Just got the 400 as a project and can't get it to start... Got a new battery for it put it in hit the start button and nothing happens. I pulled the spark plug and pulled it over with the rope and there is no spark. Need help!!

 

Some of the 400's had a problem with magnets coming loose from the stator. I have one with almost 4,000 miles, still ok. I think you need to at least inspect the stator and eliminate that. I believe some owners had success epoxying the magnets back in place. Download a parts manual from mymowerparts.com The AC PN for my 2002 is AC PN 3430-001. Could also be a fuse.

 

Like said before flywheel magnets was glued on to flywheel instesd of machined into flywheel big problem...Like said above need to check flywheel magnets and stator...

 

In my dyslexic confusion, I meant flywheel. I believe you can epoxy em back on, but should also test stator and cdi box. Could get expensive, or it could be a simple fix with epoxy. You need a special tool to remove the flywheel.

 

I think flywheel wont have to be removed magnets are pointing outward after case cover removed.Well on the ones I have done

 

You could also buy a replacement one on eBay, if you find loose magnets and don't feel lucky to do the re-epoxy. Some owners have high miles without an issue, too. Curious what you find.