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13AL78XT091 MTD Lawn Tractor - Overview

Sections of the 13AL78XT091

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Engine Oil Seal – Part Number: 795387
Engine Oil Seal
★★★★★
★★★★★
(2)
PartSelect #: PS9151828
Manufacturer #: 795387
This OEM Seal-Oil (PTO Side), also called the Oil Seal, is a Black, Nitrile Rubber, 2/14 O.D., individually sold part which is installed using a Seal Puller. Customers rate the installation difficulty...
$7.88
  In Stock
Spark Plug – Part Number: 491055S
Spark Plug
★★★★★
★★★★★
(2)
PartSelect #: PS9281094
Manufacturer #: 491055S
$4.99
  In Stock
Engine Oil Seal – Part Number: 391086S
Engine Oil Seal
★★★★★
★★★★★
(1)
PartSelect #: PS9277860
Manufacturer #: 391086S
The Oil Seal is a manufacturer-approved rubber part which provides a seal between the crankcase and crankshaft by attaching around the axle shaft on the crankhouse housing. Installation is rated as "M...
$6.59
  In Stock
Engine Valve Gasket Set – Part Number: 794152
Engine Valve Gasket Set
★★★★★
★★★★★
(1)
PartSelect #: PS9141388
Manufacturer #: 794152
Enhance the performance and longevity of your engine equipment with this high-quality Gasket Set-Valve from the well-renowned brand, Briggs and Stratton. This set comprises of multiple robust gaskets ...
$35.23
  In Stock
Engine Oil Filter – Part Number: 696854
Engine Oil Filter
PartSelect #: PS9065087
Manufacturer #: 696854
$14.38
  In Stock
Engine O-Ring – Part Number: 691917
Engine O-Ring
★★★★★
★★★★★
(1)
PartSelect #: PS9294749
Manufacturer #: 691917
The Seal-O Ring, also known as the gasket, is red in color, made of rubber, and is an OEM part that requires some skill to replace. This part is designed to create a seal between the carburator and ma...
$4.99
  Special Order
Engine Breather Tube – Part Number: 794683
Engine Breather Tube
PartSelect #: PS9306838
Manufacturer #: 794683
$8.91
  In Stock
Engine Intake Push Rod – Part Number: 692003
Engine Intake Push Rod
★★★★★
★★★★★
(2)
PartSelect #: PS9294769
Manufacturer #: 692003
$8.61
  In Stock
Lawn Mower Key – Part Number: 925-1745A
Lawn Mower Key
★★★★★
★★★★★
(2)
PartSelect #: PS9310468
Manufacturer #: 925-1745A
This manufacturer-certified Ignition Key comes in black/silver and is used in the ignition slot to turn on the engine. If your key becomes damaged or lost (which these small keys easily are), this pa...
$18.33
  In Stock
Fuel Filter – Part Number: 394358B
Fuel Filter
PartSelect #: PS17016257
Manufacturer #: 394358B
This Fuel Filter is a white plastic part attached within the fuel delivery system between the fuel tank and carburetor. Installation is rated as "Easy" and requires a set of pliers and a screwdriver. ...
$3.99
  In Stock
Lawn Mower Deck Engage Cable – Part Number: 946-05124A
Lawn Mower Deck Engage Cable
PartSelect #: PS11813377
Manufacturer #: 946-05124A
$30.53
  In Stock
Engine Crankcase Gasket – Part Number: 697110
Engine Crankcase Gasket
PartSelect #: PS9076878
Manufacturer #: 697110
$7.88
  In Stock

Questions And Answers for 13AL78XT091

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Common Symptoms of the 13AL78XT091

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Deck blades will not turn
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Excess blue smoke from engine
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
Stopped running. Turned to be a bent intake push rod and broken rocker arm
Removed head. Replaced both rocker arms, intake pus rod, push rod guide exhaust and head gaskets. Torqued head in 3 stages to 216 in/lbs. gapped intake to .004 and exhaust to .006 at TDC

Added oil and gas. Now running great

If you need to replace push rods use steel (exhaust) they are the same length
The engine was a Briggs & Stratton 217802 0113 E10604 (2006 year date code)
I used the following
796189 gasket
272475S gasket
697494 push rod
690822 push rod guide
691751 rocker arms
Parts Used:
Engine Rocker Arm Engine Push Rod Guide
  • Rene from COVINGTON, LA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    1- 2 hours
  • Tools:
    Nutdriver, Socket set, Wrench set
6 of 9 people found this instruction helpful.
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Gas leaking from tube breather
First I opened the top of the mower to expose the housing cover. Secondly I removed the four housing bolts to remove the housing cover from the mower. Next I removed the tube breather and installed the new tube breather and replaced the housing cover with the four bolts previously removed and closed the top of the mower. I filled the mower with gas to check for leaks which weren't any leaks. I proceeded to mow the lawn with ease.
Parts Used:
Engine Breather Tube
  • Emanuel from FERRIDAY, LA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Socket set
7 of 22 people found this instruction helpful.
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