Is your push lawn mower bogging down when you get into thick grass or when you mow a little faster?
If so, it could be an engine problem or you could be mowing more than you should. Waiting to mow tall grass is not good for a lawn mower with a small engine and will bog it down.
But if your grass is relatively short, your mower should power right through it and not bog down. If it does, you could have a problem with the engine or your deck could be clogged with grass and have a dull lawn mower blade.
The first thing to check would be the lawn mower blade and deck. Make sure your deck is clean and you blade is fairly sharp.
If everything is fine in that area, your carburetor or fuel system may be causing you the problem with low power. The governor may also set incorrectly. These are problems that you can check out yourself or if you need a professional lawn mower repair mechanic, visit our Locations page for a small engine repair shop near you.