Ohio Garden Tractor Pullers Association
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Tractor Spec.'s Sheet
| Category | Stock | Hot Stock Singles |
Improved Twins |
Unlimited Singles |
Unlimited Twins |
Diesel |
Outlaw |
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| Kill switch |
Optional | Yes Ign/pump |
yes /ign/pump |
yes/ign/pump. | yes/ign/pump. | yes fuel/air |
yes/ign/pump | ||
| Wheelie Bars |
Recommended | yes | yes | yes | yes |
yes | yes | ||
| Brakes | Yes | yes | yes | yes | yes |
yes | yes | ||
| Reverse Gear |
Yes | opt. | yes | opt. | opt. | opt. | yes | ||
| Rear End Type |
Factory | Garden Tractor |
Garden Tractor |
Garden Tractor |
Garden Tractor |
any | any | ||
| Frames | Stock | stock | stock | stock | stock |
any | Cust./fab | ||
| Hood/Fenders | Yes | yes | yes | yes | yes |
yes | opt. | ||
| Shields |
Yes stock |
yes/clutch |
yes/clutch | yes/see safety |
yes/see safety |
yes (*) |
yes/ see safety |
||
| Wheels | Stock | alum/steel | alum/steel | alum/steel | alum/steel | alum/steel | Alum./Steel | ||
| Tire Size |
23x10.5x12 | 23x10.5x12 | 23x10.5x12 | 26x12x12 | 26x12x12 | 26x12x12 | 26x12x12 | ||
| Tire Type |
Ag/Turf | Ag/cuts ok |
Ag/cuts ok |
Ag/chevron | Ag/chevron | Ag/chevron |
Ag/Chevron | ||
| Wheel Base |
Stock |
56" rear may not be moved |
56" rear may not be moved |
56" | 56" | 72" | 72" | ||
| Hitch height |
12" max |
12"max | 12"max |
13" | 13" | 13" | 13" | ||
| Block | Stock | stock OEM |
stock OEM |
stock apear. no after market |
stock apear. no after market |
Ag or Industrial |
See Spec.s page |
||
| Bore | +.030 | +.030 |
+.030 |
any | any |
100cu. | " | ||
| Piston | Stock | any | any | any | any | any | " | ||
| Crank | Stock | stock stroke |
stock stroke |
any | any | any | " | ||
| Cam | Stock | .330 max valve lift* |
Stock* |
any | any |
any | " |
||
| Valves | Stock | 1.380 | any |
any | any | any | " | ||
| Head(s) | Stock | stock apear. |
stock ** |
billet | stock apear. |
stock apear. |
" | ||
| Head Strap |
N/A |
no | no | yes | flat head only |
yes 3/16" cable |
" | ||
| Carburetor | Stock W/AC |
1.00" stock apear. |
1.00" stock apear |
1.200"re-cast |
1.200"re-cast | N/A | " | ||
| Carb. Gasket |
Stock | any | any | any | any | N/A | N/A | ||
| Carb. Spacer |
No | 1" max. |
no | any | 3" spacer |
N/A | N/A | ||
| Fuel Pump |
Stock | mech/vac/elec. | mech/vac/elec. | any | any | any | any | ||
| Throttle | Stock | stock or dead man |
stock or dead man |
dead man |
dead man |
dead man |
dead man |
||
| Ignition | Stock | stk/chevy pts. ok |
stock | any | any | N/A | any | ||
| Exhaust | Stock or Pipe 90 degree vert. |
90 degree vert. |
90degree vert. |
90 degree vert. |
90 degree vert. |
90 degree vert. |
Vert +/- 10 |
||
| Flywheel | stock | stock or steel |
stock or steel |
steel | steel | steel | Billet ( sfi ) |
||
| Ext. Crank Weight |
No | yes | yes | yes | yes | yes | yes | ||
| Engine RPM'S |
3,600 | 4,200 | 4,200 | unlimited | unlimited | unlimited | unlimited | ||
| Fuel | pump gas |
pump or race gas |
pump or race gas |
C-12 or M-1 |
C-12 or M-1 |
Diesel |
pump/race |
Additional Tractor Spec.’s
* Cams in both the Hot Stock and Improved Twins must be cast non-adjustable OEM type part.
