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Briggs and Stratton Parts

Oil Seal

Part Number: 391086S
Briggs and StrattonToroMurray
Availability: 25+ in stock
Price: $4.62
Quantity:
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*This part replaces obsolete part #: and 391086.

Product Information
Manufacturer: Briggs and Stratton, Toro, Murray
Product Number: 391086S
Classification: Part
Weight: 0.10 lbs.
Shipping: Ships Worldwide
Description:
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.
Compatibility

This part is compatible with the following machines:

Briggs and Stratton
Toro
38580 (5900001-5999999)(1995) Snowthrower
38580 (4900001-4999999)(1994) Snowthrower
38580 (3900001-3999999)(1993) Snowthrower
38580 (2000001-2999999)(1992) Snowthrower
38580 (1000001-1999999)(1991) Snowthrower
38580 (0000001-0999999)(1990) Snowthrower
38580 (9000001-9999999)(1989) Snowthrower
38580 (8000001-8999999)(1988) Snowthrower
38160 (7000001-7999999)(1987) Snowthrower
38160 (6000001-6999999)(1986) Snowthrower
38160 (5000001-5999999)(1985) Snowthrower
38160 (4000001-4999999)(1984) Snowthrower
38160 (3000001-3999999)(1983) Snowthrower
38160 (2000001-2999999)(1982) Snowthrower
38160 (0000001-0999999)(1980) Snowthrower
38160 (9000001-9999999)(1979) Snowthrower
38095 (0000001-0999999)(1980) Snowthrower
38070 (8000001-8999999)(1978) Snowthrower
38060 (8000001-8999999)(1978) Snowthrower
31995 (7000001-7999999)(1977) Snowthrower
31995 (6000001-6999999)(1976) Snowthrower
31995 (5000001-5999999)(1975) Snowthrower
38090 (7000001-7999999)(1987) Snowthrower
38090 (6000001-6999999)(1986) Snowthrower
38090 (5000001-5999999)(1985) Snowthrower
38090 (4000001-4999999)(1984) Snowthrower
38090 (3000001-3999999)(1983) Snowthrower
38090 (2000001-2999999)(1982) Snowthrower
38090 (1000001-1999999)(1981) Snowthrower
38090 (0000001-0999999)(1980) Snowthrower
38090 (9000001-9999999)(1979) Snowthrower
38095 (7000001-7999999)(1987) Snowthrower
38095 (6000001-6999999)(1986) Snowthrower
38095 (5000001-5999999)(1985) Snowthrower
38095 (4000001-4999999)(1984) Snowthrower
38095 (3000001-3999999)(1983) Snowthrower
38095 (2000001-2999999)(1982) Snowthrower
38095 (1000001-1999999)(1981) Snowthrower
38150 (7000001-7999999)(1987) Snowthrower
38150 (6000001-6999999)(1986) Snowthrower
38150 (5000001-5999999)(1985) Snowthrower
38150 (4000001-4999999)(1984) Snowthrower
38150 (2000001-2999999)(1982) Snowthrower
38150 (1000001-1999999)(1981) Snowthrower
38150 (0000001-0999999)(1980) Snowthrower
38150 (9000001-9999999)(1979) Snowthrower
38155 (7000001-7999999)(1987) Snowthrower
38155 (6000001-6999999)(1986) Snowthrower
38155 (5000001-5999999)(1985) Snowthrower
38155 (4000001-4999999)(1984) Snowthrower
38155 (2000001-2999999)(1982) Snowthrower
38155 (1000001-1999999)(1981) Snowthrower
38565 (9000001-9999999)(1989) Snowthrower
38565 (8000001-8999999)(1988) Snowthrower
38566 (59000001-59999999)(1995) Snowthrower
38566 (49000001-49999999)(1994) Snowthrower
38566 (3900001-3999999)(1993) Snowthrower
38566 (2000001-2999999)(1992) Snowthrower
38566 (1000001-1999999)(1991) Snowthrower
38566 (0000001-0999999)(1990) Snowthrower
38570 (5900001-5999999)(1995) Snowthrower
38570 (4900001-4999999)(1994) Snowthrower
38570 (3900001-3999999)(1993) Snowthrower
38570 (2000001-2999999)(1992) Snowthrower
38570 (1000001-1999999)(1991) Snowthrower
38570 (0000001-0999999)(1990) Snowthrower
