9 - TROUBLESHOOTING THE ENGINE

PROBLEM

Unit won’t start or starts but will not run.

Unit starts, but engine has low power.

Engine hesitates.

No power under load.

Runs erratically.

Smokes excessively.

PROBABLE CAUSE

Incorrect starting procedures.

Incorrect carburetor mixture adjustment setting.

Fouled spark plug

Fuel filter plugged.

Incorrect lever position on choke.

Dirty spark arrester screen.

Dirty air filter.

Incorrect carburetor mixture adjustment setting.

Incorrect carburetor mixture adjustment setting.

Incorrectly gapped spark plug.

Incorrect carburetor mixture adjustment setting.

Incorrect fuel mixture.

CORRECTIVE ACTION

Follow instructions in the User Manual.

Have carburetor adjusted by an Authorized Service Center.

Clean / gap or replace plug.

Replace fuel filter.

Move to RUN position.

Replace spark arrester screen.

Remove, clean and reinstall filter.

Have carburetor adjusted by an Authorized Service Center.

Have carburetor adjusted by an Authorized Service Center.

Clean / gap or replace plug.

Have carburetor adjusted by an Authorized Service Center.

Use properly mixed fuel (40:1 mixture).

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McCulloch MS4016PAVCC, MS4018PAVCC user manual Troubleshooting the Engine, Problem
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MS4016PAVCC, MS4018PAVCC specifications

The McCulloch MS4016PAVCC and MS4018PAVCC are two notable chainsaws designed to combine power, efficiency, and user-friendly features. Both models are well-suited for a variety of tasks, ranging from occasional home use to more demanding cutting jobs, making them ideal for homeowners and DIY enthusiasts.

The MS4016PAVCC features a 16-inch guide bar, while the MS4018PAVCC is equipped with an 18-inch guide bar. This difference in bar length accommodates different cutting requirements, with the MS4018PAVCC providing the ability to handle larger logs and thicker branches. Both models are powered by a robust 40cc engine, delivering impressive cutting performance without sacrificing weight—making them manageable for extended use.

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Safety features are a priority in the MS4016PAVCC and MS4018PAVCC models. They include a chain brake designed to prevent accidental chain rotation, reducing the risk of injuries during operation. Additionally, the design includes a front hand guard and an easy-to-operate throttle lever for enhanced safety.

Overall, the McCulloch MS4016PAVCC and MS4018PAVCC chainsaws are a blend of power, user-friendliness, and safety. With their durable build, efficient performance, and comfortable handling, they are poised to meet the needs of those looking to tackle cutting tasks around the home or yard. With McCulloch's commitment to quality and innovation, these chainsaws stand out as reliable companions for any cutting job.
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