1. Model 12 Intek Horizontal OHV
Governor Operation
Lab #4

2. Required Tools 8, 10 mm, 3/16”, 3/8” socket Ratchet wrench Extension
Inch pound torque wrench
Standard screwdriver
Pliers
Required Tools

3. Systematic Approach
Technicians need to take their time when disassembling an engine. This is not a race!
Listen for instruction when to remove the next piece. Do not work ahead!
Lay assemblies in order as they were removed.
Put fasteners with removed assemblies, or loosely back in bolt holes.

4. Let’s Begin Close fuel shut-off valve
Disconnect spark plug ignition lead from spark plug
Move throttle to stop position
Safety Issues.
Prevent accidental starting of engine.

5. Remove Air Cleaner Cover and Filter
Use flat bladed screwdriver or 8 mm socket
Inspect paper filter for tears
Foam pre-cleaner washable if equipped
Replace if necessary
Inspect tabs on filter cover for wear
1)     Remove Air Cleaner Cover And Air Cleaner Cartridge
a)     Air-Cooled Engines Work In Some Of The Harshest Conditions. Air Must Filtered To Prevent Dirt From Wearing Components And Causing Engine Failure
b)     Some Units May Have A Foam Pre-Filter. Pre-Filter Promotes Longer Life Of Paper Filter
c)      Never Use Compressed Air To Clean A Paper Cartridge. Air Could Make A Hole In The Paper. Tap Cartridge Gently On A Hard Surface To Clean. If Very Dirty, Or Soaked With Gas Or Oil, Cartridge Must Be Replaced.
d)     Pre-Filter Can Be Washed With Water And Dish Soap. Ring Out, And Squeeze In Paper Towel To Dry. Do Not Oil Pre-Cleaner.
e)     Inspect Air Cleaner Back Plate For Any Signs Of Dirt Being Ingested Into The Engine
f)        Inspect Bottom Tabs Of Air Cleaner Cover For Any Signs Of Wear. Customer May Have Assembled Cover Incorrectly. If Tabs Were Not Put In Plate, Dirt May Have Been Ingested.

6. Remove Air Cleaner Backing Plate
Use 8 mm socket
Fasteners may have Loctite® on threads
Disconnect breather tube at valve cover
Inspect gasket on rear of cover for leaks or tears
1)     Remove Air Cleaner Backing Plate
a)     Plate Serves As Support For Filters
b)     A Gasket Is Glued To The Back Of The Plate To Keep Out Dirt.
c)      Breather Tube Is Connected To Plate
i)  Breather Allows Forced Crankcase Air To Escape. Air Contains Oil And Fuel Vapors, Which Are Re-Burned
Crankcase Must Operate In A Vacuum To Prevent Oil From Being Pressurized, Which Would Burn

7. Fuel Valve Check that fuel shut-off valve is closed Safety Issues.
Prevent accidental starting of engine.

8. Disconnect Fuel Line
Use pliers to detach fuel-hose clamp at carburetor
Remove line from carb fitting
1)     Disconnect Fuel Hose from carb
Move Clamp up.
Twist line off of fitting

9. Remove Speed Control Panel
Use 8 mm socket
Fuel valve must be off
Throttle lever must be centered
1)     Remove Speed Control Panel
a)     Fuel Valve Must Be Orientated In Off Position And Speed Control At Mid-Point To Remove Panel
b)     Serves As Decoration, And Place To Attach Decals
c)      Has A Hinge On One End

10. Remove Fuel Tank & Fuel Hose
Use 10 mm socket
Use pliers to move clamp at carburetor fitting
Use caution for any spilled fuel
1)     Remove Fuel Tank And Fuel Hose. Remove Fuel Hose At Carburetor End By Using A Pliers To Move Clamp.
a)     Tank Serves As Reservoir For Fuel
b)     Cap Has Threads That Allow Air To Be Vented. Must Use Proper Cap.
c)      Tank Has Tapered Fill Area Below Neck To Allow Fuel To Run Off In Event Of Spill
d)     Tank Has Baffles Inside To Reduce Fuel From Sloshing
e)     Customers Should Leave A 1 ½” Gap Of Air Below Fuel Tank Neck To Avoid Spills
f)        Fuel Tanks And Lines Are Now Coated To Prevent Evaporative Fuel Emissions

