Briggs and Stratton Engine Quick Oil Seal Replacement Guide

When you notice oil leaking from your Briggs & Stratton engine, especially around the crankshaft, it's likely time for oil seal replacement. A cracked or worn-out seal leaks oil, starves the engine of lubrication, and causes long-term engine damage. The good news is that oil seal replacement is an easy DIY job using the right tools and this guide.

In this short guide, we will take you step by step through replacing the oil seal in a Briggs and Stratton engine, detail the tools that you require, and the accessory parts that you should fit in the process.

Tools Needed

1. Oil seal puller or flathead screwdriver
2. Small hammer or rubber mallet
3. Socket or pipe of the same size as the new seal
4. Optional: Gasket sealant
5. Shop a rag or a towel

Step-by-Step Guide: Replacing Oil Seal

Inspect for Leaks

Inspect for obvious oil leaks around the crankshaft area, either on top (PTO side) or bottom (blade side). A leak usually means the oil seal is cracked or worn.

Remove the Old Seal

Remove the old seal using a seal puller or flathead screwdriver. Avoid scoring the engine block or crankshaft.

Clean the Area

Wipe clean the seal cavity and crankshaft using a rag. If there is apparent wear on the shaft, the installation of a repair sleeve may be necessary.

Apply Gasket Sealant (Optional)

Put a thin coat of sealant on the outside of the new oil seal to prevent future leaks.

Install the New Seal

Install the seal level and strike it level into place with a socket or pipe the same diameter as the seal. Never strike on the rubber.

Final Check

Check the seal level and flush with the surface. A twisted seal will cause immediate oil leakage when the engine is running.

Get the Right Parts for Your Briggs & Stratton Engine

Our website, Briggs and Stratton Lawn Mower Parts, carries a wide range of original and aftermarket replacement parts that can be installed on Briggs and Stratton engines. Whether you're just replacing a single seal or need to overhaul the entire engine, we've got you covered.

Last Thoughts

Replace the oil seal in a Briggs and Stratton engine without any hassle. The right tools and parts, along with some of the everyday tools you have in your workshop, can seal leaks, restore performance, and extend the life of your engine. Be sure to inspect other seals and gaskets while you are at it—time and money saved in the long run.