2010 Monaco Diplomat Motorcoach

Year: 2010 | Make: Monaco | Model: Diplomat | VIN: 51Z435612A1049876 | Mileage: 53,000 Miles | Type: Class A Motorcoach | Length: 42 ft | Engine: Cummins ISL 8.9L Turbodiesel Inline-Six | Transmission: Allison 6-Speed Automatic | Drive Type: Rear-Wheel Drive (RWD)

This 2010 Monaco Diplomat is a luxurious 42-foot Class A motorcoach powered by a Cummins ISL 8.9-liter turbodiesel inline-six producing 425 HP and 1,200 lb-ft of torque, paired with an Allison 6-speed automatic transmission. The Roadmaster chassis features a dually drive axle with tag axle, air-adjustable suspension, air brakes with ABS, engine brake, automatic traction control, and LCI electronic auto-leveling. The exterior is finished in black and gray with blue and silver accents and features a one-piece fiberglass roof, quad slide-outs, automatic patio awning, slide-out toppers, 22.5-inch aluminum wheels, Hadley air horns, and Zone Defense rear and side-view cameras.

The spacious interior features beige leather Flexsteel captain’s chairs, tile flooring, recessed lighting, central air conditioning and heating, and an 84-inch ceiling height. The kitchen includes Corian countertops, sink, Sharp Carousel microwave, Suburban 3-burner propane cooktop, residential refrigerator/freezer, and a two-person dinette. The lounge area includes a sofa, Vizio flat-screen TV, and Samsung digital home theater system, while the bathroom provides a shower, toilet, wardrobe, and vanity with sink. Separate Whirlpool washer and dryer units add residential convenience.

The rear bedroom features a king-sized bed, Sharp LCD TV, bedside shelves, and wardrobe storage. Additional equipment includes a 10-gallon water heater, 100-gallon freshwater tank, 62-gallon gray water tank, 40-gallon black water tank, 39-gallon propane tank, 2,000-watt inverter, 50-amp electrical service, and a 10kW Cummins Onan diesel generator. The coach has approximately 53,000 miles, with about 10,000 added under current ownership, and the oil and air filters were changed in January 2026.