Front-Engine Lawn Tractor

Model # LT12 Official Jacobsen lawn tractor

Here are the diagrams and repair parts for Official Jacobsen LT12 lawn tractor, as well as links to manuals and error code tables, if available.

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Browse Parts for
LT12 Riding Mowers & Tractors
Gas Tank JA-39737-9
#11

Control panel, battery and gas tank diagram

Gas tank

Part #JA-39737-9

The manufacturer no longer makes this part, and there's no substitute part

Pin JA-46140-8
#28

Steering linkage diagram

Pin

Part #JA-46140-8

The manufacturer no longer makes this part, and there's no substitute part

Screw JA-40018-8
#32

Cowlings, rear fender and seat assembly diagram

Screw

Part #JA-40018-8

The manufacturer no longer makes this part, and there's no substitute part

Knob JA-37607-8
#13

Frame transaxle and engine diagram

Knob

Part #JA-37607-8

The manufacturer no longer makes this part, and there's no substitute part

Gas Tnk Strp JA-99098-0
#13

Control panel, battery and gas tank diagram

Gas tnk strp

Part #JA-99098-0

The manufacturer no longer makes this part, and there's no substitute part

Pop Rivet JA-46484-2
#46

Cowlings, rear fender and seat assembly diagram

Pop rivet

Part #JA-46484-2

The manufacturer no longer makes this part, and there's no substitute part

Bushing JA-30990-2
#18

Lift, brake and clutch linkage diagram

Bushing

Part #JA-30990-2

The manufacturer no longer makes this part, and there's no substitute part

Spring JA-31534-4
#14

Lift, brake and clutch linkage diagram

Spring

Part #JA-31534-4

The manufacturer no longer makes this part, and there's no substitute part

Light Retainer JA-33962-6
#24

Cowlings, rear fender and seat assembly diagram

Light retainer

Part #JA-33962-6

The manufacturer no longer makes this part, and there's no substitute part

Hood Keeper JA-99132-1
#22

Cowlings, rear fender and seat assembly diagram

Hood keeper

Part #JA-99132-1

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: faulty battery, bad alternator…

Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Most common repair guides to help fix your riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace the starter motor on a riding lawn mower

How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replac…

Repair difficulty
Time required
 30 minutes or less
How to rebuild a riding lawn mower carburetor

How to rebuild a riding lawn mower carburetor

Get your sputtering carburetor running smoothly in 60 minutes.…

Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower rear tire

How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…

Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…