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Oil Seal

Part Number: 391086S

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Questions & Answers

Repair Instructions

*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.

Warning: California's Proposition 65

Compatibility

This part is compatible with the following machines:

Briggs and Stratton

19K400 Series (0110-0115) Engine
19E400 Series (0069-1168) Engine
19F400 Series (0043-1137) Engine
19G400 Series (0068-1196) Engine
19A400 Series Engine

19B400 Series Engine
19C400 Series Engine
1149-0 Portable Generator
8799-1 Portable Generator
9085-4 4,000 Watt Generator

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

See more of the 150+ compatible machines

Products Compatibility

This item works with the following types of products:

• Engine
• Generator
• Lawn Mower
• Lawn Tractor
• Snowblower

Questions & Answers

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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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Tool Type:

Lawn Tractor

Parts Used:

Oil Seal - 795387

Oil Seal - 391086S

Seal-O Ring - 690589

Spring-Governor (White) - 698071

Spring-Governed Idle - 691019

Link-Throttle (Used With Plastic Intake Manifold) - 695238

Washer (Governor Gear) - 690412

Bracket-Control - 592661

Retainer-Governor Shaft - 698290

Seal-Governor Shaft - 790574

Exhaust Gasket - 690970

Gear-Governor - 793338

Repair Difficulty:

Easy

Time Spent Repairing:

More than 2 hours

Tools Used:

Screwdriver, Pliers, Socket set, Wrench Set, Adjustable Wrench

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

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 ...

Reviews

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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