Sierra 18-7901 Marine Oil Filter, Replaces Mercury 825467T1 825467A1, Fits Yamaha 8HP 9.9HP (232cc) Outboards 1995-2000

The Sierra 18-7901 is a spin-on oil filter engineered for 4-cycle outboard engines, designed to trap contaminants while maintaining proper oil flow to protect internal engine components during operation. Constructed of steel, it uses high-efficiency filter media that meets or exceeds the filtration performance of the original equipment part it replaces, making it a dependable choice for routine oil changes and scheduled maintenance.

This filter is sized for the 8HP (232cc) outboard produced from 1995-2000 and the 9.9HP (232cc) outboard produced from 1995-1998, both of which use a 1.0L / 1.05 Qt oil fill with 10W-30 FC-W rated oil. It threads on with an M16 x 1.5 thread size and is a direct cross-reference for Mercury 825467T1 and 825467A1 filters, so it installs the same way as the original filter with no modification required. Each Sierra filter is manufactured to be interchangeable with the OEM part, giving boat owners a reliable aftermarket option for keeping their outboard's lubrication system clean.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7901
• Material: Steel
• Thread Size: M16 x 1.5
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.07 pounds
• Oil Capacity (8HP/9.9HP 232cc): 1.0L / 1.05 Qt
• Recommended Oil: 10W-30 FC-W
• UPC: 808282100827

Fitment

• 8HP (232cc) outboard, 1995-2000
• 9.9HP (232cc) outboard, 1995-1998

Replaces (OEM)

• 825467T1
• 825467A1

Frequently Asked Questions

What engines does the Sierra 18-7901 oil filter fit? It fits the 8HP (232cc) outboard built from 1995-2000 and the 9.9HP (232cc) outboard built from 1995-1998, both of which use a 1.0L / 1.05 Qt oil fill.

What OEM part numbers does the 18-7901 replace? The Sierra 18-7901 cross-references to Mercury 825467T1 and 825467A1, so it can be used as a direct replacement for either of those OEM filters.

What thread size does this oil filter use? The 18-7901 has an M16 x 1.5 thread size, matching the original filter it replaces.

What material is the Sierra 18-7901 made from? This filter is constructed of steel for a durable, leak-resistant housing.

How much oil does the engine need when I change this filter? For the 8HP and 9.9HP (232cc) outboards this filter fits, the oil capacity is 1.0L / 1.05 Qt using 10W-30 FC-W rated oil.

How much does the 18-7901 oil filter weigh? The Sierra 18-7901 weighs 0.07 pounds.

Is the Sierra 18-7901 a genuine OEM part or an aftermarket filter? The 18-7901 is a Sierra-manufactured filter built as a cross-reference replacement for Mercury 825467T1 and 825467A1, using filter media that meets or exceeds the original equipment part's filtration performance.

What are the dimensions of this oil filter? The Sierra 18-7901 measures 0.39 x 0.39 x 0.39 inches.

Does the 18-7901 fit larger outboards like a 15HP or 25HP? No, the 18-7901 is sized specifically for the 8HP and 9.9HP (232cc) outboards; larger displacement outboards use different Sierra filter part numbers.

What comes with the Sierra 18-7901? Each order includes one Sierra 18-7901 spin-on oil filter.

How do I know if my outboard uses the 232cc engine this filter is designed for? The 18-7901 is matched to the 232cc displacement 8HP (1995-2000) and 9.9HP (1995-1998) outboards; check your engine's displacement and model year against those specs before ordering.