Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Help with replacing mower blade

phattspatt's Avatar

Join Date: Nov 2005
Posts: 71

06-17-07, 06:24 AM   #1  
Help with replacing mower blade

Hi All,

I am a complete n00bwhen it comes to this. I have a replacement mulching blade for a Snapper mower. I can't remove the old blade, ~5 years old, because I can't turn the bolt, which I am assuming is reverse threaded based on how the blade would spin. I don't have the instruction book for the mower.

I even bought a cheap wrench/ratchet set from costco and pounded on it for 15 min with a wrench/hammer and ratchet/hammer, but it doesn't budge. Does anyone have any advice??

Thanks for your help.

Sponsored Links
Wirepuller38's Avatar

Join Date: Feb 2006
Posts: 6,188

06-17-07, 04:45 PM   #2  

Have you tried to turn the bolt in the opposite direction?

jmnew51's Avatar

Join Date: Apr 2007
Posts: 408

06-17-07, 06:53 PM   #3  
The nut/bolt may be reversed in reference to the blade rotation, but not always. You need to be 100% certain wether it is a right or left hand thread before attempting to apply extreme force to the component.

Normally pounding on a cheap wrench will not give the same effect as a true slug wrench. There's just too much flex (cheap steel) and sometimes the fit is too sloppy.

Never hit a ratchet like a slug wrench...that never works.

Your best bet is to brace the blade as solidly as possible (in a strong vise maybe), and try again with a good quality wrench with a short extension on it.


Do you know anyone with an impact wrench?

Is this a bolt and not a nut?



Join Date: Mar 2007
Posts: 354

06-18-07, 05:04 PM   #4  
Most blades were tightened to approximately 50 foot pounds of torque. As you look at the blade bolt head, you should be turning counter clockwise. Wedge a 2x4 so the blade can not move and you might have to get a breaker bar and a good correct size socket, probably in a 1/2 inch drive size.

puey61's Avatar

Join Date: Apr 2004
Posts: 3,224

06-18-07, 06:00 PM   #5  
Or, it may be so stubborn that you may need the advantage of compressed air and a 1/2 inch pneumatic impact wrench. You probably have a good local, small business auto repair shop that would be willing to lend a hand and remove the bolt for you. It will be a standard right-hand thread whereas a CCW rotation will remove it.

phattspatt's Avatar

Join Date: Nov 2005
Posts: 71

06-18-07, 06:37 PM   #6  
Great, I ended up getting it off, i soaked in WD-40 as much as I could overnight, dunno if that did anything, but the vice/brace helped get a better angle and it loosened after another 10 min.


Search this Thread