Jamshedji Construction Machinery Co. Offers Ride-on type Trowel with Electric Starter. Jamshedji Construction Machinery Co. Is an ISO 9001: 2008 accredited company supplying a wide range of construction machines like pumps, mixers, cutters, rollers, rammers and vibrators. The Ride-on type Trowel with Electric Starter operates on engine of Honed 24 HP/B & S vanguard 22 HP and works n a blade speed of 140 RPM. The Ride-on type Trowel with Electric Starter provides a working width of 1880mm and 1770mm.