Husqvarna Seal for 372XP X-Torque Clutch Side

This Husqvarna 372XP X-Torque crankshaft seal fits the clutch side of the crankcase. A two-stroke needs an airtight crankcase to run right, and a worn crank seal draws in extra air, causing a high or hanging idle, lean running and the risk of a scored piston.

Signs of a leaking crank seal

The 372XP X-Torque is a strong mid-size saw for felling and bucking. If it starts racing at idle, won't hold a tune, or runs hot and lean even after a carb clean, a crank seal may be leaking. On the clutch side, seals can also be damaged by heat from a slipping clutch.

A pressure and vacuum test is the best way to confirm the leak before you tear into the saw.

Crank seals harden with age and heat, and saws that sit for long periods are especially prone to seal problems. A seal leak can also come from a crankshaft with too much end play or from damage during a previous repair. If you are replacing one seal, check the other one too, since both are the same age. A fresh pair of seals can make an older 372XP X-Torque run like it should again.

Replacing the seal

Remove the clutch, oil pump drive and other parts to reach the seal. Pry out the old seal without scratching the crankshaft or the case, then press the new one in square to the correct depth. A light coat of oil on the lip helps it seat without damage.

If you are not set up for this job, a saw shop can do it quickly. Find more 372XP parts in our chainsaw parts section.