Generac 3400 PSI SpeedWash Review: Is It Worth Buying?

Overview

Let me be straight with you. I bought the Generac 3400 PSI SpeedWash expecting a solid mid-range gas washer for my side jobs and personal property. I鈥檇 used a buddy鈥檚 older Generac a few years back鈥攊t was loud, heavy, but it worked. This new SpeedWash model pushes 3400 PSI and 2.8 GPM. That鈥檚 real cleaning power on paper. Price is around $499. At that point, it competes with the big box store favorites from Simpson, DeWalt, and Ryobi.

Who鈥檚 this for? Homeowners with big driveways, some light commercial use, and guys like me who run a small handyman operation. It鈥檚 not for a contractor working 8 hours a day every day鈥攖hat鈥檚 a Honda GX series machine territory. And it鈥檚 not for somebody who only needs to spray off a patio once a year. That鈥檚 an electric machine.

I tested this thing over three weekends. I cleaned a 2-car concrete driveway stained with years of oil, a wood deck that hadn't seen cleaner in two years, vinyl siding with algae, and my personal truck (a dirty Ford F-150). I wanted to know if Generac actually improved their game or if this is just another box with a pump bolted to it.

Spoiler: I'm honestly impressed. But I鈥檝e got gripes that almost made me return it.

Key Features

Here鈥檚 what jumps out at you from the specs:

• 3400 PSI / 2.8 GPM 鈥?That鈥檚 9,520 cleaning units (PSI 脳 GPM). That鈥檚 real work capacity. It鈥檚 not insane pro-level, but it鈥檒l strip paint and blast mud off heavy equipment.
• SpeedWash nozzle system 鈥?A dial-style nozzle on the wand that rotates through 0掳, 25掳, 40掳, and soap. No more hunting for lost tips.
• 196cc Generac OHV engine 鈥?It鈥檚 their own brand. No Honda or Subaru badge here. That worried me at first.
• Triplex plunger pump 鈥?Specifically, it鈥檚 a CAT pump. CAT is known quality. That鈥檚 a big plus at this price point.
• Steel frame with 12-inch wheels 鈥?Big tires for rolling over gravel and uneven ground.
• 49-state compliant carburetor 鈥?Runs on 10% ethanol gas. That鈥檚 standard, but nice to know.
• Weight: 68 pounds 鈥?Heavy. But not unmanageable for one person.

The real standout is that SpeedWash nozzle. I鈥檝e used quick-connect wands that leak, tips that fall off, and lost more nozzles in the grass than I care to admit. This dial design is locked in place. You twist, it clicks, and it stays. That鈥檚 actually thoughtful.

Performance

I started with the driveway. It鈥檚 a standard 2-car slab, about 400 square feet. Oil stains from my truck, dirt ground in from winter, and some mildew patches near the edge. I used the 25掳 setting on the SpeedWash wand. First pass: it blasted the dirt away like a power broom. The 2.8 GPM keeps the surface wet enough that you鈥檙e not fighting dry streaks. I soaked the stains with a degreaser (ZEP Purple, my go-to), let it sit 5 minutes, then hit it with the 0掳 pin jet. Those stains lifted in one pass. Total time: 1 hour 15 minutes. That includes dragging the hose, moving the machine, and taking a water break. My old Karcher K5 would have taken close to 2 hours with its lower flow rate.

Next: the wood deck. This is where things got real. I used a surface cleaner attachment that accepts M22 fittings (the machine uses standard M22, no adapters needed鈥攖hank you, Generac). The 3400 PSI chewed through old paint and mildew in seconds. But I had to be careful. At full throttle, this thing will gouge soft pine if you stay in one spot. I dropped the pressure down by backing off the throttle a little鈥攎aybe 75% speed. That鈥檚 a trick I learned the hard way with a previous Simpson machine. It worked great. Deck cleaned up in 45 minutes. The Karcher K5 can鈥檛 handle a surface cleaner that big鈥攊ts flow rate chokes. This one didn鈥檛 even notice.

Vinyl siding was a breeze. 40掳 wide spray, no soap needed. It washed off years of Texas dust and mildew in straight lines. No streaking. No high-pressure damage. That鈥檚 the benefit of consistent GPM and decent PSI鈥攜ou get a wide pattern that actually pushes water, not just a mist.

My truck. I used the foam cannon that came with the machine (yes, it includes one). The soap coverage was thick鈥攁ctually thick, not the watery mess you get from cheap included cannons. Then I rinsed with the 25掳 nozzle. I didn鈥檛 scratch the paint. No chunked decals. Good job.

Here鈥檚 where it annoyed me: the hose. The supplied hose is 30 feet and feels like rubber that鈥檚 been cheapened. It kinked twice during the driveway cleaning. I had to stop and straighten it each time. And the quick-connects on the machine鈥檚 inlet started leaking after the second use. A tiny drip. Not a flood, but enough to annoy a perfectionist.

Also, the wheels. They鈥檙e 12-inch, which is nice, but the axle is a thin bolt that wobbles slightly. The machine rocks when you pull it sideways over a curb. Not a deal killer. But it feels like they saved $2 by not using a proper axle pin.

