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BILT HARD

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

    • Based on 905 reviews
Condition: New
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Availability: 17 left in stock
Fulfilled by Arkpower
Arrives Dec 26 – Dec 30
Order within 16 hours and 25 minutes
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Size: 173cc


Style: 4-Stroke Engine


Features

  • Unleash Dynamic Energy - Embrace the strength of a 173cc displacement 4-stroke vertical cylinder gas engine, boasting remarkable torque of 6.64 ft.lbs @2500 RPM. Capable of reaching a maximum speed of 3600 RPM, it's equipped with a staggering 4.4 maximum horsepower, all fueled by a 0.26-gallon tank.
  • Precision Shaft Specifications - Dive into the specifics of our engine with a 7/8-inch diameter shaft measuring 3.16 inches in length. The end is meticulously tapped with 3/8-inch - 24 UNF threads, further enhanced by a 3/16-inch keyway. The mounting pattern spans 8 inches, while the engine features a 3/8"-24 UNF tapped hole and a 0.079 x 0.34-inch through-hole.
  • Safety at the Forefront - Safety is paramount, evident in the built-in Force Air-Cooled, Splash Lubrication System, and Low oil shutoff function. Our engine spark plug system accommodates RA6HC/DCPR7E/DK7PTC spark plugs, offering a clearance of 0.027-0.031 inches. This engine is the perfect replacement for your lawnmower, ensuring a blend of power and security.
  • Vital Note - Kindly note that our engine is shipped dry to ensure freshness. Before starting, be sure to add gasoline and engine oil correctly (please note, oil is not included).
  • Certified Excellence - EPA and CARB Compliant. Our gas engine meets the highest standards of quality and compliance, proudly bearing both EPA and CARB certifications. Rest assured, each engine undergoes Oil Testing before packaging, so it may have a slight oily touch, signifying its 100% new condition.

Brand: BILT HARD


Speed: 3600 RPM


Horsepower: 4.4 hp


Product Dimensions: 11"W x 15.6"H


Material: Cast Iron


Brand: BILT HARD


Speed: 3600 RPM


Horsepower: 4.4 hp


Product Dimensions: 11"W x 15.6"H


Material: Cast Iron


Item Weight: 12.5 Kilograms


Shaft Diameter: 3.27 Inches


Manufacturer: BILT HARD


Item Weight: 27.5 pounds


Item model number: RV170


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 26 – Dec 30

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • Great little motor
Size: 173cc Style: 4-Stroke Engine
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. ... show more
Reviewed in the United States on August 4, 2024 by Sandy
    • Go ahead, do it, not sorry.
Size: 173cc Style: 4-Stroke Engine
I am not a mechanic, but a hospital pharmacist, however I like machines and I like to buy something and have it last, and last, and last. My old Wrangler Rubicon has 200 M on it and runs like a kitten purr still...it may be my last car. My old Badger rototiller engine gave out after years of use. Should I let go of $600 for a new one or try a new engine?....that is always a gamble. I bought this Bilt Hard....it fit the rototiller after a few new frame attachment holes and a 5/8 inch pulley since my old one was 3/4. I had to fool around with this since I put too much oil in and also fouled my carburetor by turning the engine upside down. But I figured that out and blew out the carb and it runs great and has the power to till my garden. It took a little work, if yours is a straight replacement it will be easy. It runs perfectly for me. ... show more
Reviewed in the United States on July 12, 2024 by John R.
    • very good
have had it over a year and doing good. used mobile one oil. used it for my log splitter
Reviewed in the United States on November 22, 2024 by Amazon Customer
    • Replaced Troy Bilt tiller motor
I replaced a 2007 Tecumseh motor on my tiller. Installation was a breeze. The output shaft is approximately 1/2 inch longer than the original which caused some minor adjustments to get the geometry back on the belts. Anything that was needed is readily available at TS. The motor stars easily and has more power than the original. Time will tell on the longevity, but so far I couldn't be happier. ... show more
Reviewed in the United States on March 16, 2024 by Terry Freeman
    • Good value
I purchased this engine for a couple reasons. 1. The price was the same as the more popular 6.5 hp engine that starts with a P. 2. I wanted to see if it was better balanced than the P. engine. It is! I have two of the other engines and both vibrate badly. One is on a generator and the other is on a minibike. If you're into foot and hand massage then go with the P. engine. This one beats it hands down and has enough power to take my 220 lbs and my son's 250 lbs up hills and back roads without any trouble. ... show more
Reviewed in the United States on November 21, 2024 by Carl Northrup
    • Awesome purchase
Size: 173cc Style: 4-Stroke Engine
It was either spend $250+ or buy this for half the price. Only trouble I had was the two cables you needed which I had none of them but two bicycle brake lines later and rigged them together for the length. Runs great.
Reviewed in the United States on October 25, 2024 by Melissa Fletcher
    • Important review, please read before buying. It could save you a lot of time.
Size: 173cc Style: 4-Stroke Engine
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. ... show more
Reviewed in the United States on April 27, 2024 by Amazon Customer
    • Pretty good!
Size: 173cc Style: 4-Stroke Engine
Review Image by Gadams Gadams
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. ... show more
Reviewed in the United States on October 7, 2024 by Gadams Gadams

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