Lawn & Garden Engine

Model # HSK850-8303B Official Tecumseh engine

Here are the diagrams and repair parts for Official Tecumseh HSK850-8303B engine, as well as links to manuals and error code tables, if available.

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HSK850-8303B Engine
Lamination 34443A
#100

Engine 71-143 hsk850-8303b diagram

Lamination

Part #34443A

Replaced by #34443D

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Manufacturer substitution
This part replaces 34443A. Substitute parts can look different from the original.
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$40.75
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Gasket 27110
#44

Carburetor 632642 (71/143) 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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$2.49
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Lawn & Garden Equipment Engine Fuel Line (replaces 32180, 32180a, 32180b, 500236, Tc-32180c) 32180C
#351

Engine 71-143 hsk850-8303b diagram

Lawn & garden equipment engine fuel line (replaces 32180, 32180a, 32180b, 500236, tc-32180c)

Part #32180C

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Lawn & Garden Equipment Torx Screw 30063
#361

Engine 71-143 hsk850-8303b diagram

Lawn & garden equipment torx screw

Part #30063

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$2.49
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Troybilt Carburetor Float 631024
#27

Carburetor 632642 (71/143) diagram

Troybilt carburetor float

Part #631024

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Lawn & Garden Equipment Engine Recoil Starter Handle (replaces 590443, 590452) 590701
Lawn & garden equipment engine recoil starter handle (replaces 590443, 590452)

Part #590701

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$7.80
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Lawn & Garden Equipment Engine Carburetor Float Pin 631022
#31

Carburetor 632642 (71/143) diagram

Lawn & garden equipment engine carburetor float pin

Part #631022

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$2.49
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Carburetor Lawn & Garden Equipment Engine Gasket 27554
#33

Carburetor 632642 (71/143) diagram

Carburetor lawn & garden equipment engine gasket

Part #27554

This item is not returnable
$2.49
29% OFF Phone Price : $3.49
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Primer 570629A
#350

Engine 71-143 hsk850-8303b diagram

Primer

Part #570629A

Replaced by #570629B

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Manufacturer substitution
This part replaces 570629A. Substitute parts can look different from the original.
This item is not returnable
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Troybilt Lawn & Garden Equipment Washer 650815
#92

Engine 71-143 hsk850-8303b diagram

Troybilt lawn & garden equipment washer

Part #650815

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

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

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

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

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

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

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

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

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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

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

How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.…

Repair difficulty
Time required
 15 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.

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Top questions about Sears and Sears PartsDirect

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What are the main components of a lawn mower?

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