See part 16 in the diagram

Piston 521578301

Works with your model 525HE4!

$19.49

Works with your model 525HE4!

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Troubleshooting

This part works with the following brands:

This part works with the following products:

Part# 521578301 replaces these:

5215783-01, 584901201,

This part works with the following models:

ERP Number: ERP16350703
Manufacturer Part Number: 521578301

Brand	Model Number	Description
Husqvarna	325HE3	Hedge Trimmer - 325 He3 (966787601 From 20150100001-Current)
Husqvarna	325HE4	Hedge Trimmer - 325 He4, 966787701 From 20150100001-Current
Husqvarna	445E	Chainsaw - 445 E (20103600001-20112700000)
Husqvarna	524L	Trimmer - Trimmer
Husqvarna	525DEPSMADSAW	Pole Saw - 525deps Madsaw
Husqvarna	525ECS	Edger - 525 Ecs
Husqvarna	525ES	Trimmer - Trimmer
Husqvarna	525HE3	Trimmer - Hedge Trimmer
Husqvarna	525HE4	Trimmer - Hedge Trimmer
Husqvarna	525HF3S	Trimmer - Hedge Trimmer
Husqvarna	525L	Brush Cutter - 525 L (2013-03)
Husqvarna	525LK	Brush Cutter - 525 Lk (2013-03)
Husqvarna	525LS	Brush Cutter - 525 Ls (2013-03)
Husqvarna	525LST	Brush Cutter - 525 Lst (2013-03)
Husqvarna	525P4S	Pole Saw - Pole Pruner
Husqvarna	525P5S	Pole Saw - Pole Pruner
Husqvarna	525PT5S	Pole Saw - Pole Pruner
Husqvarna	525RJD	Brush Cutter - 525 Rjd (2013-03)
Husqvarna	525RJX	Brush Cutter - 525 Rjx (2013-03)
Husqvarna	525RK	Brush Cutter - 525 Rk (2013-03)
Husqvarna	525RS	Brush Cutter - 525 Rs (2013-03)
Husqvarna	525RX	Brush Cutter - 525 Rx (2013-03)
Husqvarna	525RXMARKII	Brush Cutter - 525rx Mark Ii
Husqvarna	525RXT	Brush Cutter - Brushcutter
Husqvarna	525RXTMARKII	Brush Cutter - 525rxt Markii
Husqvarna	G1	Lawn Mower - Automower G1 (1998-2003)
RedMax	G3200	Chainsaw - Chain Saws
RedMax	G3200EZ	Chainsaw - Chain Saws
RedMax	GZ4500	Chainsaw - Chain Saws