BILT HARD Gas Engine Vertical Shaft, 173cc 4.4 HP 4-Stroke Gas Motor, Replacement Engine for Lawn Mower, EPA & CARB Compliant

I replace a briggs and stratton motor on a 20" push mower, using the one tapped hole and enclosed bolt, then tapped two other holes 3/8" x 16 to reuse original mounting bolts. i removed keyway that was on the shaft and old blade adapter and bolt worked perfectly. The original brake cable fit and worked perfectly. I bought an $8 throttle cable and installed it to complete the switch over. The engine holds 1/2 qt of engine oil. When checking oil using dipstick, be sure to read instructions. You check engine oil with the dipstick without screwing it into the engine. I filled with gas, pushed primer button twice, and engine started effortlessly with first pull and runs smooth and quiet. It has much more power than the briggs motor I removed. After running engine for 5 minutes or so, I changed the oil. Note you must flip mower upside down to drain oil, there is no drain plug. So far I am very impressed with this little motor.

Purchased this to replace a worn out Briggs and Stratton. Had to drill one hole for the different mounting location and remove the muffler cover but I could not be happier. Starts on the first pull every time and runs great even at low idle. It turned out much better than I hoped.

have had it over a year and doing good. used mobile one oil. used it for my log splitter

I have to say that this little engine works great. I got this to replace my weak 2.70 HP engine on my push mower and I wasn't disappointed. It runs smooth and it quiet compared to my old engine. Also burns half the gas my Briggs used. I was pretty amazed by that. The brake cable fit right up and I had to install a throttle cable since my old one was set from the factory. And you have to thread the mounting holes in the engine. I threaded mine 3/8" NFT. But I am very satisfied so far. Only thing was the shaft was about 1" longer than my original which was fine in my case but might not work for others. Definitely would recommend.

This is a good value engine, but I did have to tinker. First off, this is the exact same engine as Harbor freights predator line. The manual is word for word and everything on the engine is the same but the cover. This came from the same factory, but this is 50 dollars cheaper. I bought the 173cc lawn mower engine. With that said this engine died on me every 20 minutes. The fix is easy and I think it explains most of the dead engines from the 1 star review. They did make the troubleshooting time worth it for me.The problem is the emergency stop circuit. I would describe this as a design flaw. The emergency stop circuit is very simple. There is a terminal on the ignition coil. This terminal goes to a wire that screws onto part of the engine. The other end of the wire that connects to the engine has a terminal as well. A lever makes contact with that terminal to ground the circuit and shut the engine off. The lever goes to the cable on your mower. The problem is there is no adjustment for that terminal to lever connection. For me when the mower got hot the terminal would deform and make contact to the lever. This caused sputtering and then eventually it would shut down until the engine cooled and terminal no longer made contact with the lever. The fix is easy, about 10 minutes and free.Take the 3 screws off the cover. Remove the cover. Take the 3 nuts off the internal cover and remove those. Follow the wire from the ignition coil to where it connects to the engine and bend that terminal down slightly. When the engine is running verify you have about half the lever travel with engine on and half with engine off. This will mean a safety factor on both sides. You can also use a multi meter. Connect one lead to the wire and the other to the engine body. Adjust until you get continuity for half the lever travel and no continuity for the other half of the travel.A troubleshooting step is to remove the wire from the ignition coil when your unit won't start. If you do this you will have no means to turn the engine off. You will have to run out of gas, pull the spart plug wire, or ground the terminal on the ignition coil. Be careful of the mower blade.Hopefully this helps.

My 20-30 year old third generation hand me down push mower finally died. I looked at buying a new one but you're looking at $500-600 to get a decent quality replacement and even those aren't really great. This costs a fraction of that price and while I was very leery of buying a cheap Chinese no name Amazon engine I've heard really good things about these Honda clones. So far it's been pretty great. Starts up first pull, every time. As a matter of fact the first time I went to start it I almost threw out my shoulder just because I pulled the starter way too hard. I was expecting to have to give it a hard pull like every small engine I've ever started but this engine requires much less effort. I'm still a little leery about getting replacement parts and we'll see how long it holds up but again so far I'm really happy. I would recommend flushing it out with oil before starting and changing the oil a few times after running it briefly as it had a lot of metal flakes in it from machining but that's true of even new name brand commercial engines I've used in the past. Also while it did bolt right up to my existing mower deck I did have to tap the holes in the engine and you may have difficulty finding a pulley to run the self propelled drive belt. I also needed to add a throttle cable. Just be forewarned that while it isn't a difficult install you will have to do some work to make it work but it's worth the effort.