Lamoille County Field Days

Lawn Tractor Pull

LAWN TRACTOR PULLS ARE BACK FRIDAY JULY 28, 2017

General

  1. Decisions of the officials are final.
  2. Unsportsmanlike conduct will not be tolerated – any participant displaying such conduct will be asked to leave immediately and me be permanently banned from pulling.
  3. By registering to pull, you agree to allow officials to inspect your machine for rules violations – may include teardown of any part of machine. Refusal to comply will result in immediate disqualification.
  4. Officials reserve the right to refuse to hook any machine for whatever reason. **Remember that pulling is a privilege, not a right.**
  5. All classes are gasoline fueled, unless otherwise stated.

Shed Stock

Any production lawn mower as manufactured that is unaltered in any way, shape, or form- other than weight brackets, wheelie bars, and hitch reinforcements.

  1. Must be vertical shaft engine.
  2. Must be originally an 8″ rim tractor.
  3. May remove deck.
  4. Must have all mufflers, air filters as intended by manufacturer.
  5. Max RPM – governor controlled 3600.
  6. Must have functional brakes.
  7. If hitch reinforcement is needed – must be done below the plate as not to increase the hitch height.
  8. A clevis will be available a each pull to allow for the large hook to attach to the small hole.
  9. A set of quick-mount wheelie bars will be provided as needed to allow new pullers without wheelie bars to safely compete until the puller can construct their own.
  10. Wheelie bars must stick out 5″ minimum beyond rear most part of rear tires. 10″ minimum between bars, 12″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  11. Weight of class to be determined, most likely will be 550-650 pounds. May be slightly higher if larger adults are pulling big twin tractors. We will increase weight only enough to allow the heaviest combination of driver and tractor to compete after removing as much weight as possible from his/her tractor. The intent of this class is to be able to use a commonly available and inexpensive tractor that may still mow the lawn to come and compete, have fun and reduce the chance of breakage from excess traction caused by excess weight and high hitch points.
  12. Any tractors not meeting all of the rules in this class are welcome to pull in the stock class, provided they meet the rules.

Stock

  1. 18 HP and under, air-cooled lawn mower type engines only – engines must be stock.
  2. 3800 RPM max, measured with our tachometer.
  3. Stock air cleaner, no velocity stacks or similar devices, may run K&N air filter element or similar.
  4. Open exhaust allowed, ignition timing may be changed.
  5. No locked rear ends – must have open differential (if tractor has a selectable locking device, it may not be used)
  6. Must be stock wheel base, stock front axle, no dropped spindles or other lowering devices.
  7. ​Must run stock brand trans-axle – lawn/garden trans-axles only.
  8. Re-gearing is allowed (either by transmission gears or belt pulleys)
  9. Turf tires only – no altering of tread allowed, 23x10.5x12 maximum tire size.
  10. Must have hood, seat, and grill.
  11. 12″ hitch height maximum – measured with our gauge. Hitch must be rigid in all directions (adjustable hitches allowed, must remain at set height)
  12. Front weights may extend 18″ maximum ahead of center-line of front axle.
  13. Must have functioning brake system.
  14. Wheelie bars must stick out 5″ minimum beyond rear most part of rear tires. 10″ minimum between bars, 12″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  15. Front wheels must be no smaller than 6″ in diameter with a stock lawn and garden type tire.

Max Stock

1050 lb. NO TOLERANCE

  1. Must be stock block Kohler, Briggs, or Tecumseh single cylinder, flat-head engines. 31 cubic inches and under with nine bolt heads. Max 4000 RPM. Foot or hand throttle permitted.
  2. Fuel may be street-pump gasoline, VP C-12, or Av gas 100LL. No alcohol or oxygenated fuels.
  3. The engine must look stock on the outside. Must have stock stroke for engine, valves must be stock size and in stock location. Porting allowed, no material may be added to ports. Reground cast cams allowed, .330 lift with lash max. Billet rods and aftermarket pistons. Aftermarket points and electronic ignition allowed.
  4. The head must be OEM. Head straps are allowed.
  5. OEM cast flywheel with no cutting, welding, or adding weight. Stock weight steel flywheels are acceptable.
  6. Carburetor must be stock carb for engine, or a Kohler or Walbro. Carb spacers, velocity stacks, and bottom adjusts are acceptable. No high performance fuel pumps. 1″ spacer max, no air may enter after venturi. 1″ max venturi size.
  7. Exhaust pipes, with no muffler, must discharge vertically. 12″ minimum from center of bend.
  8. 26x12x12″ max rear tire size, with a maximum rollout of 78″. Cutting permitted. No professional pulling tires allowed, including, but not limited to, tires by Dick, Cepek, Lawn Tec, Pit Bull, and VM series of tires. Aftermarket wheels and 3 rib tires permitted.
  9. 13″ hitch height. The hitch must have a 1.5″ diameter hole for sled hook and be 1/2″ thick at point of hook.
  10. Must use stock garden tractor frame and transaxle, but may be modified for engine installation. No portion of tractor may exceed 7 feet forward of the center of the rear wheel, including weights. 52″ wheelbase maximum. Hood, seat, and grill required, may be from another brand.
  11. Engine tech items will be RPM with no tolerance, stock stroke, exterior appearance, and no alcohol. If engine is other than K-Kohler you must supply tech person with a stock head gasket for your engine.
  12. Custom front axles allowed.
  13. Wheelie bars must stick out 5″ minimum beyond rearmost part of rear tires. 10″ minimum between bars. 12″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  14. Note: No mods other than those listed above. If in question, ASK. 

