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4 HP, 10 Gallon, 115 PSI Air Compressor - 90234 view this item at harborfreight.com »


Ratings: (5 is best)

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Review by matt167 on June 23rd, 2012
If you can still find 1 of these new, there worth at least $100. They are the same as an old model Campbell Hausfeld 3hp/ 10 gallon but have a different unloader, they were for sale at the same time, and the CH was $300. I have had mine since 2008-2009 and I have painted cars with it. Runs constantly, gets HOT from running consistent, but it still works good. Just recently after many hours of abuse while painting a gas tank, it smelled hot and when I went to drain the tank I saw the Capacitor had gone into meltdown. The cool thing is, I needed a wheel for it when it was still under warranty ( wheel broke ), and HF sent a head, gaskets, reed valves, bolts, the wheel, a capacitor and a cover. So I have everything to keep this going for a long time.
Review by Junk on August 21st, 2011
I bought this compressor about a year and a half ago and used it MAYBE six times to fill bike and car tires. The warranty is only ninety days, this thing cost me $150 to fill some tires, the gas station air is a better deal. The little chinese guy who built it didn't tighten the crank bolt and the rod broke, ruined the piston and destroyed the pump. Don't buy it, it's junk!
Review by lanya on November 4th, 2010
I own a few compressors, a few of the Dewalt and a Bostitch 'r two. This Horror Freight is not a bad compressor. Slightly heavy to haul around for finish work, but far more than needed for that type of work, anyway.

I've had it running three roofing guns, all set on "bump" (obviously not Horror Fright guns, as they are sequential only) ... but running them all. Kicking on and running quite a bit, but what do you expect driving three roofing guns at once?

I've had this one for a couple of years. When the air cleaner busted off, I just let the dirt in ... so far, so good. No problem and only once did it have to be reset, due to overload.

If you do need to use an extension cord, try to keep it to no more than 50 feet of 10 ga. I wouldn't go 12 ga., and I'd really try to keep it under 25 feet.
Review by concombrefrais on April 3rd, 2010
Great so far. I had it for about 2 weeks and used it quite a lot already. It works well even with the harbor freight 14 dollars (on sale I think, more ususally) purple spray paint. I had the smaller black 3 hp before and it died in three weeks of intensive use. However, I used it for over a week everyday with the wrong oil. An idiot at Ace gave me some "air tool" oil. It started to smell like burn oil and I realized the mistake but I am pretty sure the piston was already damaged (the cylinder head was BURNING hot). Which is what eventually failed. HF took it back with no problem and I got the bigger one instead. The bigger one, the red one, is actually easier to carry because the back handle is rounder and the front one is higher. So if you worry about portability, this is no worse than the smaller one, rather better in my opinion. Other than that they are very similar unit. This one came with the wheels attached but not the handle while the black one was the opposite.
For similar capacity you would pay over twice more at lowes. I do recommend to get the extended warranty if you use it a lot. Chances are that the unit would die within 3 years of intensive use so you'd get your money back on that.
Review by jrophoff on March 22nd, 2010
I have owned a few air compressors before purchasing this one (first compressor by Harbor Freight). This one by far has out done every one of them. I paid around $130 when it was on sale. Would definitely purchase again!

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