Description
iFJF 845273 Replacement Carburetor — Briggs & Stratton 611477 / 613477 Series
The iFJF 845273 is a complete replacement carburetor for Briggs & Stratton 611477 and 613477 series engines found on lawn mowers, pressure washers, tillers, and other outdoor power equipment. If your engine surges, stalls under load, or refuses to start despite fresh fuel and a clean spark plug, a worn carburetor is the likely culprit. Our direct-fit replacement bolts on in minutes and comes pre-adjusted for reliable operation right out of the box.
Key Features & Benefits
OEM-Spec Replacement
Engineered to match B&S part numbers 845273, 842097, 844172, and 845032. The throttle and choke linkage mounting points, fuel inlet position, and mounting bolt pattern are identical to the OEM carburetor — no modifications, no adapter plates, no frustration.
Complete Kit — Carburetor + Fuel Filter + Gaskets
Includes the carburetor, mounting gaskets, and an inline fuel filter. The filter catches debris before it reaches your new carburetor, protecting your investment from the first start. Everything arrives in one box.
Pre-Adjusted Fuel Mixture
Factory-set for the correct air-fuel ratio on B&S 611477 and 613477 engines. Minor idle-speed adjustment may be needed for your specific application, but you won't need to mess with the mixture screws.
Technical Specifications
| Specification |
Detail |
| Model |
iFJF 845273 |
| Replaces OEM |
B&S 845273, 842097, 844172, 845032 |
| Engine Series |
B&S 611477, 613477 |
| Included |
Carburetor, Gaskets, Fuel Filter |
| Fuel Type |
Gasoline |
Common Applications
- Briggs & Stratton 611477 Series Walk-Behind Mowers
- B&S 613477 Series Self-Propelled Mowers
- Pressure Washers (B&S powered)
- Rotary Tillers & Cultivators
- Generators with B&S 550-650 Series Engines
- Lawn Edgers & Leaf Blowers
Installation
- Disconnect spark plug wire. Turn fuel valve OFF or clamp the fuel line.
- Remove the air filter housing. Disconnect the throttle linkage and governor spring.
- Remove mounting bolts and lift off old carburetor. Clean the mounting surface.
- Install new carburetor with gaskets. Tighten bolts evenly.
- Reconnect linkages and install the inline fuel filter (arrow pointing toward carburetor).
- Restore fuel, reconnect spark plug, and start. Let warm up and adjust idle if needed.
Frequently Asked Questions
How do I know if my engine is a 611477 or 613477 series?
The engine model number is stamped on the metal blower housing or valve cover. Look for a string like "12H802" or "126M02" — the first two digits indicate cubic inches (12), and the "H8" or "M0" prefix helps identify the series. You can also search your engine's full model number on the Briggs & Stratton website to confirm series compatibility.
Does this carburetor come with a new primer bulb?
The primer bulb is typically part of the air filter housing, not the carburetor itself. If your primer bulb is cracked or not working, it may need to be replaced separately. The carburetor does include the primer port for connection.
Can I use this on a Craftsman mower?
Yes, if your Craftsman mower has a B&S 611477 or 613477 series engine. Many Craftsman, Husqvarna, and MTD mowers use these engines. Always verify the engine model number rather than the mower brand/model.
Will a new carburetor fix hard starting?
In most cases, yes — if the hard starting is caused by a clogged or worn carburetor. If hard starting persists after replacement, check the spark plug, ignition coil, and valve clearances. Fresh fuel and a clean air filter also help significantly.
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