Kenmore
Water Pump

Model # 3904 Official Kenmore plastic convertible jet pump

Here are the diagrams and repair parts for Official Kenmore 3904 plastic convertible jet pump, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Showing 10 of 54 parts  |

Pump Housing O-ring U9-199
#7I

Replacement parts diagram

Pump housing o-ring

Part #U9-199

This item is not returnable
$21.29
22% OFF Phone Price : $27.29
In Stock
Connector L43-5C

#NI

All parts diagram

Connector

Part #L43-5C

Back Order
Pump Check Valve (replaces N12-12p) N166-5P
#12

Replacement parts diagram

Pump check valve (replaces n12-12p)

Part #N166-5P

$123.89
9% OFF Phone Price : $135.89
Back Order
Impeller J105-8PA
#7D

Replacement parts diagram

Impeller

Part #J105-8PA

Replaced by #J105-8PAN

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Manufacturer substitution
This part replaces J105-8PA. Substitute parts can look different from the original.
$63.99
9% OFF Phone Price : $69.99
Back Order
Drain Cock U212-68
#13

Replacement parts diagram

Drain cock

Part #U212-68

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

Lock Nut U36-112C

#NI

All parts diagram

Lock nut

Part #U36-112C

Replaced by #U36-112ZP

?
Manufacturer substitution
This part replaces U36-112C. Substitute parts can look different from the original.
Back Order
Motor 3/4 Hp J218-596
#1B

Replacement parts diagram

Motor 3/4 hp

Part #J218-596

Replaced by #J218-596PKG

?
Manufacturer substitution
This part replaces J218-596. Substitute parts can look different from the original.
$622.10
$12.00 OFF Phone Price : $634.10
In Stock
Gauge U239-3
#3

Replacement parts diagram

Gauge

Part #U239-3

Replaced by #TC104-P2

?
Manufacturer substitution
This part replaces U239-3. Substitute parts can look different from the original.
$27.99
18% OFF Phone Price : $33.99
In Stock
Craftsman Gasket L20-40

#NI

All parts diagram

Craftsman gasket

Part #L20-40

In Stock
Pump Impeller J105-22PA
#7E

Replacement parts diagram

Pump impeller

Part #J105-22PA

$123.89
9% OFF Phone Price : $135.89
In Stock

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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
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 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

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.

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.…

Lawn mower won't start troubleshooting video: can't pull recoil pull cord

Lawn mower won't start troubleshooting video: can't pull recoil pull cord

A blade obstruction, bad recoil starter or locked-up engine can prevent the pull cord on your mower from working. See ho…

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