Ohio Garden Tractor Pullers Association
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Tractor Spec.'s



Tractor Spec.'s









Category
Stock  Mod./Stock Stock Altered
Pro Single
Pro Twin
 Pro Diesel
 Outlaw
      NQS Rules
NQS Rules
NQS Rules
   

Kill Switch

optional
Yes/ign./pump
Yes/ign./pump
Yes/ign./pump
Yes/ign./pump
Yes(*)
See additional tractor spec.'s
Wheelie Bars
recommended
yes
yes
yes
yes
 yes  
Working Brakes
yes
 yes yes 
yes 
yes 
 yes  
Reverse gear required
yes 
yes 
No
No 
No 
 No  
 Rear end type
Factory
Garden Tractor
Garden Tractor 
Garden Tractor 
Garden Tractor 
Any type
 
 Frames Stock
Stock 
Stock 
Any
Any
 Stock or fab.
 
 Hood and fenders
yes
yes 
yes 
yes 
yes 
yes 
 
 Shields Yes/Stock
Yes/Clutch
Yes/NQS
Yes/NQS
Yes/NQS
Yes(*)
 
 Wheels Stock
Aluminum/Steel
Aluminum/Steel 
Aluminum/Steel 
Aluminum/Steel 
Aluminum/Steel 
 
Tire size Max.
23x10.50x12
23x10.50x12 
26x12x12
26x12x12 
26x12x12 
26x12x12 
 
Tire type
agr./turf
agr. no cuts
agr./chevrons
agr./chevrons
agr./chevrons 
agr./chevrons 
 
wheel base
Stock
56" may not move rear end
52"
56"
56"
 72"  
 Hitch height
Stock*
12"
13"
13" 
13" 
13" 
 
 Block Stock
Stock OEM
Stock appearing
Stock appearing 
Stock OEM
Agricultural or industrial
 
Bore
+.030
+.030
3.780/ 36.5 cu.
50.5 cu.
 48 cu.
100 cu.
 
Piston
Stock/Flush
Stock OEM
Any
Any 
Any 
Any 
 
 Crank Stock
Stock OEM
3.25 stroke
Any
Any  Any
 
Cam
Stock
Stock OEM
.330 lift max.
Any
Any
Any
 
Valves
Stock
Stock
1.380
Any
Any
Any
 
Head (s)
Stock
Stock appearing
Billet or cast
Billet
Stock appearing
Stock appearing
 
Head strap
N/A
No
Recommended
Recommended 
 Recommended on flat head twins
Yes 3/16" Steel cable(*)
 
Carburetor
Stock
stock appearing
1.00" re-cast
1.200" re-cast
1.200" re-cast
N/A
 
Carb.gasket
Stock
Stock
Any
Any
 Any N/A
 
Carb.spacer
No
No
1" max.
Ram Tube OK
3" max.
N/A
 
fuel Pump
No
Mech. -Vac. - Elec.(*)
 Any Any
Any
Any
 
 Throttle Stock
Stock or
Dead man
Dead man
Dead man 
Dead man 
Dead man 
 
Ignition
Stock
Stock appearing
Any
Any 
Any 
N/A
 
 Exhaust Muffler or straight pipe
90 degrees Vert.
within 10 degrees of vert.
 within 10 degrees of vert. within 10 degrees of vert. 
90 degrees Vert.
 
 Flywheel Stock
Stock or Steel
Steel
Steel 
Steel 
Steel 
 
External crank weight
No
Yes
Yes 
Yes 
Yes 
Yes 
 
Engine RPM's
3,600
4,000
Unlimited
Unlimited 
Unlimited 
Unlimited 
 
 Fuel Pump gas
pump or race
C-12
C-12 
 C-12 Diesel
 
               
               

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