Lawn Mowers & Trimmers

A practical diagnostic order for a mower that has fuel at the carburetor inlet but an empty carburetor bowl, including shutoff, float, and inlet-needle checks.

A mower primer bulb that stays empty usually points to a fuel-path restriction, air leak, damaged bulb, incorrect line routing, or a problem inside the carburetor.

A practical diagnostic order for finding fuel leaks at a gas string trimmer’s tank, cap, vent, fuel lines, filter grommet, and primer bulb.

A practical diagnostic order for a riding mower or lawn tractor battery that goes dead between uses or does not recharge while mowing.

When a riding mower’s blades will not engage, a blown fuse, weak connection, PTO switch issue, safety interlock, or failed clutch circuit may be involved.

A mower deck belt that repeatedly jumps off usually points to a routing, pulley, guide, tension, or deck-alignment problem. Check these parts in order.

A blocked fuel-cap vent can resemble a carburetor problem. Learn the warning signs, safe ways to narrow it down, and when to replace the cap.

Learn the common signs of an intake air leak on a gas lawn mower, what else can cause them, and how to inspect the intake system safely.

A practical diagnostic order for a string trimmer that gets excessively hot, loses power, or stops after several minutes of cutting.

A practical diagnostic order for a gas string trimmer that idles but loses power or hesitates when you squeeze the throttle.