The 36z will most likely be the quietest running boat among MJM designs. That’s saying something, because all MJM models have low noise levels thanks to extra Soundown insulation and the strength of their epoxy construction. What makes the 36z different is the new generation of smoother-running, low emission Volvo Penta turbocharged 4-stroke diesels mounted in the stern. These are marinized versions of the diesel engines used in their luxury XC-70 wagon in Europe, and are just being introduced in the U.S. market.