5hp Petrol Engine Pull Start NH150Petrol engine 5HP. This rugged little 5hp petrol engine is great for cylinder mowers such as Alroh or Scott Bonnar mowers up to lawn edgers and small plate compactors but with better performance that Honda GX120. Quality and durability are nothing without support. We carry spare parts and give an industry leading 2 year warranty on design, assembly and materials to ensure you get simply the very best support, whenever you need it. NH150 will fit a