Yamaha AR240 HO User Manual (English)

Questions and Answers:

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Joshua GarciaJul 26, 2025
Why does my Yamaha AR240 HO engine run irregularly or stall?
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  Rebecca 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).
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Stephanie PalmerAug 3, 2025
What to do if my Yamaha Boat speed is too slow or loses power?
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  Jeremy CooleyAug 3, 2025
  If your Yamaha Boat is experiencing slow speeds or losing power, several factors could be responsible. Check for the following: cavitation or a clogged jet intake (clean it), engine overheat due to a clogged jet intake or cooling system (clean these components), a clogged fuel filter, or stale or contaminated fuel (in both cases, have it serviced at a Yamaha dealer). Also, inspect the spark plugs for fouling, defects, incorrect heat range (replace if necessary), or incorrect gap (adjust if needed). Finally, ensure the spark plug caps are properly fitted.
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William RuizAug 11, 2025
What to do if the spark plug cap is loose on Yamaha Boat?
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  Jeremy WatsonAug 11, 2025
  If the spark plug cap is loose on your Yamaha Boat, causing the engine to run irregularly or stall, fit it properly.
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Cynthia EspinozaAug 17, 2025
What to do if spark plug cap is cracked on Yamaha AR240 HO?
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  Michael NorrisAug 18, 2025
  If the spark plug cap is cracked, torn or damaged on your Yamaha Boat, which causes the engine to run irregularly or stall, replace it.