Learn how to tune up a Craftsman M100 lawn mower. Easy to follow steps to get your mower running like new again.

Air Filter no. 799579: https://amzn.to/3d1P7Ne
Spark plug RC12YC: https://amzn.to/3vz5bN3
SAE 30 motor oil: https://amzn.to/3cXHYxy
Tri-Flow Superior Lubricant: https://amzn.to/3BCAfzh

00:00 I'm not Red
00:44 Drain fuel
01:58 Replace air filter
05:55 Spark plug check and gap
08:07 Oil change
10:15 Lubricate wheels and cable
11:20 The money shot

The tools I like and use most often:
Magnetic spark plug socket set: https://amzn.to/3CzmpvO
Tachometer: https://amzn.to/3sHibiH
Vessel Megadora JIS screwdriver set: https://amzn.to/363RFqO
Channellock Bent Needle-nose pliers: https://amzn.to/3I5DbnA
Long 1/4 Quick-connect Torx Driver Bits: https://amzn.to/3HUNgnm
Spark Tester: https://amzn.to/3CxW2qi
OTC Leak-down Test Kit: https://amzn.to/3CyUhJn
Compression Tester: https://amzn.to/3IWd6sp

Wear your safety glasses, or you'll shoot your eye out. Try on some gloves. Take off that spark plug boot. Clean your room. Open the windows, those fumes are nasty. Just 'cause I do it, don't think it's the end all, be all solution. There's plenty more ideas out there, I can't take responsibility if you slice off a few fingers after watching my videos. And don't just pour that toxic stuff down the sewer or in the ditch, dispose of waste responsibly. Just be safe, OK?

Follow along with me elsewhere:
  / thelawnmowerlady  
https://the-lawnmower-lady.blogspot.com/

Titles, opening graphics, and music by AbleVFX.

Any links to products are likely affiliate links, and I may earn a small commission from qualifying purchases (Thank You!), with no additional costs to you.

Disclaimer: The content of this video is purely for my entertainment, and is available to you for informational and educational purposes only. It's not substitute advice from small engine mechanics with professional training and certifications, nor does it create any kind of relationship between the The Lawnmower Lady and you. Your situation may be different, and the The Lawnmower Lady makes no warranties, express or implied, as to the fit, accuracy, or applicability of the information shown in this video, and implies no guarantee of results. The Lawnmower Lady and any sponsors of this video are not liable for any damages of personal injury, property damage or loss of any kind that may result from the use or reliance on this video and/or any parts and procedures represented in this video. You are using the information presented in this video solely at your own risk.

#craftsman #m100 #lawnmower #smallenginerepair #DIY