Backfiring in a MerCruiser 43 V6 engine can be caused by several issues, including improper timing, a faulty carburetor, or air-fuel mixture problems. Additionally, ignition system problems such as worn spark plugs or faulty ignition coils can contribute to backfiring. It is crucial to perform a thorough inspection of the ignition system, fuel delivery, and timing adjustments to identify the exact cause. A detailed diagnosis by a professional technician may be needed for proper resolution.
Asked Jun 28, 2025 3:44 PM