filter? The 18-7914 measures 3.7 x 3.2 x 3.2 inches.

Does a 75 HP or 90 HP Mercury outboard always use the 18-7914? Not always; the 18-7914 fits 75 HP and 90 HP Carbureted models (2000-2005) and 75 HP and 90 HP EFI models built 1B366822 and below (1999-2006), but 75 HP EFI units built 1B366822 and above use a different Sierra filter, so the serial number should be checked before ordering.

How many oil filters come in the package? One Sierra 18-7914 oil filter is included per package.

Can I use the 18-7914 on a 25 HP or 30 HP Mercury with a higher serial number? No, the 18-7914 covers 25 HP and 30 HP Mercury outboards only in the 0T800999 and lower serial range; engines with serial number 0T801000 and up use a different Sierra filter.

Is Sierra an aftermarket or genuine OEM brand? The 18-7914 is a Sierra-brand aftermarket filter engineered to cross-reference and perform to the same standard as the Mercury Marine 35-822626Q2, 35-822626Q04, and 35-822626K04 OEM filters it replaces.