11. Identify Governor Parts
Draw governor mechanism and label parts

12. Remove Governor Control Lever
Use 3/8" wrench
Loosen pinch bolt nut, but do not remove.
Lift control lever off of crank
1)     Perform Static Governor Adjustment
a)     Move throttle to fast speed
b)     Watch For Rotation Of Throttle Plate.
i)      Open To Close
c)      As Throttle Goes To Wide Open, Watch Movement Of Governor Lever On Governor Shaft.
i)       If Movement Of Lever Is Clockwise, Rotate Shaft Full Clockwise. If Lever Rotates Counterclockwise, Rotate Shaft Full Counter Clockwise.
(1)  Governor Shaft Will Only Rotate About A 1/8th Turn.

13. Remove Governor Springs and Link
Remove short idle spring from lever and bracket
Remove larger top-no-load spring from lever and tab
Remove link and spring from lever going to carb

14. Disconnect Ground Wire
Push on tab and pull black ignition ground wire free

15. Governor Control Panel
Use 10 mm socket
Remove the 4 black bolts.
Lift panel from engine

16. Reassembly
Technicians need to take their time when reassembling an engine. This is not a race!
Listen for instruction when to add the next piece. Do not work ahead!
Fasteners will need the proper torque values.
Special procedures will be explained.

17. Install Control Bracket
Use 10 mm socket
Install 4 black bolts attaching bracket to engine
Install bolt attaching muffler heat shield
Verify governor link and spring are properly positioned.

18. Install Link and Spring
Attach link and spring to carburetor
May need to rotate parts to make attachment

19. Install Governor Springs and Link
Install short idle spring to lever and bracket
Install larger top-no-load spring to lever and tab
Attach governor link and top-no-load spring

20. Install Governor Control Lever
Use 3/8" wrench
Install control lever on crank
Snug pinch bolt nut, but do not tighten!
1)     Perform Static Governor Adjustment
a)     Move throttle to fast speed
b)     Watch For Rotation Of Throttle Plate.
i)      Open To Close
c)      As Throttle Goes To Wide Open, Watch Movement Of Governor Lever On Governor Shaft.
i)       If Movement Of Lever Is Clockwise, Rotate Shaft Full Clockwise. If Lever Rotates Counterclockwise, Rotate Shaft Full Counter Clockwise.
(1)  Governor Shaft Will Only Rotate About A 1/8th Turn.

21. Install Ground Wire
Push on tab and insert black ignition ground wire

22. Perform Static Governor Adjustment
Move throttle to fast speed
Rotate throttle plate from idle to fast
Watch rotation of governor lever on shaft
Turn governor shaft in same direction
Use 3/8" socket
Torque to 30 in. lbs
1)     Perform Static Governor Adjustment
a)     Move throttle to fast speed
b)     Watch For Rotation Of Throttle Plate.
i)      Open To Close
c)      As Throttle Goes To Wide Open, Watch Movement Of Governor Lever On Governor Shaft.
i)       If Movement Of Lever Is Clockwise, Rotate Shaft Full Clockwise. If Lever Rotates Counterclockwise, Rotate Shaft Full Counter Clockwise.
(1)  Governor Shaft Will Only Rotate About A 1/8th Turn.

23. Install Fuel Tank and Fuel Hose
Use 10 mm socket
Torque to 60 in. lbs
Use pliers to attach fuel-hose clamp at carburetor
1)     Install Fuel Tank And Fuel Hose

24. Install Air Cleaner Back Plate
Use 8 mm socket
Torque to 40 in. lbs
Attach breather hose
1)     Install Air Cleaner Backing Plate
a)     Attach breather hose to valve cover
b)     Inspect breather hose at backing plate

25. Install Air Filter and Cover
Install air filter – pleats facing out
Install pre-filter if equipped
Install air filter cover with tabs in backing cover
Use 8 mm socket or screwdriver
Hand tighten
1)     Install Air Filter(S) And Cover
a)     Air Filter Pleats Face Out
b)     Tabs For Cover Must Be Correctly Installed In Tabs On Backing Plate

26. Success!
Do you have any extra parts?
Do you have any questions?