Model # 21758880 Official Craftsman 7.5-hp outboard motor

Here are the diagrams and repair parts for Official Craftsman 21758880 7.5-hp outboard motor, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 299 parts |

#14

Carburetor - no. 631647 diagram

Float

Part #631023

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

#43

Engine - type no. 640-06 diagram

Cover

Part #610118

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

#17

Twist grip diagram

Lock nut

Part #2632

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

#59

Engine - type no. 640-06 diagram

Spring

Part #630766

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

#77

Engine - type no. 640-06 diagram

Starter

Part #590420

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

#21

Carburetor - no. 631647 diagram

Gasket

Part #631334

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

Screw

Part #650506

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

Boat motor cotter pin, 3/32 x 1-in

Part #6405

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

Boat Motor Propeller Shaft Oil Seal 96014

#41

Gear housing diagram

Boat motor propeller shaft oil seal

Part #96014

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

#12

Gear housing diagram

Spiral pin

Part #7069

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

Symptoms for gas walk-behind mowers

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Why does my lawn mower run rough?

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

Why does my lawn mower cut unevenly?

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

Why does my lawn mower vibrate a lot?

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

Why won't my lawn mower start?

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

Why does my lawn mower stall?

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

Why won't my lawn mower move?

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

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.

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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 blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty

Time required

15 minutes or less

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty

Time required

45 minutes or less

Articles and videos for gas walk-behind mowers

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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Model # 21758880 Official Craftsman 7.5-hp outboard motor

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas walk-behind mowers

Why does my lawn mower run rough?

Why does my lawn mower cut unevenly?

Why does my lawn mower vibrate a lot?

Why won't my lawn mower start?

Why does my lawn mower stall?

Why won't my lawn mower move?

Repair guides for gas walk-behind mowers

How to replace a lawn mower spark plug

How to replace a lawn mower blade

How to replace a lawn mower flywheel key on a flathead engine

Articles and videos for gas walk-behind mowers

Tapping into a new feature in the Search Bar on Sears PartsDirect

How to remove a lawn mower blade using a removal tool

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

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