V. General Mower Requirements Continue....

	Mowers must be neat and clean, with paint in new or very good condition. No excess dirt, oil, grease, rust or primer. Sponsor graphics must not interfere with mower's racing numbers or class letters.
	All mowers that do not have the top of the engine completely covered by the hood must have the flywheel covered by either the recoil housing, the stock wire housing or racer made over.
	Race numbers should be a minimum of 5" high and of a sharply contrasting color from their background, and should be visible from all four sides of the mower.
	All positively charged terminals must be insulated with a cover or heavy tape, and battery must be well secured.
	No offset or stagger. Body must be mounted in the center of the wheels. Tires must match in size per axle. Lawn mower seats only, in the stock location, no lower than the tops of the fenders or exposed rear tires and on centerline. Offset measured from centerline to the outside of tire sidewall. Wheelbase may not be altered.
	Glass headlights must be taped or removed.
	Maximum width 38" sidewall to sidewall unless otherwise stated in the class build section.
	Steering wheels and handlebars may be replaced with an commercially available pieces, but not substituted for each other. May not be mounted off center unless originally mounted offset. Handlebar type grips may not be added to steering wheels.
	Tires must be lawn tractor tires. No Snow Hog, tiller, A.T.V., commercial mower or performance compound or competition kart tires.
	No centrifugal and/or torque converter clutches.
	Minimum 4" ground clearance to frame, 2 1/2" ground to deck unless otherwise stated in class build section. Fuel Lines must be clamped at all joints.
	All mowers must utilize a clutch.
	Flywheels
	Unmodified Stock
	100% Billet
	Modified Stock along with an approved scatter shield (guidelines below).
	All Scatter shields used on racing lawnmowers must adhere to the following specifications:
	Scatter shields must be fabricated from 1/8" steel minimum
	The scatter shields must be form fitting and follow all the contours of the blower housing.
	The scatter shield must be the same height (vertical shaft) or same width (horizontal shaft) as the blower housing and be bolted to the block using the original mounting points.
	A 1" X 1/8" minimum steel strap must run across the face of the blower housing to reinforce the scatter shield, side to side.
	Notches for starter drives must be reinforced to at least one inch past each end of the notch.
	Any holes drilled into shield for items such as dip stick holder or fuel pump must be 1/2" or less.
	The scatter shield must be painted to match the engine's blower housing.

VI. Fuel and Fuel Delivery

The only acceptable fuel is pump gasoline.

Any apparatus other than the carburetor or fuel injector, which can be used to introduce any gaseous or liquid substance into the induction flow, whether connected or not, is prohibited, and will result in disqualification. Such devices include, but are not limited to, Nitrous Oxide, alcohol or water injection systems. Any attempt to conceal or disguise such apparatus will be considered a flagrant violation and may result in expulsion from the race.

VII. Racing Classifications

	Modifications not listed are not approved.
	INTENT: To provide a safe opportunity to demonstrate the driver's ability when in competition with essentially identical mowers. This is a highly regulated class to insure uniformity between machines.

