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18" Flexible Funnel
18" Long Neck Black Funnel
3 HP (79cc) OHV Horizontal Shaft Gas Engine
For lawn mower use only. This item can only be shipped within the 48 contiguous states via Standard Ground Shipping. In order to return this item for a refund or replacement, all fuel must first be drained.
(based on 36 reviews)
of respondents would recommend this to a friend.
Most Liked Positive Review
Ultimate 21" Snapper replacement engine
The Predator vertical shaft engine will fit on 21" Snapper Hi-Vacs with Self Propelled. It is a near perfect fit and choice for one of the longest running production models of mowers ever prod...Read complete review
The Predator vertical shaft engine will fit on 21" Snapper Hi-Vacs with Self Propelled. It is a near perfect fit and choice for one of the longest running production models of mowers ever produced and still produced. Growing up I ran commercial lawn care business and did many engine rebuilds and replacements for my business and for another large commercial shop, this Predator engine is smartest and best engine replacement for the money on a non-throw away mower. I bought a used residential Series 19 in very good condition with a seized motor. The Series 20 is the current model and same as the 19 – engine replacement should be applicable to all Hi-Vac series from my experience with these machines since the early 80's before and after blade brakes. By adding this engine and steel wheels you will essentially have a commercial machine that would only be rivaled by new top of the line commercial models. If I were back in the commercial lawn care business or starting one up, I would not hesitate to use these engines and set up for my push/trim mower. Here is how to do it and my review:• If your current engine has a 1" shaft you need to change the blade Adapter and engine pulley to 7/8". I used OEM part numbers 1-2927 and 2-1764 (or aftermarket)respectively. Only one problem is that the keyway on this engine has a 3/16" keyway, the easiest cheapest solution is to carefully grind/file half the key stock in a vise to fit the adapter and pulley. Not sure if the OEM or the aftermarket companies makes these parts with a 3/16" keyway. Don't worry about the 1" step-up on the Crankshaft, push the drive pulley against the 1" step-up and tighten the set screw and the belt will align perfectly. The blade and adapter align to the perfect height to the bottom of deck about ¼" or so of clearance to the rolled lip. On GXV models you will need to change the 1" engine Pulley to 7/8" and the existing 7/8" blade adapter can be reused, the 7/8" stepped crankshaft is shorter on the GXV only to adapt for the blade. • There is no deflector on the GCV type muffler which will melt the bagging chute without the deflector, suggest using horizontal shaft muffler deflector B&S 393760, Stens 110-410, or Honda 18331-883-810. Drill 2 or 3 - 1/8" holes in the muffler guard and attach the deflector facing forward with pop rivets or sheet metal screws. GXV mufflers don't have this issue since they exhaust through the front. Not sure if a GXV muffler would fit this engine, but it would not be cost effective to buy this expensive part since the deflector inexpensive. • Only one hole is tapped on crankcase mount to 3/8" UNF, I tapped the other two to 3/8" UNC with no problem and reused the bolts from the old engine, you can use 5/16" bolts with a nut as recommended in the manual. Tapping makes a cleaner install and no need for a backup wrench.• If you have a older mower or other application, the blade brake/kill switch can be disabled, remove the 3 nuts on the pull rope cover, unplug the kill wire on the coil and add your own kill switch, it would better/more universal if the switch was built into the throttle linkage like the old mowers prior to blade brakes. The brake spring can be removed (doesn't have to be) and tie the mechanism open with wire or pull the flywheel and remove the whole mechanism. This is applicable to early 80's model mowers and back before the government mandate of adding blade brakes. And yes old high quality mowers like Snapper, Toro, and others are worth fixing which you may get another 20-30 years of service out of it. • The other minor issue since I went from a B&S OHV to the Predator the throttle cable needs to be longer. I made one with a long bicycle brake cable, pull the inner cable out, route, cut to length, replace cable with stiff wire, and make small Z bends on both ends or buy the OEM cable for the GXV. The Carburetor and Exhaust on the Predator is opposite to B&S, the configuration is the same if you are replacing a GXV. Most of the cheap consumer/residential aluminum bore engines without bearings wear out quickly and require adding oil as the aluminum block wears out from the steel rings . The top of the line commercial mower models equipped with engines such as the GXV comes with a cast iron bore with a ball bearing supported crankshaft that are made the right way for durability and longevity similar to this engine that will almost never wear out. So far highly impressed, starts every time on the first pull, very fast walking/jogging speed, high RPMs, and very powerful. The only accessories besides the sparkplug wrench, HF should consider adding or selling separately is a muffler deflector, a heavy gauge pre-bent wire to pin/disable the blade brake for older mowers and other applications, universal key stock, create 7/8" X 1" adapter bushings with keyways . On the engine itself, perhaps cut a smaller keyway on the crankshaft opposite the large keyway and adding a stop/kill switch in the throttle mechanism. Harbor Freight did a great job packaging a fairly universal vertical shaft engine. In the HF stores they should also provide a small parts rack with consumable items such as air filters, spark plugs, and other consumable parts. However, if some of my suggestions are included or sold at HF this would save people time and money researching the parts to do an engine replacement. Hope this helps the Snapper following.
