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Does your push mower have no compression and won’t start? In this video, we walk through a complete diagnostic and repair process for a Briggs & Stratton 550EX engine that spins freely, has no resistance, or causes the pull cord to kick back.

If your mower pull cord spins too easily, jerks back, or the engine won’t start, this step-by-step guide will help you identify and fix the problem. This video covers:

How to test for compression loss

How to check and replace the flywheel key

How to remove the flywheel safely

Valve adjustment (valve lash) on a Briggs & Stratton engine

Why incorrect valve spacing causes hard starts or kickback

What the compression release bump is and how to check it

Signs of deeper engine damage (vertical scoring)

When it’s time to replace the engine instead of repairing it

Even though we ultimately had to swap the engine due to internal wear, this video will help anyone trying to fix no compression issues on a Briggs & Stratton push mower engine. Whether you’re dealing with a hard-starting mower, no resistance on the pull cord, or unusual kickback, you’ll learn what to check and how to fix it.

For a video where we stake a valve for head repair see
John Deere L108 Won’t Start, Just Pops Ful...

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Don’t forget to like, comment, and subscribe for more lawn mower repair tips, troubleshooting guides, and DIY small engine fixes to keep your equipment working smoothly!

Save some money by doing it yourself!

About Us:
My name is Martin. I have been repairing tools and small engines for almost 20 years. We operate a small engine repair shop in Illinois. We service / repair Briggs & Stratton, Kohler, Kawasaki, John Deere, Cub Cadet, Toro Tecumseh, Loncin, Honda, Craftsman, Husqvarna, MTD, Troy Bilt, Simplicity, John Deere, Exmark, LCT, Generac and many more brands. We work on riding mowers, walk behind mowers, snow blowers, zero turns, generators, pressure washers and much more. We normally repair about 3,000 pieces of equipment every year and look at many more that are beyond an affordable repair. Hopefully our videos will save you some money and give you the information you need to work on your own equipment or figure out the issue at hand.

Disclaimer: Links included in the description are affiliate links. As an Ebay & Amazon associate we earn from qualifying purchases. There will be no additional charge to you for purchasing here. We appreciate your support, which allows us to continue to provide original content!

Please be careful when repairing any piece of equipment and follow all possible safety measures. This video is for entertainment purposes only.

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