Overview
An intermittent ignition coil creates frustrating no-start or stalling problems that are hard to diagnose. Replacing the coil with this aftermarket unit eliminates the guesswork and restores dependable spark. It mounts in the same position as the original and uses the same connector.
Key specifications
- Type: replacement ignition coil module
- Output: matches OEM voltage specification
- Material: epoxy-sealed winding
- Includes: mounting hardware
Compatibility
Fits Stihl Leaf Fan Blower BG50 BG45 BG46 BG55 and additional models sharing the same component design. Confirm your specific model in the compatibility chart to ensure a correct match.
Installation notes
Pull the spark plug boot off the plug and unbolt the old coil from the engine. Install the new coil loosely on the mounting studs. Rotate the flywheel until the magnets align with the coil legs, insert a gap gauge between them, and let the magnets pull the coil into position. Tighten the screws, remove the gauge, and reconnect the plug wire. Verify spark before reassembling any covers.
Common questions
Q: Will this 4229 400 1300 ignition coil fit my Stihl BG55, and is it the same part used on BG45 and SH85 units?
Yes, this ignition coil is made to replace Stihl part number 4229-400-1300 and fits the BG50, BG45, BG46, BG55, BG65, BG85, SH55, and SH85. If your machine matches one of those models and uses that OEM part number, it should be the correct coil.
Q: When installing this ignition coil on a Stihl BG50, do I need to set the air gap between the coil and flywheel?
Yes, the coil-to-flywheel air gap should be set during installation for proper spark. A business card or thin gauge works well for spacing, and you should also inspect the kill wire and spark plug condition before finishing the repair.
Q: My BG85 blower has spark only when cold—could this 4229 400 1300 ignition coil be the problem?
It could be, since a failing ignition coil often works intermittently and may stop producing spark once it heats up. Before replacing it, check the spark plug, plug boot, and stop-switch wiring to rule out other common ignition issues.
