Part Location Diagram of 391086S Briggs and Stratton Engine Oil Seal
See part C-87 in the diagram
( Grid squares measure 1x1 inch )

Engine Oil Seal 391086S

Manufactured by:
Briggs and Stratton
ERP Number:
ERP9277860
Part Number:
391086S
Original Equipment Manufacturer ?
  Works with your model  23D-R6!
In Stock
Delivers in 3-5 Business Days!

A Bit Difficult 

More than 2 hours 

(16 rated repairs) ?
  Works with your model   23D-R6!

Product Description

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This is a genuine OEM sourced replacement part designed for use with a variety of lawn and garden equipment. This item fits the cylinder and helps to provide an air tight seal to prevent any leaks. It is made out of rubber and it is sold individually. You will need a wrench set to complete this repair.

Frequently Purchased Together

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Troubleshooting

This part works with the following brands:
  • Briggs and Stratton
  • Toro
  • Simplicity
  • Craftsman
  • Poulan
  • MTD
  • Murray
  • Ariens
  • Snapper
  • Jonsered
This part works with the following products:
  • Engine
  • Lawn Tractor
  • Lawn Mower
  • Snow Blower
  • Generator
Part# 391086S replaces these:
290932, 298423, 391086, 391086S, 690926,

Customer Part Reviews

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Average Rating (out of 5):
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(5 Reviews)
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Questions & Answers

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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.

A Bit Difficult 

More than 2 hours 

(16 rated repairs) ?
  • 1
  • 2
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Sorry, we couldn't find any existing installation instruction that matched.

Decompression on the cam broke.

Anthony from McConnells, South Carolina

24 of 24 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Screw drivers, Socket set, Wrench set
Parts Used:
84005207, 391086S, 697110, 272475S
Remove the engine, the engine shroud, and the sump cover. Then, removed the rocker box and the lifters. Push the rods, then, removed the cam. Clean parts, then, reassemble the parts.
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26 hp B/S twin broken rod repair

James from Hillsboro, Oregon

10 of 10 people found this instruction helpful.
Difficulty Level:
Difficult
Total Repair Time:
More than 2 hours
Tools:
Socket set, Wrench set
I disassembled the engine. made a list of parts. I looked up the torque values online and using the new parts reassembled the engine. It fired right off and ran smooth. The parts I received from Replacement parts fit perfectly and the price was right. They were delivered in a timely manner.
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My engine on my Simplicity tractor lost its lower oil seal.

Michael from Blountville, Tennessee

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
More than 2 hours
Tools:
Screw drivers, Socket set, Wrench (Adjustable), Wrench set
Parts Used:
391086S, 692293
I had to remove the 8HP engine and associated parts from the tractor.
I didn\'t have to break down the engine, but removed old seal.
Cleaned the area and used Loctite to re-install new oil seal
Used JB Weld under the seal to hopefully keep the seal in place.
Put engine and all associated parts back on the tract or. Engine did good and no leaks.
Replaced Tube breather on the Breather Assembly too.
Tractor is 48 years old and it\'s nice to know I can still get parts for it.
THANK YOU !!!!!!!!!!!!!!!
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Leaked oil

Richard from Austell, Georgia

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Socket set, Wrench set
Parts Used:
391086S, 697110
Remove the oil pan is all and then remove the oil seal from the oil pan and clean the old gasket and replace the new one, and replace the oil pan, everything worked good.
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Burning oil.

Paul from Plantsville, Connecticut

2 of 2 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
More than 2 hours
Tools:
Socket set, Wrench set
1. Disassembled the engine and the mower deck from the tractor.
2. Removed the defective parts and reinstalled new parts.
3. Reassembled.
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Crankcase gasket and oil seal leaking on an old lawn tractor

John from Danville, Indiana

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Socket set, Wrench (Adjustable), Wrench set
Parts Used:
391086S, 270916
Removed engine drained oil, removed the crankcase cover.
Replaced gasket and the new oil seal
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governor was broke

J.K. from Bridgeport, West Virginia

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
More than 2 hours
Tools:
Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
took motor out , made repairs ..
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My neighbors mower made a loud clunk and bang with lots of black smoke

Jerry from Auburn, Washington

0 of 1 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
More than 2 hours
Tools:
Screw drivers, Socket set, Wrench (Adjustable)
Parts Used:
594195, 690229, 391086S, 793647
They said I could have it so when I couldn\'t get it started I began looking into it and found the connecting rod and piston damaged on the number one cylinder. I ordered the parts necessary and completed the repair. The web site is very easy to navigate and shipping is quick.
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motor had set outside for too many years.

Sam from ELKHART, Indiana

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers, Wrench set
I could not repair the motor. The block had 2 cracks 3\" long on the corners on the same side.

I will keep the parts, because I have other motors that can use the same parts.
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lower case was leaking

roland from HARRISVILLE, Rhode Island

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
More than 2 hours
Tools:
Pliers, Screw drivers, Socket set, Wrench set
Parts Used:
391086S, 794389
disassembled interior motor cleaned it all up . valves job and all new gaskets, than put it all back together.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP9277860
Manufacturer Part Number: 391086S
Brand Model Number Description
Briggs and Stratton 01149-0 Generator - Briggs & Stratton Generator Model 01149-0 (011490, 01149 0) Parts
Briggs and Stratton 0749-01 Engine - Engine
Briggs and Stratton 08799-1 Generator - Briggs & Stratton Generator Model 08799-1 (087991, 08799 1) Parts
Briggs and Stratton 09085-4 Generator - Briggs & Stratton Generator Model 09085-4 (090854, 09085 4) Parts
Simplicity 1060E Snow Blower - Simplicity Snowblower Model 1060E Parts
Simplicity 1060M Snow Blower - Simplicity Snowblower Model 1060M Parts
Toro 110-6515 Engine
Briggs and Stratton 111902-0015-99 Engine - Engine
Briggs and Stratton 111902-0016-99 Engine - Engine
Briggs and Stratton 111902-0017-99 Engine - Engine
Briggs and Stratton 111902-0018-99 Engine - Engine
Briggs and Stratton 111902-0101-99 Engine - Engine
Briggs and Stratton 111902-0102-99 Engine - Engine
Briggs and Stratton 111902-0103-99 Engine - Engine
Briggs and Stratton 111902-0104-99 Engine - Engine
Briggs and Stratton 111902-0130-99 Engine - Engine
Briggs and Stratton 111902-0131-99 Engine - Engine
Briggs and Stratton 111902-0132-99 Engine - Engine
Briggs and Stratton 111902-0133-99 Engine - Engine
Briggs and Stratton 111902-0134-02 Engine - Engine
Briggs and Stratton 111902-0135-99 Engine - Engine
Briggs and Stratton 111902-0136-99 Engine - Engine
Briggs and Stratton 111902-0137-99 Engine - Engine
Briggs and Stratton 111902-0138-99 Engine - Engine
Briggs and Stratton 111902-0139-99 Engine - Engine
Briggs and Stratton 111902-0140-99 Engine - Engine
Briggs and Stratton 111902-0141-99 Engine - Engine
Briggs and Stratton 111902-0142-99 Engine - Engine
Briggs and Stratton 111902-0144-99 Engine - Engine
Briggs and Stratton 111902-0145-99 Engine - Engine