Carburetor for Husqvarna 445, 450 and Jonsered CS2245, CS2250 Chainsaws

Description

This Husqvarna 445 carburetor is an aftermarket replacement for selected Husqvarna 445 and 450 series chainsaws, as well as compatible Jonsered CS2245 and CS2250 models. It replaces a worn, blocked or damaged carburetor that no longer supplies the engine with the correct fuel-and-air mixture.

The applicable Husqvarna illustrated parts list identifies the original carburetor arrangement as C1M-EL37B under reference 506 45 04-01. A later service reference, 531 21 56-01, supersedes that number. However, production revisions can differ, so buyers should compare the reference number and physical layout before ordering.

Husqvarna 445 carburetor compatibility

The replacement carburetor suits selected versions of:

• Husqvarna 445
• Husqvarna 445 E-Series
• Husqvarna 445 II
• Husqvarna 445 E-Series II
• Husqvarna 450
• Husqvarna 450 E-Series
• Husqvarna 450 II
• Husqvarna 450 E-Series II
• Husqvarna 450 Rancher
• Jonsered CS2245
• Jonsered CS2250

Comparison references:

• 506 45 04-01
• 506450401
• 531 21 56-01
• 531215601
• C1M-EL37B

These references identify the relevant carburetor configuration. Nevertheless, the replacement part is aftermarket and should not be described as a genuine Zama or Husqvarna component.

Important fitment checks

Before ordering, compare:

• Mounting-hole positions
• Intake and air-filter faces
• Throttle linkage
• Choke mechanism
• Fuel and return-hose connections
• Purge connection
• Adjustment-screw arrangement

Chainsaws sold under the same model name can use different carburetor revisions according to production date and market. Therefore, the model name alone may not confirm compatibility.

Before fitting the replacement, inspect the intake boot, impulse passage, fuel hoses, fuel filter and air filter. Additionally, check the cylinder and crankcase for air leaks. A leaking intake system can create a lean mixture even when the carburetor operates correctly.

After installation, adjust idle speed and fuel mixture according to the applicable service procedure. The chain must remain stationary at idle, while the engine should accelerate cleanly without hesitation. Browse more chainsaw parts for compatible filters, fuel hoses, ignition components and engine parts.