38570 (8000001-8999999)(1988) Snowthrower
58170 (3000001-3999999)(1983) Tiller
71286 (250000001-250999999)(2005) Lawn Tractor
71286 (260000001-260999999)(2006) Lawn Tractor
71286 (270000001-270999999)(2007) Lawn Tractor
71300 (200000001-200999999)(2000) Lawn Tractor
71301 (210000001-210999999)(2001) Lawn Tractor
71427 (250000001-250999999)(2005) Lawn Tractor
71428 (250000001-250999999)(2005) Lawn Tractor
71429 (250000001-250999999)(2005) Lawn Tractor
30102 (1000001-1999999)(1991) Lawn Mower
30102 (0000001-0999999)(1990) Lawn Mower
30102 (9000001-9999999)(1989) Lawn Mower
30102 (8000001-8999999)(1988) Lawn Mower
30103 (9000001-9999999)(1989) Lawn Mower
30103 (8000001-8999999)(1988) Lawn Mower
30108 (4000001-4999999)(1984) Lawn Mower
30111 (7000001-7999999)(1987) Lawn Mower
30111 (6000001-6999999)(1986) Lawn Mower
30111 (5000001-5999999)(1985) Lawn Mower
30111 (4000001-4999999)(1984) Lawn Mower
30116 (9000001-9999999)(1989) Lawn Mower
30116 (8000001-8999999)(1988) Lawn Mower
30116 (7000001-7999999)(1987) Lawn Mower
30116 (6000001-6999999)(1986) Lawn Mower
30116 (5000001-5999999)(1985) Lawn Mower
74301 (230000001-230999999)(2003) Lawn Tractor
74301 (240000001-240000893)(2004) Lawn Tractor
74301 (240000894-240999999)(2004) Lawn Tractor
74301 (250000001-250999999)(2005) Lawn Tractor
74325 (230000001-230999999)(2003) Lawn Tractor
74325 (240000001-240999999)(2004) Lawn Tractor
74325 (250000001-250999999)(2005) Lawn Tractor
74327 (260000001-260019999)(2006) Lawn Tractor
74327 (260020000-260999999)(2006) Lawn Tractor
74330 (230000001-230999999)(2003) Lawn Tractor
74330 (240000001-240001179)(2004) Lawn Tractor
74330 (240001180-240999999)(2004) Lawn Tractor
74330 (250000001-250999999)(2005) Lawn Tractor
74350 (230000001-230999999)(2003) Lawn Tractor
74350 (240000001-240000178)(2004) Lawn Tractor
74350 (240000179-240999999)(2004) Lawn Tractor
74351 (240000001-240999999)(2004) Lawn Tractor
74352 (250000001-250999999)(2005) Lawn Tractor
74353 (260000001-260999999)(2006) Lawn Tractor
74402 (230000001-230999999)(2003) Lawn Tractor
74402 (240000001-240999999)(2004) Lawn Tractor
74402 (250000001-250999999)(2005) Lawn Tractor
74402 (260000001-260999999)(2006) Lawn Tractor
74403 (230000001-230999999)(2003) Lawn Tractor
74403 (240000001-240999999)(2004) Lawn Tractor
74403 (250000001-250999999)(2005) Lawn Tractor
74403 (260000001-260999999)(2006) Lawn Tractor
S2-12B502 (1000001-1999999)(1991) Lawn Tractor
R3-10B404 (2000001-2999999)(1992) Lawn Tractor
R3-10B404 (3900001-3999999)(1993) Lawn Tractor
R3-12B602 (2000001-2999999)(1992) Lawn Tractor
74501 (210000001-210999999)(2001) Lawn Tractor
74501 (220000001-220999999)(2002) Lawn Tractor
74502 (230000001-230999999)(2003) Lawn Tractor
74502 (220000001-220999999)(2002) Lawn Tractor
74570 (200000001-200999999)(2000) Lawn Tractor
74570 (210000001-210999999)(2001) Lawn Tractor
74570 (220000001-220999999)(2002) Lawn Tractor
74570 (230000001-230999999)(2003) Lawn Tractor
74570 (240000001-240999999)(2004) Lawn Tractor
74570 (250000001-250999999)(2005) Lawn Tractor
74570 (260000001-260999999)(2006) Lawn Tractor
74571 (240000001-240999999)(2004) Lawn Tractor
74571 (250000001-250999999)(2005) Lawn Tractor
74571 (260000001-260999999)(2006) Lawn Tractor
74590 (200000001-200999999)(2000) Lawn Tractor
74590 (210000001-210999999)(2001) Lawn Tractor
74590 (220000001-220999999)(2002) Lawn Tractor

