This blog is a step-by-step instruction for replacing the primer bulb on a Toro leaf blower. The most common reason for replacing the primer bulb are when the primer bulb is leaking or the engine won’t start.

Replacement

Before you begin the replacement, you need to make sure the engine and muffler have cooled and the on/off switch is in the off position. You also need to remove the wire and boot from the spark plug to prevent the engine from accidentally starting.

Step 1: Now rotate the air filter cover mounting screw counterclockwise to release the cover.
Step 2: Pull off the air filter and use a t25 Torx bit screwdriver to remove the screw to release the throttle cable retaining bracket. Disconnect the throttle cable from the carburetor.
Step 3: Next, unthread the bolts securing the filter housing and carburetor.
Step 4: Use pliers to detach the gas tank fuel lines from the primer bulb and the carburetor. Be prepared for some fuel to spill. Pull the filter housing and carburetor away from the engine. Release the retaining clamp and pull the primer bulb fuel line off of the carburetor. Depress the tabs to detach the old primer bulb from the housing.
Step 5: Prepare the new primer bulb for installation by transferring the fuel line from the old primer bulb to the new one.
Step 6: Now insert the line through the hole in the housing and snap the new bulb into place. Reattach the primer bulb fuel line to the carburetor as well as the gas tank fuel lines to the new primer bulb and the carburetor. Make sure the intake manifold gasket is in place on the carburetor mounting bolts, then reposition the carburetor and filter housing on the engine. Thread and tighten the bolts.
Step 7: Reconnect the throttle cable, replace the retaining bracket and secure it with the screw. Replace the air filter by positioning it around the tabs on the filter housing. Realign the cover and rotate the mounting screw clockwise to secure.

With the repair completed, reattach the wire and boot to the spark plug and your leaf blower should be ready for use.

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