Ignition Coil Replacement for Stihl MS661 MS661C MS 661 MS 661C Models Compatible with part numbers 1144 400 1301 11444001301 11444001301 Product overview This ignition coil is a directfit replacement designed for use with Stihl MS661 and MS661C chainsaws. It restores the spark generation function that enables reliable starting and stable engine operation. The unit is built for routine service and field repairs where restoring ignition performance is the priority. Key benefits Restores ignition and starting reliability: Replaces a failed or weak coil to help the engine produce a consistent spark for dependable starts and smoother running. Direct compatibility: Designed to match the fit and electrical connection of the listed models and part numbers for straightforward replacement. Durable construction: Compact coil assembly with a robust housing and secure terminal connections for long service life under typical chainsaw conditions. Easy to install: Simple bolton replacement that uses the original mounting points and plug connections, minimizing downtime during maintenance or . Consistent performance: Provides stable spark delivery across normal operating temperatures to support steady engine idling and acceleration. Function and specifications Function: Converts lowvoltage input from the magneto to the voltage spark required by the spark plug to ignite the fuel air mixture. Compatibility: For use with Stihl MS661 MS661C MS 661 MS 661C chainsaws. Crossreferences part numbers 1144 400 1301 11444001301 11444001301. Size and fit: Compact replacement coil sized to fit original mounting locations and connector types for the listed models. Materials and build: Rigid housing and sealed terminal area to resist vibration and contact wear common in chainsaw operation. Practical use scenarios Field after coil failure: a malfunctioning ignition coil on site to a chainsaw to service during a logging, storm cleanup, or land management task. Routine maintenance upgrade: Swap an aged or intermittently performing coil during scheduled engine servicing to improve starting consistency before peak use season. Workshop rebuild: Use as part of a small engine rebuild or troubleshooting workflow when diagnosing ignition problems that point to weak or no spark from the coil. What to expect A direct replacement component matched to the listed Stihl models and part numbers. Reduced starting issues and more reliable spark delivery when installed correctly. Straightforward installation using existing mounting hardware and electrical connectors. Compatibility reminder Intended only for the specified Stihl MS661 and MS661C models and part numbers listed above. Verify part number compatibility before installation.