$30 Mower

Tuesday, 15 March 2011

Last week i bought a lawnmower on craigslist for $30. It runs, which means it is already better off than the old Snapper riding mower i bought last year. It can also mulch or attach a bag to collect the grass clippings. The one downside is that it isn't self propelled. That's not a huge deal because i will only be using this to mow in tight corners where i can't get with the riding mower.

So i got it home, cleaned it, sharpened the blade, sprayed it with WD-40 and then oiled everything. The motor is a Briggs & Straton just like the Snapper mower. It's 5hp and seems to run well.

One problem it had was the throttle cable was jammed. Apparently the last owner figured the way to un-jam it was to pull so hard on the handle that it snapped off. So i removed the cable and tried everything to loosen it. After about 30 minutes of bending the cable and twisting the wire it finally freed up.

Now i had to fix the broken throttle handle. First i thought of just cutting a piece of aluminum and bolting it on to where the original had snapped off. But then i noticed an old bicycle tire quick release. I ground off the rivet and the new handle fit perfectly around the broken plastic dial.

One bolt and nut was all it took. Simple and strong.

It almost looks like it was meant to be there.

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Exhausted

Thursday, 9 September 2010

Only a small rusted exhaust came with the mower motor. It's really loud and might anger neighbors, so i tried making a new, quieter one.

There's many types of exhaust styles. There are high-tech noise cancellation mufflers, but the one i chose, which was also the simplest to make was just a straight baffled design. That's where the inner pipe is drilled out and insulation is wrapped between that and the outer shell.

Here's an example of the basic ideas i tried to follow
After removing the old exhaust i connected steel plumbing pipes.

Here's what the inner pipe looked like after i drilled out the holes
Then wrapped it with steel wool and fiber glass

Here it is on the mower. I'm still working on it because it's still pretty loud.

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