Genuine manufacturer approved carburetor needle valve for lawn and garden equipment engines. This item includes the seat. The needle valve opens and closes to control the flow of fuel into the carburetor. Make sure to disconnect the spark plug wire and drain all gasoline from the carburetor and fuel tank before starting a repair.
Kit-needle/seat 398188
OEM part for: Briggs and Stratton
Part Number: 398188
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Compatibility
This Kit-needle/seat will fit the following 22899 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs and Stratton
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
The ethanol gas damage old needle seat..
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, small crochet hook
Parts Used
Hard to start, little power. Black smoke at start. Symptoms indicate flooded carb situation
Tool Type
Lawn Mower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
1. Drained fuel tank.
2. Removed shroud, air filter assembly and disconnected fuel line. (Good time to replace air filter)
3. Removed carburetor, noting manner of attachment of throttle linkage.
4. Disassembled float bowl from carb.
5. Removed float, needle valve and needle valve seat.
6. Remove old air cleaner gasket.
7. Thoroughly cleaned carb and parts to be reused.
8. Replace needle valve seat per instructions supplied with new part.
9. Replace float and needle valve with new parts.
10. Reassembly float bowl on carb.
11. Reattach carb to engine, including reattachment of throttle linkage.
12. Reinstall fuel line. (Note: I recommend installing an in-line fuel strainer.)
13. Reinstall air filter assembly and shroud.
14. Fill fuel tank
15. Test run engine.
Engine now starts easy and has same power as before.
I try to avoid ethanol in my small engines even in those supposedly designed for it. It's a powerful solvent and a potential troublemaker in my experience.
Float needle seat washer failed from old age.
Tool Type
Lawn Mower
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Nutdriver
Parts Used
After making sure new seat was correctly oriented and centered in hole, I pressed it in with the blunt end of a drill bit that was almost as big as the hole. Then reassembled carb and put it back on the mower.
Lawn mower would start and die almost immediately afterwards
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, needle nosed pliers, small drill bit
Parts Used
2. Removed float bowl cover, float, main jet and needle.
3. Removed plastic seat from carburetor body by inserting a small drill bit into it and levering it out.
4. Inserted new plastic seat into carburetor body. Used same drill bit to guide it into place and firmly seat it.
5. Installed needle valve and float and checked for correct operation by inverting carburetor and making sure that float fully closed (float is horizontal).
6. Reassembled carburetor and installed it back on engine.
Would not run
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Wrench Set, T25 torx wrench
2, Determined main jet damaged
3. Ordered required (obsolete) parts from eReplacements
4. Installed replacement parts
5. Re-installed carburetor
6. Started engine and mowed lawn.
The seat for the needle was in up side down
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Rebuild Carburetor
Tool Type
Engine
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Carburetor had old gas clogging the fuel flow
Tool Type
Engine
Difficulty
Medium
Time
30-60 minutes
Tools Used
Pliers, Socket set, Wrench Set, Nutdriver
Old gas had clogged the carb
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver
Removed the carburetor
Removed the lower jet holding the carburetor bowl and removed the bowl
Pulled the pin and removed the float
Removed the old seat
Installed the new needle and seat and float
Reinstalled the bowl and jet
Reinstalled the carburetor, coverings and air filter
no engine compression, carb overflow due to needle valve not seating
Tool Type
Engine
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
Replace carb needle valve and seat.
Unit started on first pull.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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