Oregon 49-058 Primer Bulb for Briggs & Stratton Engines

Worth it for small engine repair shops who need one part number that replaces 9 different OEM numbers. The Oregon 49-058 delivers a lifetime warranty while fitting Quantum 3.5-6 HP, Quattro series, and Sprint 3.5-4 HP engines.

This aftermarket primer bulb earned a 5.0 average rating across retailers, with contractors praising its exact fit for B&S 3.5 HP engines and perfect fit for Quantum series. Montana dealers benefit from simplified inventory — one SKU covers 494408, 4128, 4178, 5084D, 5084H, 5084K, 691347, 694394, and 496115.

Cross-Compatibility and Applications

The compatibility list spans over 300 specific engine models, making this the Swiss Army knife of primer bulbs. Walk-behind mowers, pressure washers, and tillers — basically anything with a Pulsa-Prime carburetor can use this bulb.

Specification	Value
Dimensions	0.75” x 0.75” x 0.75”
Net Weight	0.32 oz (9.07g)
Shipping Weight	0.03 lb (13.6g)
Engine Series Compatibility	9B900 through 9T700 series

The variety pack includes both red and black bulbs, covering the color preferences some techs swear matter (they don’t, but the option’s nice). For comparison, Stens offers the 120-178 as an alternative, but Oregon’s lifetime warranty sets it apart.

Material Construction and Warranty

The flexible polymer/rubber construction handles Montana’s temperature swings without cracking. Installation requires zero tools — just pop out the old cracked bulb and push the new flexible bulb into the carburetor seat.

Oregon backs this with a lifetime warranty on all replacement parts, while the part is guaranteed to meet or exceed original equipment standards. That’s confidence most aftermarket suppliers won’t match. Oregon considers this a high-quality aftermarket alternative that matches OEM specifications, not just a cheap knockoff.

California Proposition 65 Warning: Product contains chemicals (including nickel) known to the State of California to cause cancer or reproductive harm. Standard warning for engine parts, nothing unusual here.

FAQs

Q: Will this primer bulb fit my older Briggs & Stratton engine?

This bulb replaces OEM parts 494408, 4128, 4178, 5084D, 5084H, 5084K, 691347, 694394, and 496115. It’s compatible with over 300 specific engine models, including the 9B900 through 9T700 series. Check if your engine is a Quantum 3.5-6 HP, Quattro series, or Sprint 3.5-4 HP with a Pulsa-Prime carburetor.

Q: How long will this aftermarket bulb last compared to OEM?

Oregon provides a lifetime warranty on all replacement parts, which typically beats standard OEM coverage. Reviews show no reported complaints across Amazon and AgriSupply, with users specifically noting good quality material.

Q: Do I need any special tools to install this primer bulb?

No tools required — it’s a tool-less installation. Just pop out the old cracked primer bulb and push the new flexible bulb into the carburetor seat. Consult your engine owner’s manual for specific maintenance intervals.