Warning*

	Remove mower blades before modifying or removing the engine governor. Governor alternations will allow the engine to over speed, which may cause blade or blade assembly to explode, presenting grave danger to participants, spectators and officials around the mower, and may lead to damage of the engine and/or engine components.
	PREPARED: Class designation: 12-16 H.P. Single / 16-20 H.P. Single and/or Twin. These mowers are as delivered from the factory except for the modifications listed below.
	Engine must be originally manufactured for use in lawn mowing equipment and be stock in appearance, with the exception of air filter, air cleaner or velocity stack.
	Crankshaft must be in original orientation and clearance hole in the frame. Engine may be internally modified.
	Exhaust design is open, but must terminate away from driver and competitors, in a rearward and/or downward direction and present no apparent safety hazard.
	Starter must be onboard, either electric or pull-rope.
	Driveline may be modified from the engine pulley to the rear wheels, but must utilize a shiftable lawnmower transmission or transaxle.
	Rear axle may use open differential, locked "live" or solid axle. No single wheel drive.
	No centrifugal and or torque converter clutches.
	Rear axle should use shaft locks, center bolts, or thur-bolts to secure the rear wheels.
	All steering linkages must use ball-type or spherical threaded rod ends.
	Front axle may be pinned, bolted or welded into stock position. No suspension, no shock absorbers. Axles must have a 1-piece beam.
	Front axle and steering may be reinforced, substituted or fabricated. In the case o racer-fabricated axles, these will be subject to the judgement of the Technical Inspector as to their apparent safety for racing. Aluminum may not be used as the material for the one-piece axle.
	Shaft locks, center-drilled axle with locking bolds, castellated nuts with cotter pins, are acceptable for securing front wheels. Cotter pins, E-rings and C-rings alone, bent nails, hitch pins, over-center pins and quick-release pins are not sufficient for wheel retention and are not approved.
	Wheels must be the same size on each axle, of any origin, made of metal. No dual or tandem wheels.
	Deck: The deck must be at least as wide as either running boards or body edge whichever is wider. Decks may be extend any more than 2" beyond the tire sidewalls on each side. Deck halves may be mounted to running boards. Decks must be secure. SAE lawnmower tires must be used.
	Footholds must be discrete, and not more than 2" high, made of flat or "L" stock (no rod stock), and made such that the foot cannot become entangled in a rollover.
	Class is determined by the OEM factory rating of the lawn mower engine.
	All parts should be of lawn mower origin with the exception of those specifically mentioned above or otherwise allowed under Sec. VII
	Hoods and body parts such as fenders may be upgraded from year to year only if the parts are from the mother company and any subsidiary company of said mother company.
	External ignition Systems are allowed.
	Aluminum Flywheels are allowed.
	Fenders may be discreetly moved but not altered.
	Must use axle mounted brakes, lawnmower brake will work if you can prove it will stop.
	CLASS DEFINDED: (based on OEM BLOCK designation) 12-16 H.P. Single and 16-20 H.P. Single and Twin
	Crankshaft must in original orientation. Engine plate may be welded to frame rails in as close to the original location as possible.
	INTENT: To allow competitors the opportunity to compete in a faster class of racing. Mowers must maintain a recognizable form of a lawn mower.

V. General Mower Requirements Continue....

Mowers must be neat and clean, with paint in new or very good condition. No excess dirt, oil, grease, rust or primer. Sponsor graphics must not interfere with mower's racing numbers or class letters.

All mowers that do not have the top of the engine completely covered by the hood must have the flywheel covered by either the recoil housing, the stock wire housing or racer made over.

Race numbers should be a minimum of 5" high and of a sharply contrasting color from their background, and should be visible from all four sides of the mower.

All positively charged terminals must be insulated with a cover or heavy tape, and battery must be well secured.

Glass headlights must be taped or removed.

Maximum width 38" sidewall to sidewall unless otherwise stated in the class build section.

Steering wheels and handlebars may be replaced with an commercially available pieces, but not substituted for each other. May not be mounted off center unless originally mounted offset. Handlebar type grips may not be added to steering wheels.

Tires must be lawn tractor tires. No Snow Hog, tiller, A.T.V., commercial mower or performance compound or competition kart tires.

No centrifugal and/or torque converter clutches.

Minimum 4" ground clearance to frame, 2 1/2" ground to deck unless otherwise stated in class build section. Fuel Lines must be clamped at all joints.

All mowers must utilize a clutch.

Flywheels

Unmodified Stock

100% Billet

Modified Stock along with an approved scatter shield (guidelines below).

All Scatter shields used on racing lawnmowers must adhere to the following specifications:

Scatter shields must be fabricated from 1/8" steel minimum

The scatter shields must be form fitting and follow all the contours of the blower housing.

