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Model # 16644 Official Sears scooter

Here are the diagrams and repair parts for Official Sears 16644 scooter, 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 79 parts  |
Snap Ring 90486795
#40

Power head module assembly diagram

Snap ring

Part #90486795

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

Motor-front 90730317
#16

Power head module assembly diagram

Motor-front

Part #90730317

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

Washer-neoprene 90730509
#37

Power head module assembly diagram

Washer-neoprene

Part #90730509

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

Rivet 90530810
#35

Power head module assembly diagram

Rivet

Part #90530810

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

No. 8 Lock Washers 90478632
#41F

Power head module assembly diagram

No. 8 lock washers

Part #90478632

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

Handle Bar Assembly-straight, Right Hand 90730255
#3

Mobie premier segments diagram

Handle bar assembly-straight, right hand

Part #90730255

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

Battery Box 90730425
#13

Battery box assembly diagram

Battery box

Part #90730425

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

12 Volt Gel Cell Battery 90730690
#8

Battery box assembly diagram

12 volt gel cell battery

Part #90730690

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

Cable Tie 90730309
#9

Frame assembly-long & medium diagram

Cable tie

Part #90730309

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

Power Head Socket Assembly (for Mobies Prior To Serial Number 2454686:) 90730720
#9

Power head module assembly diagram

Power head socket assembly (for mobies prior to serial number 2454686:)

Part #90730720

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

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

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Why does my pressure washer spray too hard?

Main causes: faulty unloader valve, bad pressure regulator…

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Why won't my pressure washer engine start?

Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…

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Why does my pressure washer's engine lose power?

Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…

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Why won't the pressure washer starter rope retract?

Main causes: broken recoil spring, damaged recoil starter…

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Why is smoke coming from the pressure washer's exhaust?

Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…

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Why does water spray out of my pressure washer's pressure relief valve?

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…

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Why is the spray from my pressure washer weak?

Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…

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Why won't my pressure washer mix in the detergent?

Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…

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Why doesn't my pressure washer recoil starter work?

Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…

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Repair guides for gas pressure washers

These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

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How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

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Repair difficulty
Time required
 15 minutes or less
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

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Repair difficulty
Time required
 45 minutes or less
How to replace a pressure washer pump

How to replace a pressure washer pump

The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the ch…

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Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas pressure washers

Use the advice and tips in these articles and videos to get the most out of your pressure washer.

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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.…

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

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

Learn about a new feature added to the Search Bar on Sears PartsDirect…

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7 steps for winterizing and storing a pressure washer

7 steps for winterizing and storing a pressure washer

Follow this advice to winterize your pressure washer.…

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