**Allowed modifications are listed;if something is not listed, it may be assumed it is NOT allowed.**

8″ Super Stock

  1. 18 HP air-cooled lawn mower type engines only – 35CI OHV, 43CI L-head.
  2. 1 barrel carbs only, must be stock carb for engine being used, no fuel injection.
  3. Allowed engine modifications – engines must be stock except for the following:
    1. ​​Governor override or removal
    2. Open exhaust, custom header allowed
    3. May change ignition timing
    4. Velocity stacks allowed, no added carb spacers allowed, no alterations to stock spacers allowed
    5. May drill carb jets or install adjustable main jet kits, no modifications allowed to carb to increase air flow, no air may enter intake system after venturi
    6. Heads may be shaved; however no alterations may be made to any pieces to correct port misalignment
    7. Material may be removed on outside of intake if necessary to clear heads
  4. Stock wheelbase, custom front axles allowed as long as stock wheelbase is maintained.
  5. Belt drive, belt clutch only – no Cub Cadet 3-speed trans-axles allowed.
  6. Must be lawn/garden tractor transaxle, may be from another brand, re-gearing allowed, locked differentials allowed.
  7. Must have hood, seat, and grill.
  8. Must run stock chassis; however chassis may be altered to fit non-stock engines as long as stock wheelbase is maintained.
  9. 12″ hitch height maximum – measured with our gauge. Hitch must be rigid in all directions (adjustable hitches allowed, must remain at set height)
  10. Wheelie bars must stick out 5″ minimum beyond rear most part of rear tires. 10″ minimum between bars, 12″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  11. 18x9.5x8 maximum tire size, turf tires only, may be cut to enhance traction.
  12. Must have functioning brake system.
  13. No weights or brackets may extend more than 18″ ahead of centerline of front axle.
  14. Engines may be converted from horizontal to vertical as long as they were available in both configurations.

12″ Super Stock

  1. 18 HP air-cooled lawn mower type engines only – 38CI OHV, 48CI L-head.
  2. 1 barrel carbs only, must be stock carb for engine being used, no fuel injection.
  3. Engine must be stock except for the following:​
    1. ​Governor override or removal allowed; however any throttle stops must remain in place, throttle may be open no more than stock
    2. Open exhaust, custom header allowed
    3. May change ignition timing
    4. Velocity stacks allowed, no added carb spacers allowed, no alterations to stock spacers allowed
    5. May drill carb jets or install adjustable main jet kits, no modifications allowed to carb to increase air flow, no air may enter intake system after venturi
    6. Heads may be shaved; however no modifications are allowed to correct port misalignment, intakes may be ground on the outside to allow head to fit
  4. Stock chassis; stock wheelbase; custom front axles allowed as long as stock wheelbase is maintained; however chassis may be altered to fit non-stock engines as long as stock wheelbase is maintained.
  5. Must have hood, seat, and grill.
  6. Lawn/garden type trans-axles only, may be from different brand, re-gearing allowed, locked differentials allowed.
  7. 12″ hitch height maximum – measured with our gauge. Hitch must be rigid in all directions (adjustable hitches allowed, must remain at set height)
  8. Wheelie bars must stick out 5″ minimum beyond rear most part of rear tires. 10″ minimum between bars, 12″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  9. 24x12x12 maximum tire size, turf tires only, tires may be cut to enhance traction.
  10. Must have functioning brake system.
  11. No weights or brackets may extend more than 18″ ahead of centerline of front axle.
  12. Engines may be converted from horizontal to vertical as long as they were available in both configurations.

Open

  1. 25HP air-cooled lawn mower type engines only- 44CI OHV, 60CI L-head maximum. May run multiple engines as long as HP and CI limits are not exceeded.
  2. 1 barrel carbs only, must be stock carb for engine being used, no fuel injection.
  3. Engine must be stock except for the following:​​
    1. ​Governor override or removal allowed
    2. Custom exhaust allowed
    3. May change ignition timing
    4. Velocity stacks allowed, no added carb spacers allowed, no alterations to stock spacers allowed
    5. May drill carb jets or install adjustable main jet kits, no modifications allowed to carb to increase air flow, no air may enter intake system after venturi
    6. Heads may be shaved; however no modifications are allowed to correct port misalignment, intakes may be ground on the outside to all head to fit
  4. 67″ wheelbase maximum, custom chassis allowed
  5. Wheelie bars must stick out 5″ minimum beyond rear most part of rear tires. 10″ minimum between bars, 20″ maximum wheelie height measured from ground to bottom of front tire. Wheelie bars must be able to support weight of tractor at maximum weight class.
  6. 12″ hitch height maximum – measured with our gauge. Hitch must be rigid in all directions (adjustable hitches allowed, must remain at set height)
  7. Must have a functioning brake system
  8. Must have seat
  9. 26x12x12 maximum tire size, may use bar tread tires, tires may be cut to enhance traction. **NO PRO PULLER TIRES ALLOWED** (Lawntecs, Cepeks, Vogels, etc.)
  10. No weights or brackets may extend more than 18″ ahead of centerline of front axle.

 

 

map