Husqvarna 525 Series Trimmer Tune-Up Kit

A Husqvarna 525 tune-up kit bundles the routine wear parts for 525-series trimmers and brushcutters so you can service the machine in one sitting. It is the quickest fix for hard starting, bogging, and poor idle on a trimmer that has gone a season without attention.

Why a tune-up fixes most trimmer problems

A 525-series trimmer that won't start or dies under load usually has nothing wrong with it beyond dirty filters and a tired plug. Dust from brush clearing loads the air filter, old fuel varnishes the fuel filter, and a worn plug makes cold starts a chore. Swapping those parts brings most machines back.

Check the kit contents against your model and serial number before you start, since the 525 family covers several trimmers and brushcutters. Find more service items in our power equipment parts.

A tune-up kit also saves the hunt for individual part numbers. Ordering everything in one go means the trimmer is down for one evening instead of waiting on separate shipments.

Doing the job

Work on a cool engine with the plug wire off. Clean around the filter cover before opening it so debris doesn't fall into the intake. Fish the fuel filter out of the tank with a bent wire, replace it, and set the new plug gap to the spec in your manual.

Use fresh fuel mixed at the ratio Husqvarna specifies, or a premixed fuel if the trimmer sits between jobs. Once it starts, let it warm up and check idle and full throttle. If it still runs poorly after a tune-up, the carburetor may need cleaning.

Write the date on the air filter cover with a paint pen so the whole crew knows when the machine was last serviced.