Products Compatibility

This item works with the following types of products:

  • • Engine
  • • Generator
  • • Lawn Mower
  • • Lawn Tractor
  • • Snowblower
Questions & Answers

No questions have been asked yet
Repair Instructions: Submitted by Customers Like You
3 of 3 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Rocker Cover Gasket - 690971
Oil Seal - 391086S
Crankcase Gasket With Bolts - 594195
Rod-Connecting (Standard) - 796209
Cylinder Head Gasket - 693997
Piston Assembly (Standard) - 792023
Repair Difficulty:
Hard
Time Spent Repairing:
More than 2 hours
Tools Used:
Socket set, Wrench Set
26 hp B/S twin broken rod repair
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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2 of 2 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Oil Seal - 391086S
Tube-Breather - 692293
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Socket set, Wrench Set, Adjustable Wrench
My engine on my Simplicity tractor lost its lower oil seal.
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 tractor. 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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2 of 2 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Crankcase Gasket - 697110
Oil Seal - 391086S
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Socket set, Wrench Set, Item to drive the oil seal in to place.
Leaked oil
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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2 of 2 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Oil Seal - 391086S
Gasket-Crankcase - 270916
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Socket set, Wrench Set, Adjustable Wrench
Crankcase gasket and oil seal leaking on an old lawn tractor
Removed engine drained oil, removed the crankcase cover.
Replaced gasket and the new oil seal
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governor was broke
took motor out , made repairs ..
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Tool Type:
Engine
Parts Used:
Gasket Set-Engine - 695438
Valve Seal - 690968
Oil Seal - 391086S
Crankshaft - 794874
Repair Difficulty:
Expert
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, Adjustable Wrench, Impact wrench, feeler gauges, locktite, fine sand paper
piston shaft broke
1. I called in a professional friend.
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Tool Type:
Engine
Parts Used:
Cap-Oil Fill - 281658S
Flywheel Key - 222698S
Oil Seal - 391086S
Oil Seal - 299819S
Element-Air Cleaner - 270093
Cover-Air Cleaner - 221468
Cup-Air Cleaner - 280001
Gasket Set-Engine - 299101
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Pliers, Wrench Set
motor had set outside for too many years.
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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Tool Type:
Lawn Tractor
Parts Used:
Oil Seal - 391086S
Gasket-Crankcase (.015 Thick) - 692226
Oil Seal - 291675S
Repair Difficulty:
Easy
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set
Lower seal on motor leaked
1. Disconnect starter wires, carburator cable and gas hose drain oil
2. Remove drive belt pulley and belt
3. Unbolt motor and lift off frame
4. Turn motor upside down unbolt sump pan
6. Remove seal from pan, clean and install new seal and sump gasket
7. Reverse steps, refill oil make all connections
8. Start and check for any leaks
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Tool Type:
Lawn Tractor
Parts Used:
Oil Seal - 391086S
Rod-Connecting - 490348
Pin-Piston/Standard - 299691
Dipstick Tube Seal - 281370S
Tube-Breather - 692253
Gasket Set-Engine - 494241
Spark Plug - 796112S
Piston - 499284
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Socket set, Wrench Set
Burning oil.
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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Tool Type:
Lawn Tractor
Parts Used:
Crankcase Gasket - 697110
Camshaft - 793880
Rocker Cover Gasket - 272475S
Oil Seal - 391086S
Repair Difficulty:
Easy
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Socket set, Wrench Set, Torque wrench
Decompression on the cam broke.
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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Discussion
Discussion for Oil Seal - ( 391086S )
Discussion is closed. To ask our experts a question about a part, use the Q&A feature.
Question: Briggs And Stratton

skintrogers

can the lower end crankshaft seal be replaced from outside the engine model 44p777 26 hp
WJA
This an answer that ShotOut has answered to the same question.

Hi skintrogers It is pressed into place in the crankcase. They make a special tool called a seal puller for it, but it is just about as easy to just remove the crankcase cover. Then, you won't have to buy the specialty tool. You won't have to break the engine down, just remove the cover, remove the seal, and reinstall a new one.

By ShotOut
skintrogers and WJA Thanks WJA. Skintrogers, Installation on these worries some folks, since they are pressed in place and somewhat easily damaged. You can use a standard socket the approximate size of the seal diameter to help "press" a new one back into place. Just tap gently until it seats. Removing the old one isn't too hard either. If you PRY it out of the case, (especially with it still on the crank) you risk marring or nicking the aluminum surrounding it, possibly resulting in a leak even with new seal installed. That is why I suggest removing the case. If you damage the OLD seal when removing it (and you might if you dont use a socket to tap it out also), no big loss.
If one works very carefully and has some experience at this, he MIGHT be able to remove it without damaging the case, but it is NOT worth the risk.
Question: Oil Seal

skintrogers

can the crankshaft oil seal on bottom of engine be replaced without breaking engine down
Hi skintrogers It is pressed into place in the crankcase. They make a special tool called a seal puller for it, but it is just about as easy to just remove the crankcase cover. Then, you won't have to buy the specialty tool. You won't have to break the engine down, just remove the cover, remove the seal, and reinstall a new one.

link removed to Replace Crankshaft Oil Seal and Crankcase Gasket on ...
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  • part worked as advertised
    Fit perfectly and contained oil as required.
    Bill - September 26, 2019 Verified Purchase
    Replace an oil seal on an old engine.
    I was surprised to find an oil seal to replace the one on a 42 year old engine. The seal fit perfectly and solved the problem. Great service!!
    Lawrence - September 3, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: Briggs and Stratton, Toro, Murray
    Product Number: 391086S
    Classification: Part
    Weight: 0.10 lbs.
    Shipping: Ships Worldwide
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