Genuine Husqvarna Spark Plug
Part #: 581362301

Fits these models and more:
150 BT (965877601) - Husqvarna Backpack Blower (SN: 20180500001 & Above)
IGNITION SYSTEM

150 BT - Husqvarna Backpack Blower (Original)
IGNITION SYSTEM

350 BF - Husqvarna Backpack Blower
IGNITION SYSTEM

350 BT - Husqvarna Backpack Blower
IGNITION SYSTEM

350 BT - Husqvarna Backpack Blower (SN: 20090900001 - 20170600000)
IGNITION SYSTEM

350 BT - Husqvarna Backpack Blower (SN: 20170600001 & Above)
IGNITION SYSTEM