Part Location Diagram of 391681 Briggs and Stratton Kit-pump/choke Dia
See part B-394 in the diagram
( Grid squares measure 1x1 inch )

Kit-pump/choke Dia 391681

Manufactured by:
Briggs and Stratton
ERP Number:
ERP8966318
Part Number:
391681
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

30 - 60 mins 

(6 rated repairs) ?

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Product Description

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This genuine manufacturer approved replacement part is designed for use with lawn and garden equipment. Fits 3.5 and 4 gross HP vertical crankshaft engines (pulsa-jet carburetors). This item provides an air tight seal for the carburetor. Includes a carburetor diaphragm and a metal spring. To complete this repair you would need wrench. • Disconnect spark plug • Remove muffler • Replace diaphragm and spring • Re-assemble and test the unit

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Briggs and Stratton
  • Toro
  • Cub Cadet
  • Lawn Boy
This part works with the following products:
  • Engine
  • Lawn Mower
Part# 391681 replaces these:
299636, 391643, 391681, 496416,

Customer Part Reviews

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4.5
Average Rating (out of 5):
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(2 Reviews)
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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.

Easy 

30 - 60 mins 

(6 rated repairs) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

Very bad engine misfire, could not be corrected with needle valve adjustment or carb cleaning

Richard from Chester Springs, Pennsylvania

4 of 4 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set
Parts Used:
692189, 692206, 391681
1. Removed carburetor and separated top from bottom
2. Saw very slight wrinkle close to spring on fuel pump
3. Replaced membrane, pump spring and breather grommet. Likely only the membrane was worn.
4. Reinstalled carburetor and engine started right up and ran like new!
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The engine was hard starting and the RPMGÇÖs surging up and down.

Walter from Santa Maria, California

2 of 2 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Socket set
Parts Used:
395508, 692206, 391681
Removed the gas tank carburetor and then the carburetor and cleaned all. Replaced the Spring-Pump Diaphragm, Needle-Valve Kit, Diaphragm-Carburetor. Put all back together and reinstalled the gas tank carburetor. Took a little time to get the engine started, then adjust the speed and the engine runs with no more surging.
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Lawn Mower wouldn\'t start

David from Arlington, Texas

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Screw drivers, Socket set, Wrench set
Parts Used:
493982S, 796112S, 391681, 270579S
I refused to send my vintage 1979 R & S lawn mower, (a now defunct lawn mower manufacturer from Fort Worth), to that great \"lawn and garden supply store in the sky\". I repaired it so it can mow the lawn another season. I keep the oil changed regularly and keep the blade sharp and balanced. The most frequently replaced part is the carbur etor diaphragm. Disassembling and cleaning the carburetor, then replacing the diaphragm was the major problem keeping it from running well. These ethanol-based fuels aren\'t helping things very much.
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Was not getting gas to the carburetor

Robert from Manahawkin, New Jersey

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable)
Parts Used:
395508, 497413S, 391681, 297219S
Removed carb
Removed intake tubes
Removed old gasket/diaphragm
Removed needle valve
Cleaned carb with carb cleaner making sure all holes and crevices were clean use a small brush to help
Replace all parts with new parts
Put back together
Started perfectly
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Motor would only run a few seconds then stall

ROBERT from CARO, Michigan

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Wrench set
Parts Used:
690766, 692206, 391681, 270344S
Followed instructions that came with parts.
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Very hard to start and ran very rough consuming much more gas than normal

Robert from AUBURN HILLS, Michigan

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Screw drivers, Socket set
Parts Used:
391681
1. Removed speed control cable from carburetor throttle.
2. Removed carburetor air cleaner.
3. Removed carburetor from engine
4. Disassembled carburetor, cleaned all parts.
5. Assembled carburetor using new pump diaphragm.
6. Tested. Engine ran like new after repair.
Total time 2 hours
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP8966318
Manufacturer Part Number: 391681
Brand Model Number Description
Lawn Boy 0363 Lawn Mower - Lawn Boy Lawn Mower Model 0363 Parts
Briggs and Stratton 092901-0229-99 Engine - Engine
Briggs and Stratton 092901-0265-99 Engine - Engine
Briggs and Stratton 092901-0351-99 Engine - Engine
Briggs and Stratton 092901-0419-99 Engine - Engine
Briggs and Stratton 092901-0771-99 Engine - Engine
Briggs and Stratton 092901-0928-99 Engine - Engine
Briggs and Stratton 092901-1099-99 Engine - Engine
Briggs and Stratton 092902 Engine - Briggs & Stratton Small Engine Model 092902/0981-99 (092902/098199, 092902/0981 99) Parts
Briggs and Stratton 092902-0015-99 Engine - Engine
Briggs and Stratton 092902-0016-99 Engine - Engine
Briggs and Stratton 092902-0017-99 Engine - Engine
Briggs and Stratton 092902-0018-99 Engine - Engine
Briggs and Stratton 092902-0019-99 Engine - Engine
Briggs and Stratton 092902-0020-99 Engine - Engine
Briggs and Stratton 092902-0021-99 Engine - Engine
Briggs and Stratton 092902-0022-99 Engine - Engine
Briggs and Stratton 092902-0023-99 Engine - Engine
Briggs and Stratton 092902-0024-99 Engine - Engine
Briggs and Stratton 092902-0028-99 Engine - Engine
Briggs and Stratton 092902-0029-99 Engine - Engine
Briggs and Stratton 092902-0090-99 Engine - Engine
Briggs and Stratton 092902-0101-99 Engine - Engine
Briggs and Stratton 092902-0115-99 Engine - Engine
Briggs and Stratton 092902-0116-99 Engine - Engine
Briggs and Stratton 092902-0117-99 Engine - Engine
Briggs and Stratton 092902-0118-99 Engine - Engine
Briggs and Stratton 092902-0132-99 Engine - Engine
Briggs and Stratton 092902-0133-99 Engine - Engine
Briggs and Stratton 092902-0134-99 Engine - Engine