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Joshua GarciaJul 26, 2025
Why does my Yamaha AR240 HO engine run irregularly or stall?
- RRebecca BrownJul 26, 2025
An irregular running or stalling Yamaha Boat engine can stem from several causes. It could be due to: an empty fuel tank (refill as soon as possible), stale or contaminated fuel, water or dust collected in the fuel filter (in both cases, have it serviced at a Yamaha dealer), a fouled or defective spark plug, an incorrect spark plug heat range (in both cases, replace the spark plug), an incorrect spark plug gap (adjust the gap), a loose spark plug cap (fit it properly), loose electrical connections (tighten or connect them properly), or a cracked, torn, or damaged spark plug cap (replace the cap).