How to Service Your Lawn Mower – Basic Engine Service & Blade Sharpening

How to Service Your Lawn Mower – Basic Engine Service & Blade Sharpening


Alright so today on Repairs101 I need to throw
a quick service at my old lawn mower and so while I�m at it I�m going to pull the
blade, sharpen it and check it for balance. I bought this mower at Walmart back in the
Y2K for about a hundred and twenty-five dollars. OK so the first thing you want to do is to
remove the spark plug so it cannot possibly start. Take some Brake Clean to the area around
the crankcase�s oil filler port. Remove the sump plug and drop the oil. After that,
tip it on its side so that the carburetor is pointing up. Then put the drain plug back
in and clean it up to your taste. Me, I�m not going to be too fussy about it. I may
have to paint it next time. I know not everyone has access to a bench
grinder so I�m going to do this one in my vise. You don�t want to spend too much time
fixing one of these blades up, considering it�s only about twenty dollars for a new
one. Get it as clean as you possibly can and protect it with some oil.
This one has a few nicks in it but I can file it back with a single cut file to get rid
of most
of the problem. I�ll do fifty strokes on each side and then check it for balance by
hanging it on the end of a screwdriver. It�s a little heavy on the left so I�ll just
file a little material off the end and check it again.
Make sure you know which side is which before you bolt it back on. I like to use a little
Never-Seez on the bolt and on the flange face. When divided by twelve: that�s fifty foot
pounds maximum torque. Now is a good time to finish cleaning up the
motor. Too much dirt will insulate it and make it run hot. Rinse out the air filter
with a solvent or cut a new one with a synthetic sponge.
Now, if there�s no dipstick, like on this one � you�ve got to fill the oil to land
in the range between the bottom of the thread cut-out and the top of the thread cut-out.
This is the original spark plug and it�s already seen fourteen seasons of mowing � so
obviously I�m going for the record! Check the spark plug gap before reinstalling it.
Happy mowing! Alright thanks for watching and don�t forget
to subscribe!

9 thoughts on “How to Service Your Lawn Mower – Basic Engine Service & Blade Sharpening

  • Learned a lot within 3 minutes of this video. One question though: would you use 5W30 Synthetic instead of SAE30 oil for this lawnmower. Thanks for your help in the matter.

  • Thank you for the video, my grandfather has had his lawn mower for 25 years, he never changed the oil or spark plug since it was new, so today for the first time in its life, I changed the spark plug and oil and boy the oil smelt so bad I almost puked, and the spark plug was so fouled I was surprised it had been running all of these years, so I put a new plug in and I changed the oil with 10w30 even though it recommended sae 30, and boy does it sound so much better lol, I even sharpened the blade and made it balance and it cuts so much smoother

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