DEFINITION
A Group 1 lawn mower is a machine designed to cut grass for domestic purposes. In standard form it will be self propelled and roller driven. See also “General Rules and Regulations”.

ENGINES
1.The mower must be powered by a lawn mower engine

2.The fuel for any engine must be ordinary pump fuel and be free from any performance / power increasing additives.

3.Should the entrant be in any doubt about the legality of his/her engine, they must consult a member of the race committee.

DRIVE
1.The original type of drive i.e. belts, chains, gears or whatever, must be retained. Pulleys, gears etc, may be changed for bigger or smaller ones to alter ratios. If the drive was originally through a chain case on the side of the mower, it must continue to be through the chain case on the original side.

2.It must be roller driven.

3.Mowers must be fitted with an automatic throttle closing device, which will work whenever the driver’s hand leaves the throttle control. Two independent throttle closing devices to be used. e.g. two springs.

CHASSIS and GRASS BOX
1.Grass boxes where originally fitted must be retained and securely fastened.

SAFETY
1.All mowers must have an ignition cut out. This must be hand controlled and will stop when the runner looses contact with the machine. (i.e A Dead Man’s Handle)