Solo
Gas Chainsaw

Model #645 Solo chainsaw

Here are the diagrams and repair parts for Solo 645 chainsaw, as well as links to manuals and error code tables, if available.


There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Save to my profile

Showing 10 of 198 parts

Leaf Blower Fuel Line

#16

Handle/cover Diagram

Leaf blower fuel line

Part #0064300
$14.13

In Stock

Fuel Hose

#172

Cylinder/ignition module Diagram

Fuel hose

Part #0064407
This item is not returnable
$4.56

In Stock

Lawn & Garden Equipment Engine Start/Stop Switch

#70

Cylinder/ignition module Diagram

$11.53

In Stock

Starter Grip

#8

Starter Diagram

Starter grip

Part #2074403
This item is not returnable
$3.33

In Stock

Chainsaw Recoil Starter Spring

#10

Starter Diagram

$14.95

In Stock

Screw

#145

Cylinder/ignition module Diagram

Screw

Part #0018274
This item is not returnable
$2.55

In Stock

Brake Band

#30

Cylinder/ignition module Diagram

Brake band

Part #6200131
$17.25

In Stock

Adjuster

#32

Cylinder/ignition module Diagram

Adjuster

Part #6300208
$12.00

In Stock

Trigger

#7

Handle/cover Diagram

Trigger

Part #2074979
This item is not returnable
$4.55

In Stock

Screw

#48

Handle/cover Diagram

Screw

Part #0018275
This item is not returnable
$2.16

In Stock

Symptoms for gas chainsaws

Choose a symptom to see related chainsaw repairs.

Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank
Main causes: stale gasoline, cracked fuel lines, dirty carburetor, damaged spark plug, worn piston rings
Main causes: bad gas, engine needs tune up, cracked fuel lines, dirty carburetor

Repair guides for gas chainsaws

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

February 1, 2014
By Lyle Weischwill
How to rebuild a chainsaw carburetor

If your chainsaw isn't running well, a dirty carburetor could be the problem. You can take it apart, clean it and rebuild it, using a carburetor rebuild kit. This repair guide takes you through the process.

Repair difficulty
Time required
 15 minutes or less
February 1, 2014
By Lyle Weischwill
How to replace a chainsaw carburetor

If the engine won't start even though there's fuel in the chainsaw, the carburetor could be the problem. Sometimes, it's easier to replace the carburetor than to clean it and rebuild it. Follow these steps to do the job yourself in about half an hour.

Repair difficulty
Time required
 15 minutes or less
February 1, 2014
By Lyle Weischwill
How to replace chainsaw fuel lines

The fuel line on a chainsaw becomes brittle over time and can crack. Replacing it doesn't require a lot of DYI experience. These instructions show you how.

Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas chainsaws

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

June 1, 2016

Chainsaw care and troubleshooting tips

By Sears PartsDirect staff

Learn the basics of taking care of your chainsaw and solving common problems.

March 1, 2016

How to sharpen a chainsaw

By Jeff Day

Find out how to sharpen a chainsaw.

May 1, 2015

5 tips for a hard-to-start chainsaw

By Sears PartsDirect staff

These tips may help you get your hard-to-start chainsaw running.