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Make your own flywheel puller

home made flywheel puller diy

When I first discovered that I'd ordered the wrong flywheel puller I had a brief fantasy of fabricating one of my own to get the job done.



I never could figure out a decent direction to go in and decided to give up on it for a while and just mow with the semi un-balanced blade.





Well some guy with an interesting blog named Ed had a bit more gumption than I did and almost made his own diy flywheel puller tool pictured here.

He reports the wood breaking before the flywheel came free, which is a bummer. The way he finally solved the problem was to take it to a local shop where they used the crude but effective hammer and screwdriver approach to pop it off.

I'm starting to wonder if anybody out there uses these flywheel puller tools for the basic small to medium lawn mower engine?



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I know that way back when I did small engine repair that I should have used a fly wheel puller but not having one I used a 3 jaw puller instead. Even with pressure on the puller I still had to smack the center bolt with a hammer to pop the fly wheel loose from the crankshaft. I've seen many small engine repair shops put wedges under the edge and again smack the side of the flywheel with a hammer to pop it off the crank. The jury is out. These little engines will take a lot off abuse and as long as you don't crack any of the parts (flywheel or crank case) you should be fine. The main idea is to use three points of contact as just two points will actually bind the flywheel even tighter to the shaft. What ever you do, never hit the crankshaft directly as this will ruin the threads, so you can't get the parts back together, unless you have a die or thread chaser to dress the threads. This is where a brass punch comes in handy. Really it's easier to do than it is to read or write about. I used to read a lot of engineering mags and a character in them could fix ANYTHING! His name was Marmaduke Surfaceblow. Marmaduke used Occam's Razor to fix everything. Maybe the spirit of Marmaduke is looking over your shoulder, giving you the backing you need to do the job well!

Comment by vester Tue May 25 16:26:39 2010
I think that's what Mark needs to do --- see it done a time or two. He's thinking of taking the mower into the shop to get a bit of professional help...
Comment by anna Tue May 25 20:54:46 2010