The scatter shield must be the same height (vertical shaft) or same width (horizontal shaft) as the blower housing and be bolted to the block using the original mounting points.

A 1" X 1/8" minimum steel strap must run across the face of the blower housing to reinforce the scatter shield, side to side.

Notches for starter drives must be reinforced to at least one inch past each end of the notch.

Any holes drilled into shield for items such as dip stick holder or fuel pump must be 1/2" or less.

The scatter shield must be painted to match the engine's blower housing.

VI. Fuel and Fuel Delivery

The only acceptable fuel is pump gasoline.

VII. Racing Classifications

Modifications not listed are not approved.

INTENT: To provide a safe opportunity to demonstrate the driver's ability when in competition with essentially identical mowers. This is a highly regulated class to insure uniformity between machines.

******************Warning*******************

PREPARED: Class designation: 12-16 H.P. Single / 16-20 H.P. Single and/or Twin. These mowers are as delivered from the factory except for the modifications listed below.

Engine must be originally manufactured for use in lawn mowing equipment and be stock in appearance, with the exception of air filter, air cleaner or velocity stack.

Crankshaft must be in original orientation and clearance hole in the frame. Engine may be internally modified.

Exhaust design is open, but must terminate away from driver and competitors, in a rearward and/or downward direction and present no apparent safety hazard.

Starter must be onboard, either electric or pull-rope.

Driveline may be modified from the engine pulley to the rear wheels, but must utilize a shiftable lawnmower transmission or transaxle.

Rear axle may use open differential, locked "live" or solid axle. No single wheel drive.

No centrifugal and or torque converter clutches.

Rear axle should use shaft locks, center bolts, or thur-bolts to secure the rear wheels.

All steering linkages must use ball-type or spherical threaded rod ends.

Front axle may be pinned, bolted or welded into stock position. No suspension, no shock absorbers. Axles must have a 1-piece beam.

Front axle and steering may be reinforced, substituted or fabricated. In the case o racer-fabricated axles, these will be subject to the judgement of the Technical Inspector as to their apparent safety for racing. Aluminum may not be used as the material for the one-piece axle.

Shaft locks, center-drilled axle with locking bolds, castellated nuts with cotter pins, are acceptable for securing front wheels. Cotter pins, E-rings and C-rings alone, bent nails, hitch pins, over-center pins and quick-release pins are not sufficient for wheel retention and are not approved.

Wheels must be the same size on each axle, of any origin, made of metal. No dual or tandem wheels.

Deck: The deck must be at least as wide as either running boards or body edge whichever is wider. Decks may be extend any more than 2" beyond the tire sidewalls on each side. Deck halves may be mounted to running boards. Decks must be secure. SAE lawnmower tires must be used.

Footholds must be discrete, and not more than 2" high, made of flat or "L" stock (no rod stock), and made such that the foot cannot become entangled in a rollover.

Class is determined by the OEM factory rating of the lawn mower engine.

All parts should be of lawn mower origin with the exception of those specifically mentioned above or otherwise allowed under Sec. VII

Hoods and body parts such as fenders may be upgraded from year to year only if the parts are from the mother company and any subsidiary company of said mother company.

External ignition Systems are allowed.

Aluminum Flywheels are allowed.

Fenders may be discreetly moved but not altered.

Must use axle mounted brakes, lawnmower brake will work if you can prove it will stop.

CLASS DEFINDED: (based on OEM BLOCK designation) 12-16 H.P. Single and 16-20 H.P. Single and Twin

Crankshaft must in original orientation. Engine plate may be welded to frame rails in as close to the original location as possible.

INTENT: To allow competitors the opportunity to compete in a faster class of racing. Mowers must maintain a recognizable form of a lawn mower.

Warning*

CLASS DEFINDED: (based on OEM BLOCK designation)
12-16 H.P. Single and 16-20 H.P. Single and Twin

INTENT:
To allow competitors the opportunity to compete in a faster class of racing. Mowers must maintain a recognizable form of a lawn mower.