Honda’s GX Commercial engine is legendary for superior reliability and performance. And there’s no doubt about it: the GX series engine lives up to the legend. Lower noise levels, lower vibration, and lower emissions – without sacrificing power output or performance. WP1540AW/ WP1540A/ WP1540/ WP1550AW/ WP1550A/ WP1550RW/ WP1550R/ WP1550VW/ WP1550V/ WP1550W/ WP1550.