Tecumseh
Lawn & Garden Engine

Model # HSK840-8203 Official Tecumseh gas engine

Here are the diagrams and repair parts for Official Tecumseh HSK840-8203 gas engine, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 93 parts  |

Needle Seat 631021
#2

Replacement parts diagram

Needle seat

Part #631021

Replaced by #631021B

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Manufacturer substitution
This part replaces 631021. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Recoil Starter Rope, 98-in (replaces 1258, 28288, 28358, 28528, 30971, 31285, 31395, 31396, 31696, 590451a, 590456, 590527, 730608, 740032) 590535
#12

Starter 590652 (71/143) diagram

Lawn & garden equipment engine recoil starter rope, 98-in (replaces 1258, 28288, 28358, 28528, 30971, 31285, 31395, 31396, 31696, 590451a, 590456, 590527, 730608, 740032)

Part #590535

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Gasket 27110
#21

Replacement parts diagram

Gasket

Part #27110

Replaced by #27110A

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Manufacturer substitution
This part replaces 27110. Substitute parts can look different from the original.
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Primer 570682
#350

Replacement parts diagram

Primer

Part #570682

Replaced by #570682A

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Manufacturer substitution
This part replaces 570682. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Recoil Starter Handle 590574
#355

Replacement parts diagram

Lawn & garden equipment engine recoil starter handle

Part #590574

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$6.39
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Troybilt Carburetor Float 631024
#6

Replacement parts diagram

Troybilt carburetor float

Part #631024

This item is not returnable
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Lawn & Garden Equipment Engine Recoil Starter Handle (replaces 590443, 590452) 590701
#13

Starter 590652 (71/143) diagram

Lawn & garden equipment engine recoil starter handle (replaces 590443, 590452)

Part #590701

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Lawn & Garden Equipment Engine Carburetor Float Bowl (replaces 631025, 631025l, 631867, 631867l) 631951
#16

Replacement parts diagram

Lawn & garden equipment engine carburetor float bowl (replaces 631025, 631025l, 631867, 631867l)

Part #631951

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Screw 650884
#287

Replacement parts diagram

Screw

Part #650884

Replaced by #650926

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Manufacturer substitution
This part replaces 650884. Substitute parts can look different from the original.
This item is not returnable
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Carburetor Lawn & Garden Equipment Engine Carburetor Bowl Drain Valve 27136A
#17

Replacement parts diagram

Carburetor lawn & garden equipment engine carburetor bowl drain valve

Part #27136A

This item is not returnable
$8.09
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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Repair guides for gas walk-behind mowers

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

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your lawn & garden engines

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…