DescriptionThis video provides step-by-step instructions for replacing the intake valve rocker arm on Honda small engines, commonly found in Honda, Lawn Boy, Toro, MTD, and Cub Cadet lawn mowers and snowblowers. The most common reason for replacing the rocker arm is if it is damaged, causing the engine to not run properly.
All of the information in this rocker arm replacement video is applicable to the following brands: Honda, Lawn Boy, Toro, MTD, Cub Cadet
Tools used: 10mm socket and socket wrench, flat-blade screwdriver, 13/16” spark plug wrench, safety razor, torque wrench, 9mm wrench, Hondabond silicone sealant, feeler gauge
Step-By-Step Instructions1
Before you replace the intake valve rocker arm first make sure the engine has cooled.
2
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
3
We recommend performing this procedure with little of no fuel in the tank.
4
Now tip the engine back to a ninety degree angle.
5
Use a 10mm socket to remove the bolts securing the valve cover.
6
Pry the cover off – be prepared for some oil to spill.
7
Use a socket or a spark plug wrench to help remove the spark plug.
8
Confirm that the piston is in the “up” position and that the rocker arms are loose.
9
Now slide the pin out to remove the old rocker arm.
10
You’re now ready to install the new intake valve rocker arm.
11
Confirm that the valve moves freely then align the new rocker arm on the cylinder head mounts and slide in the pin to secure.
12
Use a feeler gauge and the adjustment screw to set the gap between the valve and the rocker arm to manufacturer’s specifications.
13
Replace the spark plug.
14
Be careful not to over tighten the plug.
15
Use a razor to scrape off the old sealer from the valve cover and the cylinder head.
16
Clean the sealing surface and apply new sealant to the valve cover.
17
Now align the cover on the cylinder head and thread the bolts loosely.
18
Tighten the bolts in an alternating pattern and torque them to manufacturer’s specifications.
19
Return the engine to a level position.
20
You’re now ready to reattach the wire and boot to the spark plug and confirm that the engine runs properly.