If you're looking for a new mower, you may notice that while there are a lot of different brands of mowers, lawn mower engines are typically made by one of a few companies. Most of the larger brands of lawnmowers use engines from one of these companies. Let's look at some of the most common ones.
Honda engines are used in many brands of lawnmower, particularly in riding mowers. Honda has been making small engines for a long time and they are typically quite reliable and efficient. Honda engines are serviced by almost all lawn mower dealers, which is one of their biggest advantages. You can get service almost anywhere for these engines.
Tecumseh engines are also quite popular. They're typically used in push-behind mowers, rather than riding mowers, and they're sized accordingly. Tecumseh engines are also widely supported, but of the three they probably have the smallest network of repair centers. That's not to say it's hard to get service, though. While it might be a smaller network, it's still very large.
Briggs & Stratton
Briggs & Stratton are another popular engine choice for push-behind mowers, and they're probably the most widely used engine in that style of lawnmower. They have also been making small engines for a long time, and have a lot of experience and expertise in the market.
It may seem strange that the engines are not actually made by the same manufacturer as the lawnmower itself, but when it comes right down to it, it works in your favor. Even if you buy a lesser-known brand of mower, if it uses one of these brands of engines you're going to be able to find repair centers for it almost anywhere.
And those repair centers and dealers can easily get parts since the engines use standard components. If you have a mower with an off-brand engine, you can run into trouble finding parts and service for it, especially once it's a few years old.
And if the company who made it ever goes out of business, you'll be pretty much on your own.