Most Liked Negative Review
Great Engine Needs Compatibility Parts!
Dear Eric Schmidt, Since manufacturers of mowers are doing things to prevent compatibility and Since this is HFT's only lawn mower engine offered it needs to be more universalized .The mounting plate seems to ...Read complete review
Dear Eric Schmidt, Since manufacturers of mowers are doing things to prevent compatibility and Since this is HFT's only lawn mower engine offered it needs to be more universalized .The mounting plate seems to do this very well. However for self propelled use it needs to come with a PTO pulley as most will not fit on the shaft. Also it needs a universal blade bracket as mine has a different shaft size. Finally a set of universalized control cables would make it much more likely to work out of the box. I would not mind these being seperate offerings as long as I could get them at HFT.Getting parts for machines with mixed parts is made almost impossible by design of most of the major manufacturers and their part numbering systems. Cross referenceing to several manufacturers parts that would likely work with The HFT engine would be a great help! Availability of Blades, And Blade Brackets, pulleys, cables including replacement cables for the self propelled features are all necessary. That way by re-engining I get an effectively renewed mower.Thanks,GND
Reviewed by 36 customers
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(0 of 1 customers found this review helpful)
Fits like a Glove!
By Steve R
from Niagara Falls, New York
About Me Avid Do-It-Yourselfer
Comments about Predator Engines 5.5 HP (173cc) OHV Vertical Shaft Gas Engine:
I have a 13 year old Scotts self propelled mower with a rear bagger that's in good shape until I hit a rock and bent the shaft. I knew Harbor Fright sold replacement engines but I was skeptical. I looked at all the reviews and decided to give it a try. My Scotts mower had a 6.5 HP Tecumseh engine. The HF engine aligns perfectly with the 3 holes on the mounting plate. I reused the 3 3/8-18 bolts. I tapped the engines mounting and added blue lock-tite to the bolts since they were a little sloppy going in but tighten right up. The old pulley and blade adapter slid right on since it's a 7/8" shaft and the blade bolt is 3/8-24. The engine brake cable snapped right in. I had to buy a throttle control cable at the Hardware store. Mounted the control and shorted the cable to make it if with my mower. The starter cord is long enough to put into the handle mounted cord bracket. I added oil and a few drops in to the spark plug hole to lube up the cylinder. Pulled the cord a few time to lube up the engine. Put in the gas primed the bulb 6 times. Started up on the 3rd pull. I mowed up the leaves in my front yard. Ran it for 45 minutes at ran perfect. All I needed was the HF engine, throttle cable (no extra hardware needed) about hour of time and backup and running. The only con I found was that the bottom plate of the engine in not flat. Since the mounting bosses sticks out about a ½". So there is ½" gap between the engine and the mower mounting plate so some grass get on top of the deck as you are using it but it's no big deal. So far I'm very happy I decided to re-engine my mower with the HF engine and I would highly recommend it. Thanks HF for saving my mower.
Bottom Line Yes, I would recommend this to a friend
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Replacment engine for Snapper Hi-Vac
from St. Charles, Missouri
I followed the instuctions on some previous reveiws and had no problems. I also found that the Honda Air Filter Part #08171-ZL8-001 fits this engine perfectly and the MTD Blade Adapter #948-0323 is what is needed to re-use the Snapper Hi-Vac Blade. This engine has features like Roller Bearings and Steel Sleeve Cylinder Lining that are on much more expensive models.
Makes a lawn mower run like it should
from Wimberley, Texas
I live out in the country and mow over rocks of all sizes and tree roots. I keep my mower set high to avoid these obstacles but misjudged and hit a large rock with my (cheap) 22 inch Huffy, Bent the crank shaft. This motor, being universal is not an exact fit but it is very close. My Huffy had no throttle( I can't find a push mower any more that does) control and ran wide open all the time. I needed to be able to throttle back for safety and after adding a throttle control to this installation, man what a sweet running machine. Installation may require threading the bosses on the motor but that's about the only special tool I needed. Motor needed about 10 pulls on initial start but since then only one or two gets it going. Very quiet, powerful, and I can set the engine speed anywhere I desire. I love it and am going to buy another motor just like it to keep as a spare.
By HF Dweller
from Lansing, MI
I'm speaking second person here, but I picked up one of these for my dad's birthday for something he could play with. He said it was fairly easy to throw on a 22" mower body he had laying around and started like a champ. He said it has pretty good power and was pleased with it's performance. He's quite the wiz with small engines, so I'll take it that this is a pretty good piece of machinery.
(3 of 3 customers found this review helpful)
Much better engine than B & S
By Andy the Lawn Guy
from San Antonio, Texas
I run a small lawn care business and the 6.75 HP B&S engine on my mower (Model 917.374431) had worn rings. I purchased the Predator engine and for less than repair parts from Sears. It was an easy conversion, other than I had to bore out the two unthreaded mounting holes and the B&S engine has a 1" crank PTO, whereas the Predator has a 7/8" PTO. The original pulley and blade attachment assemblly had to be replaced, but easily found what I needed at a lawn mower repair shop. Total time for conversion was less than 2 hrs. once I got the needed parts.
