Sierra 18-2016 Oil Seal for Evinrude Outboard Motors, Replaces OMC 313992 and Mercury Marine 26-41953

The Sierra 18-2016 Oil Seal is a direct-fit replacement oil seal engineered for Evinrude outboard motors, covering a wide range of horsepower ratings from 85 hp through 110 hp across multiple serial number ranges and cylinder configurations (3-cylinder, 4-cylinder, and 6-cylinder blocks). This seal is a wear item that keeps gear case and powerhead lubricants contained while blocking water intrusion at the shaft, protecting internal components from corrosion and premature failure. It is built from a glass-filled seal material for durability in a marine environment, with a green-brown finish. The seal measures 5 x 4 x 1 inches as packaged and weighs 0.04 pounds, making it a small, precision-fit component rather than a bulk part. Because Evinrude used many serial number breakpoints across the 85-110 hp model years, buyers should confirm their engine's serial number against the ranges listed below before ordering to ensure correct fitment, including the two distinct upper O-ring configurations (round vs. Square) used on later 100 hp four-cylinder units. Sierra 18-2016 cross-references directly to Mercury Marine 26-41953 and OMC 313992, so it is a suitable replacement wherever either of those part numbers is called for.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2016
• Product Type: Oil Seal
• Material: Glass
• Color: Green Brown
• Item Dimensions: 5 x 4 x 1 inches
• Weight: 0.04 pounds
• UPC: 030999309624
• Quantity: 1 per pack
• OEM Cross Reference: Mercury Marine 26-41953, OMC 313992

Fitment

• 85 hp (850), 6-cylinder, serial 1460999-1464848
• 85 hp (850), 6-cylinder, serial 1566240-1766823
• 85 hp (850), 4-cylinder, serial 3493913-4831998
• 90 hp (900), 6-cylinder, serial 1766824-1869775
• 90 hp (90, 900), 6-cylinder, serial 4845301 and up
• 90 hp, 3-cylinder, serial A996142-B240450
• 90 hp, 3-cylinder, serial B240451-C221999
• 90 hp, 3-cylinder, serial C222000 and up
• 95 hp (950), 6-cylinder, serial 1869776-2318585
• 100 hp (1000), 6-cylinder, serial 1464949-2318585
• 100 hp (1000SS), 6-cylinder, serial 2318586-2413847
• 100 hp (1000SS), 6-cylinder, serial 2484633-2836018
• 100 hp (1000BP), 6-cylinder, serial 2399698-2641854
• 100 hp (1000BP), 6-cylinder, serial 2641855-3253111
• 100 hp, 4-cylinder, serial B209468-G760299
• 100 hp, 4-cylinder with round upper O-ring, serial G760300 and up
• 100 hp, 4-cylinder with square upper O-ring, serial G760300 and up
• 110 hp (1100), serial 1870201-2314955

Replaces (OEM)

• Mercury Marine 26-41953
• OMC 313992

Frequently Asked Questions

What does the Sierra 18-2016 oil seal fit? The Sierra 18-2016 fits Evinrude outboard motors from 85 hp through 110 hp, spanning 3-cylinder, 4-cylinder, and 6-cylinder engine blocks across specific serial number ranges, so confirming your engine's serial number against the listed ranges is the best way to verify fitment.

Is Sierra 18-2016 the same as Mercury 26-41953? Yes, Sierra 18-2016 cross-references directly to Mercury Marine 26-41953, so it can be used as a replacement wherever that Mercury number is specified.

Does 18-2016 replace OMC 313992? It does. OMC 313992 is a direct cross-reference to the Sierra 18-2016 oil seal, making it a suitable substitute for that OMC part number.

What are the dimensions of this oil seal? The Sierra 18-2016 oil seal measures 5 x 4 x 1 inches and weighs 0.04 pounds.

What material is the Sierra 18-2016 seal made from? This oil seal is made from a glass-based seal material and has a green-brown finish typical of Sierra's oil seal line.

How many seals come in a pack? The Sierra 18-2016 is sold as a single oil seal, one unit per pack.

My 100 hp Evinrude has serial number G760300, which upper O-ring version do I need? Evinrude 100 hp four-cylinder engines with serial number G760300 and up were built with either a round upper O-ring or a square upper O-ring configuration; you will need to identify which O-ring style your engine uses to pair the Sierra 18-2016 seal correctly, since both configurations reference this same part number.

Is this a genuine Sierra part or an aftermarket copy? The 18-2016 is a genuine Sierra-branded oil seal, manufactured to the same specification as the OEM Mercury Marine 26-41953 and OMC 313992 seals it replaces.

What is included when I order this seal? Ordering the Sierra 18-2016 includes one oil seal; it does not include gaskets, O-rings, or other gear case hardware unless separately listed.

Why are there multiple serial number ranges listed for the same part number? Evinrude revised internal components across production, so the Sierra 18-2016 oil seal was specified for several distinct serial number breakpoints on the 85 hp through 110 hp engines even though the seal itself carries one part number.

Does 18-2016 work on 3-cylinder 90 hp Evinrude motors? Yes, the Sierra 18-2016 covers 3-cylinder 90 hp Evinrude engines across serial ranges A996142-B240450, B240451-C221999, and C222000 and up.

Will this seal fit a 110 hp Evinrude? The Sierra 18-2016 fits the 110 hp (1100) Evinrude within serial number range 1870201-2314955.