Stihl MS 880 Magnum Won't Rev: How to Fix It

Q: Can I remove the limiter caps myself on my Stihl MS 880?

While technically possible, removing EPA limiter caps may violate federal regulations and void your warranty. It's recommended to have authorized Stihl dealers perform this service using proper tools and procedures.

Q: Why won't my Stihl MS 880 rev past half throttle?

This is typically caused by limiter caps restricting the high-speed carburetor adjustment, preventing the engine from receiving adequate fuel at higher RPMs. A clogged air filter or spark arrestor can also cause this symptom.

Q: What is the proper fuel mixture for a Stihl MS 880?

The Stihl MS 880 requires a 50:1 fuel mixture - 50 parts gasoline to 1 part high-quality 2-stroke oil. Always use fresh fuel mixed according to Stihl specifications.

Q: How much does it cost to have limiter caps adjusted professionally?

Professional carburetor service typically costs $50-150 depending on your location and dealer rates. This includes limiter cap removal, proper adjustment, and reinstallation to EPA specifications.

Q: Can a dirty air filter cause my chainsaw not to rev?

Yes, a severely clogged air filter restricts airflow to the engine, creating an overly rich fuel mixture that prevents proper acceleration and high-RPM operation.

Abstract

When your Stihl MS 880 Magnum chainsaw won't rev properly, it's often due to limiter caps installed on the carburetor that restrict tuning adjustments. These caps prevent unauthorized carburetor adjustments and may require qualified service for proper tuning.