Back to catalogue
Gaskets (Tohatsu)

Gearcase Plug Gasket 3B7-60016-1 – 10.1 × 15 × 1mm

Brand: Tohatsu

SKU: 3B7-60016-1

$3.85
Request a quote

The Genuine Tohatsu 3B7-60016-1 Gearcase Plug Gasket is designed for selected 2-stroke and TLDI outboard motors. Measuring 10.1mm inside diameter, 15mm outside diameter and 1mm thick, this genuine OEM sealing washer fits the specified M10 gearcase plug. It helps prevent water ingress and oil leakage around the plug opening. Ideal for lower-unit servicing, gearbox maintenance and replacing worn, compressed or damaged sealing gaskets.

Key benefits

Key Benefits

  • - Genuine Tohatsu OEM replacement gasket.
  • - Precision dimensions of 10.1 × 15 × 1 mm.
  • - Designed for the specified M10 gearcase plug.
  • - Helps prevent gearcase oil leakage.
  • - Helps protect against water entering the gearbox.
  • - Suitable for selected conventional 2-stroke and TLDI outboards.
  • - Replaces earlier OEM gasket 3B7-60016-0.
  • - Ideal for lower-unit repairs and maintenance.
  • - Supplied individually.

Specifications & Dimensions

  • - Manufacturer: Tohatsu
  • - OEM Part Number: 3B7-60016-1
  • - OEM Ordering Number: 3B7600161M
  • - OEM Description: Gasket 10.1-15-1
  • - Product Type: Gearcase plug sealing gasket
  • - Inside Diameter: 10.1 mm (0.398")
  • - Outside Diameter: 15 mm (0.591")
  • - Thickness: 1 mm (0.039")
  • - Shape: Flat circular sealing washer
  • - Compatible Plug Thread: M10 × 1.25 on documented applications
  • - Installation Location: Lower-unit gearcase plug
  • - Material: Sealing gasket material
  • - Typical Quantity Required: 1 per applicable gearcase assembly

Compatible Tohatsu Outboards

  • Conventional 2-Stroke Outboards
  • - M50D2 – 50HP: Documented 2003 parts application.
  • - M60C – 60HP: Selected gearcase configurations.
  • - M70C – 70HP: Documented 2018 gearcase application.
  • - M70CX – 70HP: Documented 2016 gearcase application.
  • - M90A2 – 90HP: Documented 2014–2015 factory catalogues.
  • - M115A2 – 115HP: Documented 2003 application.

TLDI Direct-Injection Outboards

  • - MD40B – 40HP: Selected factory gearcase configuration.
  • - MD50B – 50HP: Documented 2006 application.
  • - MD70B – 70HP: Listed in the 2006 factory model-family catalogue.
  • - MD90B – 90HP: Listed in the 2006 factory model-family catalogue.
  • - MD115A2 – 115HP: Listed in the 2013 factory parts catalogue.

Cross-Reference & Replacement Part Numbers

  • Genuine Tohatsu OEM
  • - 3B7-60016-1 – Current genuine gearcase plug gasket.
  • - 3B7600161M – Current OEM ordering number.
  • - 3B7-60016-0 – Previous OEM gasket, superseded.
  • - 3B7600160M – Previous ordering number, replaced by 3B7600161M.

Signs the Gearcase Plug Gasket Needs Replacing

  • - Water leakage around the gearcase plug.
  • - Gasket is flattened or permanently compressed.
  • - Cracked, torn or deteriorated gasket material.
  • - Corrosion around the plug sealing surface.
  • - Visible damage after plug removal.
  • - Gasket no longer seals correctly.
  • - Gasket is missing or incorrectly fitted.
  • - Plug has been removed during lower-unit maintenance.

Important Fitment Information

  • - Confirm the exact outboard model and serial number before ordering.
  • - This is a genuine Tohatsu OEM gasket, not an aftermarket replacement.
  • - Inside Diameter: 10.1 mm.
  • - Outside Diameter: 15 mm.
  • - Thickness: 1 mm.
  • - Designed for the specified M10 × 1.25 gearcase water plug.
  • - Not intended as a substitute for the smaller 8.1mm gearbox oil drain plug gasket.
  • - The current part number 3B7-60016-1 replaces 3B7-60016-0.
  • - Inspect the plug and mating surface for damage or corrosion.
  • - Clean the sealing surface before installing the replacement gasket.
  • - Tighten the plug according to the manufacturer's service instructions.
  • - Replace damaged sealing gaskets rather than reusing them.

Shipping

Ships Australia-wide