Lower Unit Gasket Kit – Fits Tohatsu/Nissan 8-9.8 HP Outboards (Replaces 3B2-87321-0)

Lower Unit Gasket Kit – Fits Tohatsu/Nissan 8-9.8 HP Outboards (Replaces 3B2-87321-0)

This lower unit gasket kit is designed for a range of Tohatsu and Nissan 8 HP and 9.8 HP outboard motors. It provides the necessary seals and gaskets for servicing the lower gearcase unit on specific 2-stroke models from 2003 and 4-stroke models from 2004 to 2014.

This kit serves as a direct replacement for multiple OEM part numbers, including Tohatsu 3B2-87321-0, 3B2873210M, 3B2873211M, 3B2873213M, 3B2873214M, and 3B2873215M. It is also a cross-reference for Johnson/Evinrude part number 5040536.

• Complete Kit: Includes all necessary gaskets, o-rings, and seals for a lower unit service.
• Direct Replacement: Engineered to match OEM specifications for a precise fit and reliable seal.
• Warranty: Comes with a 1-year manufacturer warranty for peace of mind.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 3 x GASKET (332-60006-0)
• 1 x O-RING (345-65015-0)
• 1 x OIL SEAL (369-60111-0)
• 1 x GUIDE PLATE GASKET (3B2-65029-0)
• 1 x OIL SEAL (309-60111-0)
• 1 x PUMP CASE GASKET (LOWER) (3B2-65020-1)
• 1 x O-RING (369-66021-1)
• 1 x O-RING (332-66032-0)
• 1 x PUMP CASE GASKET (3B2-65018-0)

Installation Guide

1. Drain the Gearcase Oil: Position a drain pan under the lower unit and remove both the upper (vent) and lower (drain) screws to drain the oil completely.
2. Disconnect Shift Linkage: If necessary, disconnect the shift linkage rod to allow the lower unit to separate from the engine.
3. Remove Mounting Bolts: Loosen and remove the bolts securing the lower unit to the outboard's midsection. Keep track of bolt lengths and locations.
4. Detach Lower Unit: Carefully lower the gearcase away from the engine. It may require a gentle tap with a rubber mallet to break the seal.
5. Remove Old Gaskets & Seals: Identify and remove the old gaskets, seals, and O-rings that are included in your new kit. Pay close attention to the water pump housing area.
6. Clean Mating Surfaces: Thoroughly clean all mating surfaces to remove old gasket material, corrosion, and debris. A clean surface is crucial for a proper seal.
7. Install New Components: Carefully install the new gaskets, oil seals, and O-rings from the kit in their correct locations. Lightly oil seals before installation.
8. Reassemble: Re-attach the lower unit to the engine, ensuring the driveshaft, water tube, and shift shaft align correctly.
9. Tighten Bolts: Reinstall the mounting bolts and tighten them to the manufacturer's recommended torque specifications in the correct sequence.
10. Refill Gear Oil: Fill the gearcase with fresh marine gear lubricant through the lower drain hole until it flows out of the upper vent hole. Reinstall and tighten both screws.

Troubleshooting & FAQ

Q: How do I confirm this gasket kit fits my specific engine?
A: The best way to ensure compatibility is to match your engine's model and year against the "Compatible Engine Models" table on this page. You can also verify by cross-referencing your existing part number with the numbers listed in the "Part Number Cross-Reference" table. This kit fits specific Tohatsu and Nissan 8 HP and 9.8 HP models.

Q: What are the signs that my lower unit gaskets need replacement?
A: Common signs include milky or creamy-looking gear oil (indicating water intrusion), visible oil leaks around the gearcase seams or propeller shaft, or a persistent need to top off the gear lube. Water in the gearcase can lead to catastrophic failure if not addressed.

Q: Is this a complete kit for servicing the lower unit?
A: This kit contains all the primary gaskets, seals, and O-rings needed for a standard lower unit re-seal, particularly around the water pump and gearcase mating surfaces. However, it does not include other components like water pump impeller or housing, which may be serviced at the same time.

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.