SKU: 85377601486

491590 Carburetor - Fits B&S 491590 390811 392152 Carb 191700 192700 193700 Engine Series Vertical Engine

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Description

491590 Carburetor - Fits B&S 491590 390811 392152 Carb 191700 192700 193700 Engine Series Vertical Engine491590 Carburetor Tune Up Kit Key Features Optimized for 190000 Series: Precision jetted for 191700, 192700, and 193700 series vertical shaft engines, providing the correct fuel to air ratio for high torque lawn and garden applications. All In One Restoration: A comprehensive kit featuring a pre calibrated carburetor, high micron fuel filter, premium spark plug, and a high flow air filter for a total engine refresh. Precision Cast Alloy Body:

491590 Carburetor Tune-Up Kit

Key Features

  • Optimized for 190000 Series: Precision-jetted for 191700, 192700, and 193700 series vertical shaft engines, providing the correct fuel-to-air ratio for high-torque lawn and garden applications.
  • All-In-One Restoration: A comprehensive kit featuring a pre-calibrated carburetor, high-micron fuel filter, premium spark plug, and a high-flow air filter for a total engine refresh.
  • Precision-Cast Alloy Body: Manufactured from a high-density alloy to resist thermal expansion and warping, ensuring a consistent vacuum seal and stable idle speeds.
  • Manual Choke Integration: Designed for easy interface with factory choke and throttle linkages, allowing for smooth operation and reliable cold-weather starting.
  • Sediment-Resistant Design: Features an improved fuel bowl and needle valve assembly designed to resist the "gumming" effects of ethanol-blended fuels.

Replaces / Cross-Reference Part Numbers

  • Briggs & Stratton: 491590, 390811, 392152
  • Others: 491577, 391429, 390323

Compatibility & Fitment

This carburetor kit is a direct replacement for vintage and modern Briggs & Stratton vertical engines typically found on riding mowers and large walk-behinds. Key fitment includes:

  • Engine Series: 191700, 191701, 191702, 191707, 192701, 192702, 192707, 193701, 193702, 193707.
  • Equipment Types: Fits riding lawn tractors and heavy-duty walk-behind mowers from John Deere, Craftsman, Toro, and Murray utilizing the 190000 series engine platform.
  • Note: Verify your original carburetor shape, as some "L-Head" engines in this series use a different intake manifold configuration.

When to Replace

  • Engine "Hunts" or Surges: The engine RPM fluctuates wildly at a steady throttle position, indicating a clogged pilot jet or a vacuum leak at the gasket.
  • Starting Only on Fluid: The engine will only fire if starting fluid is sprayed into the intake, confirming the carburetor is not drawing fuel from the bowl.
  • Black Smoke / Fouled Plug: The engine runs "rich" and emits black smoke, suggesting the internal float is stuck or the main jet is restricted.
  • Fuel Leaks: Gasoline drips from the air filter housing or the bottom of the carburetor while the engine is off.
  • Backfiring: The engine pops or backfires through the intake when under load, often caused by a lean fuel mixture.

Installation Tips

  • Linkage Geometry: Use your phone to take a clear photo of the governor spring and throttle linkage setup before disassembly. These small springs are critical for correct engine speed control.
  • Gasket Surface Prep: Carefully scrape all old gasket material from the engine intake port. Even a tiny piece of leftover paper can cause an air leak that leads to surging.
  • Flush the Tank: If the old carburetor was clogged with "green" varnish, you must drain the gas tank and replace the fuel line with the included filter to prevent immediate contamination of the new unit.
  • Spark Plug Gap: Always check the gap on the included spark plug before installation (typically 0.030") to ensure optimal combustion.
  • Avoid Over-tightening: The carburetor body is made of soft alloy. Tighten the mounting bolts evenly but avoid excessive force to prevent cracking the intake flange.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 85377601486

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Timothy Mousseau
Natrona Heights, US
★★★★★ 5
Neat gadget
Color: Gold
Neat little gadget. Works great, easy to use and has a light indicator for temperature range. Keeps a cup of liquid hot right to the bottom.
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Reviewed in the United States on May 29, 2026
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Ctg1363
Pawtucket, US
★★★★★ 5
My tea stays warm to the bottom of the cup!!!
I am so glad I purchased this mug water. I drink tea all day but it cools down quickly. Since I purchased this mug warmer my tea stays hot to the bottom of the cup. The temperature is adjustable so you can keep your drink at your desired temperature. The top is glass and wipes clean easily. I like the rubber gasket that fits on top of the warmer. It keeps your mug in the center of the warmer and should you have a spill it catches the liquid. I've been using it every day for over a month now and it's going strong and is reliable. Perfect for personal use or as a gift.
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Reviewed in the United States on May 2, 2026
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Sarah Akin
Alexandria, US
★★★★★ 5
Keeps my coffee as hot as I want it to be
Color: Silver
This coffee warmer is much better than the candle warmer that I was using for my coffee before. With a range of 3 temperatures, I have a choice of temperatures from hot to very, very hot, and the warmer shuts itself off after a while, just in case I forget. The description advises that ceramic cups do not retain heat as well as flat-bottomed cups, but I have not found that to be a problem. Coffee in my ceramic mug stays as hot as I want it to be. The knob on the side makes this warmer easy to turn on and to select a temperature, plus I feel that it is a good value.
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Reviewed in the United States on February 11, 2026
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Cecilia Tosh
Fort Morgan, US
★★★★★ 5
Perfect Mug Warmer
Color: Black
I bought this to replace one I'd had for more than 25 years & I'm glad I got this one. Keeps my hot drinks hot for hours & will shut off after that. Quickly heats back up when needed. Very sleek looking. Easy to set up. Just take it out of the box & plug it in.
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Reviewed in the United States on February 12, 2026
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Amazon Customer
Pawtucket, US
★★★★★ 5
I love it for my workspace! Hot tea all day
Color: Wood Grain
I love this item. The size is perfect, as I prefer something less bulky for my work desktop. It isn't as fancy as others that has the digital display screen, which is fine by me, because I don't necessarily need that. The knob and different colors that indicate the temperature range works fine. The temperature on this thing works fantastically well for me. Using it on the lowest setting keeps my drink nice and hot in a cold office. I use a heatproof glass teapot with this and its a good fit. It keeps my tea hot throughout the day, so I am able to pour smaller amounts of drink and take my time sipping it throughout the day without worrying that it will get cold. At point I almost forgot that it has an automatic shut-off safety feature when I noticed it was off. So that is a good feature to have. I highly recommend this.
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Reviewed in the United States on January 15, 2026

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