Do you have to have a muffler on a pleasure craft if it not over 87 decibls?

Yes, most jurisdictions require pleasure crafts to have a muffler system, regardless of their noise level, to minimize noise pollution and ensure compliance with local regulations. However, specific laws can vary by location, so it's important to check the regulations in your area. Even if a craft is below 87 decibels, having a functioning muffler is often necessary for safety and environmental reasons. Always consult local boating regulations to confirm requirements.