Camotokiit Oil Tank Fuel Filler Cap with Dipstick Assembly 828475A-1 for Mercury/Mariner 65–125HP — O‑Ring Seal, Snap‑Fit OE Repla

Camotokiit Oil Tank Fuel Filler Cap with Dipstick Assembly 828475A-1 is a snap‑fit direct replacement cap and dipstick designed to restore a secure, leak‑free oil tank opening on compatible Mercury/Mariner 65–125HP 2‑stroke outboards.

If your outboard’s oil tank cap is cracked, loose, or allowing seepage, this assembly returns a tight seal and a built‑in dipstick for quick oil level checks. The unit includes an o‑ring and installs without modification, matching OE fitment numbers including 828475A-1 and 828475A1. It’s offered as a straightforward swap to bring back reliable sealing and simple maintenance access for a range of Mercury/Mariner engine serials.

Which engines and serial ranges will this cap assembly fit?

This filler cap assembly is built for Mercury and Mariner 2‑stroke outboards from 65HP through 125HP with specific serial ranges. It covers both 3‑ and 4‑cylinder models across multiple production runs—see your engine’s serial range to confirm compatibility. If your part number matches 828475A-1 or any listed alternate, it’s intended as a direct replacement.

• Fits Mercury/Mariner 65–125HP 2‑stroke outboards
• Compatible with listed serial ranges for 65, 75, 80, 90, 100, 115, and 125HP models
• Replaces part numbers 828475A-1, 828475A1, 828793, 26318, 113161, 11-11316-1

How does installation work and what tools are required?

Installation is intended to be a simple snap‑in replacement with no special modifications. Remove the old cap assembly, verify the o‑ring seating area is clean, and press the new unit into place until it locks. Typical small hand tools or lubrication for the o‑ring may help, but no machining or wiring is needed.

• Remove old cap and inspect sealing surface
• Clean fitted area and lubricate o‑ring if needed
• Press new assembly into the tank opening until it snaps securely

What features should I expect from this replacement cap?

The assembly combines a fuel filler cap with an integrated dipstick and an o‑ring seal to reduce leaks and provide quick oil checks. It’s designed to match OE dimensions and function as a direct replacement, restoring original usability. Materials and construction aim for the durability demanded by marine environments, though routine inspection is recommended.

• Integrated dipstick for easy oil level reading
• Included o‑ring to prevent seepage and maintain a tight seal
• Snap‑fit, direct replacement design for quick swap‑outs

Will this cap prevent common oil tank issues?

Replacing a worn or damaged cap with a proper OEM‑fit assembly helps stop drips and external leakage caused by loose or degraded seals. While it addresses sealing and level‑checking, regular maintenance and correct installation are necessary to keep the tank system working reliably. For persistent leaks or internal damage, further inspection of the tank and mounting area is advised.

• Stops leaks from degraded caps and worn o‑rings
• Allows fast verification of oil levels via dipstick
• Supports routine maintenance and safe operation

Who is this for: Boaters, marine mechanics, and DIYers who own Mercury or Mariner 65–125HP 2‑stroke outboards and need a direct, no‑modify replacement for a faulty oil tank filler cap. It’s ideal if your engine’s serial numbers match the ranges provided and you want a quick restoration of a leak‑free oil tank opening with a built‑in dipstick for easier oil checks.

• Features: Oil tank fuel filler cap assembly, dipstick, o‑ring seal
• Part numbers: 828475A-1, 828475A1 (and listed alternates)
• Compatibility: Mercury/Mariner 65–125HP 2‑stroke outboards across multiple serial ranges
• Installation: Snap‑fit direct replacement; simple hand installation