Engine purrs and simple to install
By Guitar Dan
from Grand Rapids, MI
About Me Casual Do-It-Yourselfer
Mounting and connecting everything was simple; but I did need to supply two extra mounting bolts. Clearly, you'll need to have the part to mount your blade to; they run about $10, plus the price of the blade. After adding oil and gas, it started nicely on the second pull. I let it run under no load for fifteen minutes and then cut away with ease. Even at low idle, cutting was to problem -- must have good torche.
Makes repowering a viable option!
from Greenbrier, AR
Repowering a "disposable" mower usually doesn't make much sense. I looked at this engine to repower an old 20" Murray fixed wheel mower. Why? 1st off low end mowers come with underpowered low end motors. These motors bog down easily and they have aluminum cylinders that wear fairly quickly and bushings on the crank. This motor is really strong! It also has a cast iron cylinder sleeve and ball bearing crank shaft. So if you pick up this motor with a 20 or 25% off while it is on sale you can repower your old mower with a powerful beast of an engine for about 1/2 the price of a new disposable mower and have a much nicer engine that will cut grass like no one's business! I had to buy a new blade adapter for it because the old one was stuck and wasn't worth the effort to get off since a blade adapter runs around six. The adapter I used was an Oregon 65-224 that replaces MTD 753-0484 and 753-0462. I couldn't find the Arnold adapter mentioned by another reviewer but this one bolts right in too. That was all I needed to buy in addition to the engine. The stock blade brake cable and throttle cable bolt right on to this one with no issues at all. It was replacing a 3.5 Briggs that was locked up and had a bent crankshaft. The previous owner of our house left the mower here and I needed a small trim mower for areas where my riding mower couldn't go. I think repowering this free motor was a far better option than buying a low end underpowered mower in my case and I saved quite a bit as well. It bolted right in with no drilling of new holes in the deck and the old engine to deck bolts were self tapping so no need to even thread the holes in the new motor. ½ Hour swap. I did the break in as the manual suggested and then changed the oil. This motor is quiet, sips gas and has more power than any other gas engine this size that I have ever used. Used it to cut a neglected area on our property that had knee high grass and it never bogged down. Went through with no issues whatsoever! I am very impressed. I will see how long it holds up, but at least at this point I'm very pleased with my purchase! You can here it run if you look on you tube and search" Harbor Freight 173cc lawnmower engine". Mine is the one on the red Murray push mower. 5 second clip but you can hear it is a fairly quiet engine.
(1 of 1 customers found this review helpful)
Works great; comes as advertised.
By Mr. Fixitvich
from Denver, CO
Bought this to replace the 3.5 HP Briggs & Stratton motor on my MTD 21" push mower. It was a snap to install (I took my time and was still done swapping it out in under an hour). For a little extra you can get universal control cables for the throttle/engine brake at a hardware or auto part store. The old blade mount was a perfect fit and bolted right on to the crank. I'd say that including time spent fitting the universal controls, I was up and running in an hour and a half. The only problem(s) I had with it were related to the spark plug. The porcelain was cracked on the plug that came in it, so I had to buy a replacement one before I could use it. Not too big a deal, since plugs are cheap, but the plugs listed in the manual didn't fit. The manual specifies the NGK BP-6ES or BPR6ES, neither of which fit the engine (diameter too large). I removed the factory plug and had it matched at an auto part store. The correct NGK plug for the job is the DCPR7E (P/N 3932). If you choose another brand of plug, you should be able to cross-reference it from those numbers.After replacing the plug, it fired right up and ran beautifully. I allowed it to run under no load for about 20 minutes to break it in. Its operation was surprisingly smooth, powerful, and quiet. It chewed through some pretty bad overgrowth without even flinching. I would say that I am very happy with this purchase and would definitely recommend it, but do consider buying a new plug for it before you install it.
Easiest project I've done in years
By Usually all thumbs
MTD Tradesman (ca. 1992 w/large rear wheels) well-known brand engine finally broke down. Cheaper to replace it than buy the parts to fix it. Only downside: I had to scavenge the internet to find a blade adaptor to 3/16" keyed 7/8" shaft (old shaft was splined). Finally took a shot in the dark and lucked out with the right blade-bolt spacing. This was the only glitch in a flawless replacement. Bolt pattern fit exactly. ~$2 for hardened bolts, etc. and the engine dropped right in. Had to shorten the throttle cable, otherwise a completely perfect fit. I was amazed!
By Garage Rat
from Versailles, MO
My 13 year old B&S was on it's last leg. I have a JS60 John Deere and beside the motor the rest of the mower was in very good condition. I debated about buying a new one, but in the end for the price I decided to try this motor. The bolt pattern matched up perfectly and only had to thread 2 holes. The only problem I had was that the old B&S used a larger blade adapter than this 7/8" shaft. Lucki
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