** Heads in the Improved Twins class must have a non-roller rocker with stock rocker ratio.
Improved Stock may use a vacuum, mechanical or electric fuel pump. Only the following models of electric fuel pumps will be allowed and you must provide positive id. For pump installed.
A. Advance Auto Parts #12-S
B. Napa Auto Parts #610-1050
C. AutoZone Auto Parts #E8012S
1. Seats, all tractors must have a tractor type seat or an aluminum seat pan with at least 3” backrest.
2. All tractors must have working brakes. Stock and Youth Stock tractors are required to have working reverse gear. Youth Stock tractors will follow (all stock) tractor spec.'s
3. Exhaust, stock tractors may use muffler or straight pipes. All other classes must have 90 degrees vertical straight pipe(s) with the exception of the outlaws, which can be 10 degrees off of vertical 90 degrees.
4. Maximum tire sizes,
a. Stock- 23x10.50x12 turf or ag.
b. Improved Stock Twins - 23x10.50x12 ag or turf, tires may be cut. No chevron cuts or molded cut tires.
c. All unlimited rpm classes 26x12x12 chevron cuts or ag/Cuts.
d. Hot Singles 23x10.5x12 ag. or turf style tire that may be cut. No chevron or molded cut tires.
5. Drawbar will be horizontal and stationary in all directions. Hitching device must be not more than ¾ “ in thickness and 1 ½ “ hole to hook thru. Pulling point may not be more than ¾ “ from the back edge of hitching device, parallel to and not more than the set hitch height for any given class. Hitch is to be constructed of steel or billet aluminum. No casting type hitches.
6. *Hitch height.
a. Stock- stock height not to exceed 12" (this includes youth stock)
b. Hot Stock Singles - 12”
c. Improved Stock Twin 12"
d. Unlimited Singles, Unlimited Twins, Diesel 100 cu., Outlaw - (All 13”)
7. No portion of a tractor shall exceed 4ft. in width. No tractor shall exceed 8ft. forward of the center of thear axle including weights. Stock altered and Improved Stock and Hot Stock tractors shall not exceed 7ft. forward of the center of the rear axle. Stock tractors shall remain stock length.
8. Rear weight bar and weights may not extend rearward further than 18” from the center of the rear axle.
9. To avoid damage all weights, bars and brackets must clear the ramps on and off scale.
10. Diesel Tractors shall have only agricultural or industrial type engine.
11. Stock Tractors are allowed weight brackets and adjustable hitches.
Outlaw Tractors
Limited Outlaw 1350lbs. 4-cylinder automotive 2.5-liter max. Factory head intake and block. Single downdraft 2barrel carburetor no larger than 500 cfm. 26x12x12 maximum tire size. 72”maximum wheelbase. Hitch height 13”. The hitch may be no further than 18” from the center of the rear axle to he point of hitch that contacts the hook of the sled chain. All other safety requirements that apply to the garden tractor classes shall apply to outlaw tractors.
Outlaw 1200lbs. Non-automotive 1200cc maximum, naturally aspirated. 72” maximum wheelbase, 13” hitch height, hitch must be no further than 18” from center of rear axle to point of the hitch that contacts the hook of the sled chain. 26x12x12 maximum tire size. All other safety equipment requirements that apply to the garden tractor classes shall apply to outlaw tractors.
Super Outlaw 1500lbs. 4- cylinder automotive engines, any type of fuel induction. Any type of engine modifications, superchargers and turbo are permitted. 13” hitch, hitch must be no further than 18” from the center of the rear axle to the point of the hitch that contacts the hook of the sled chain. 26x12x12 maximum tire size. All other safety equipment requirements that apply to the garden tractor classes shall apply to the outlaw tractors.
Hooks to Date
