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TonGass (20-Pack, Black) Exact Replacement for Yamaha 90430-08020-00 & 90430-08003-00 - Lower Gear Case Oil Drain Gaskets - Japanese Hard Fiberboard Gaskets - Fits for Yamaha 4-Stroke Outboard Motors

4.5 (13) Write Review
Free shipping on orders over $29.99

$7.49

$ 3 .99 $3.99

In Stock

1.Model:20pk-black


About this item

  • EXACT REPLACEMENT FOR YAMAHA 90430-08020-00 & 90430-08003-00 - These gaskets are an exact replacement for Yamaha part number 90430-08020-00. Alternative part numbers include 90430-08003-00, 90430-08003, 90430-08801-00, and 604-45342-00-00 (superseded by 90430-08003-00). These part numbers have the same specifications and make, having a 5/16 inch (8mm) interior diameter.
  • LOWER GEARCASE OIL DRAIN GASKETS - Sometimes changing lower unit oil several times per season also means changing gaskets - or losing them. Don’t let leaks stop you. Always have several lower unit gaskets on hand. Our 20-pack lower gear case oil drain plug gaskets will have your back.
  • JAPANESE HARD FIBERBOARD GASKETS - Made from hard and watertight materials, these black fiber gaskets are hard yet lightweight. They are durable and compresses at the same rate as OEM gaskets, creating the perfect seal. Similar to other fiber gaskets, these gaskets are also resistant to oils, preventing oil leaks that will eventually cause the entry of water.
  • FITS FOR YAMAHA 4-STROKE OUTBOARD MOTORS - These gaskets are almost universally compatible with Yamaha’s 4-stroke outboard motor models, but they’re also compatible with several older models and other parts of the motor. Compatible with Yamaha models include Outboard 150HP F150LCA 2019 and Outboard 175HP F175XCA 2020.
  • RELIABLE AFTERMARKET REPLACEMENT PARTS BY TONGASS - Our line of aftermarket replacement parts meets and even exceeds OEM specifications for quality and durability. You can count on our reliable aftermarket replacement lower unit gaskets to provide an excellent seal for longer.


Product Description

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James Beasley
August 2, 2025
perfect fit
Happy Camper
July 30, 2025
These work fine on my Yamaha 20hp 4 stroke outboard. I was in a bind and went to the Yamaha dealer to get 2 of these. They were $16 for two! Ordered these and they are suitable for a fraction of the price.
J. G.
June 29, 2025
I change the lower unit oil every year on my 1999 Mercury 175hp outboard. These work very well with no problems.
Jeda
June 26, 2025
Perfecto para mi Yamaha 115
Limboe Jimboe
June 13, 2025
I have 1996 115HP Yamaha 2 stroke. 12 the gaskets look be correct size the other 12 are larger and may fit a 4 stroke motor no way correct size for my lower unit. But was good price and 12 gaskets will last a few summers, as I use my boat commercially crab Potting.
DurangoKidd
June 5, 2025
I used to order these from a marine supply company and buy a couple at a time. For the previous cost of two I got ten years worth.
william h crase
May 11, 2025
Good
Dustin Owens
May 2, 2025
These DO NOT WORK!!! Went out on the lake once after changing the lower gear oil and using these on the screws. Went to get the boat today and saw oil residue and wetness around the upper and lower screws. Now I have to pay for more lower gear oil and find some OEM gaskets. Hopefully nothing is messed up internally but I guess I’ll find that out at a later date. Would NOT RECOMMEND!
Natali castillo
April 26, 2025
Vale lo q pagas
Sean
February 27, 2025
These work as well as the original Yamaha gaskets I've used. One purchase should last a few lifetimes.
Meecham88
February 13, 2025
For my small suzuki outboard.
A. Pye
December 29, 2024
Works as they should, great price fast shipping
Guy
November 15, 2024
Bonne qualité et s’ajuste parfaitement pour mon hors bord mercury