Build Quality

The engine is a Generac 196cc. It started first pull every single time. I used it over three weekends with 30+ restarts. Cold start, warm start鈥攐ne pull, maybe two if I forgot to choke it. That鈥檚 reliable. The air filter is a basic foam element, which is fine for homeowner use. I鈥檇 upgrade to a paper filter if I was using it in dusty job sites. The gas tank holds about a quart鈥攜ou鈥檒l burn through that in about 45 minutes of run time. Fill-ups aren鈥檛 too often.

The pump is a CAT triplex. That鈥檚 the good stuff. CAT pumps are rebuildable, parts are available, and they handle hard water better than the cheap axial cam units. The pump is protected by a thermal relief valve鈥擨 haven鈥檛 seen it kick on, but it鈥檚 there. It鈥檚 also directly driven off the engine with a belt. That means if you hit something, the belt slips instead of destroying the pump. Smart.

But the frame. It鈥檚 built from steel tubing. It鈥檚 welded decently. However, the handles are covered with a thin foam grip that started to tear after I strapped it into my truck bed one time. Seriously. The foam split near the right handle. I wrapped it with electrical tape. That鈥檚 a cheap move from Generac. They could have used rubber grips that last.

The plastic shroud around the engine is thick enough but the speed-dial knob on the wand is hard plastic. It鈥檚 not soft-touch, it鈥檚 not rubberized. It works, but it鈥檚 not premium. And the wand itself is aluminum, which is good, but the collar where it connects to the hose is brass鈥攁ctually brass, not some zinc alloy that corrodes. That鈥檚 a win.

Overall build quality is 7 out of 10. The pump and engine are solid. The frame is okay. The handles, hose, and plastic bits are where Generac cut corners. That鈥檚 typical at $500, but I鈥檝e seen Simpson models with better hose routing and sturdier frames for the same money.

Pros & Cons

• Pro: Real cleaning power. 3400 PSI and 2.8 GPM doesn鈥檛 lie. It strips dirt fast.
• Pro: CAT pump. You can rebuild this pump. Most machines at this price throw away axial pumps.
• Pro: SpeedWash dial nozzle. I want this on every pressure washer from now on. No lost tips.
• Pro: Starts easy. First pull. Every time.
• Pro: Includes a foam cannon. Actually works. Not a toy.
• Con: Hose kinks. The included hose is cheap and short. I bought a new 50-foot replacement after the first weekend.
• Con: Leaky quick-connects. The inlet fittings dripped after two uses. Dab of Teflon tape fixed it, but I shouldn鈥檛 have to.
• Con: Foam handle grips suck. Tearing after one ride in a truck bed.
• Con: Wheels wobble. The axle is just a cheap bolt. Not a hard fix, but annoying.
• Con: No Honda engine. It鈥檚 fine, but if you want long-term resale or parts at every small engine shop, you鈥檒l miss the red badge.

Value for Money

At $499, this machine sits in a weird spot. You can get a Simpson 3400 PSI (MegaShot) for about $420 at Tractor Supply. That Simpson also has a CAT pump and a Honda engine clone. The Generac has the SpeedWash nozzle advantage and a slightly better frame design. The Simpson has a better hose (it doesn鈥檛 kink as bad) and better wheels (no wobble).

You can step up to the DeWalt DWPW3400 for about $550. That one has a Honda engine (the real thing), a CAT pump, and a steel wand. It鈥檚 heavier at 73 pounds, but it鈥檚 built tougher. The Generac is lighter and the nozzle system is better. But the DeWalt鈥檚 engine will outlast the Generac鈥檚 by years if you maintain it.

On the cheap end, Ryobi offers a 3100 PSI gas unit at $379. It works, but the pump is axial, the frame is thinner, and it鈥檚 not as repairable. The Generac is a better investment if you plan to use it more than twice a year.

So is it fairly priced? Yes鈥攊f you value the nozzle system and want a CAT pump. No鈥攊f you want a Honda engine or a machine with less cheap plastic bits. I think it鈥檚 $50 overpriced compared to the Simpson. But I鈥檇 pick it over the Ryobi all day.

Verdict

Who should buy this: Homeowners who have a large driveway, a wood deck, and some siding to clean. It鈥檚 a solid weekend warrior. It鈥檚 for someone who values the SpeedWash nozzle over a Honda badge. If you鈥檙e the kind of person who loses nozzles or hates fumbling with quick-connects, buy this machine today. It鈥檚 also for the guy who wants a pump he can rebuild in 5 years.

Who should skip this: Contractors who run a machine 5 hours a day. You need the DeWalt or a dedicated pro unit with a Honda GX. Also, skip it if you鈥檙e on a tight budget鈥攖he Ryobi is $120 cheaper and will clean a patio fine. Avoid it if you鈥檙e sensitive to little quality gripes鈥攖he leaking fittings and foam handles will bug you.

Me? I鈥檓 keeping it. After the hose swap and the Teflon tape fix, it鈥檚 become my go-to washer for side jobs. The SpeedWash nozzle alone saves me 5 minutes per job just from not hunting for tips. The engine starts every time. The CAT pump is honest. I just wish Generac spent an extra $10 on the handle grips and a better hose. That would make this a 鈥渂uy without thinking鈥?machine. As-is, it鈥檚 a 鈥渂uy if you鈥檙e willing to do two cheap upgrades.鈥?/p>

I鈥檇 rate it 7.5 out of 10. Good value, real power, some annoying cheapness. But for $499, I鈥檝e seen worse. Way worse.