Piston Ring 50mm x 1.2mm for Husqvarna 371 372 372XP Chainsaw 503 28 90-36 1 Ring

Piston ring for Husqvarna 371, 372 and 372XP chainsaws — 50mm x 1.2mm.

Rings wear out long before the piston does. A fresh ring restores lost compression and brings a tired saw back to life, at a fraction of the cost of a full top end rebuild.

This is the same ring supplied in our 50mm piston and cylinder kit (QG37250R), available here on its own.

⚠️ Check your ring thickness before ordering:

The 372 was built with two different ring thicknesses at the same 50mm bore. These are the 1.2mm rings, which match the cylinder kit we sell.

Some 372 models run a piston that takes 1.5mm rings. If yours is one of those, these will not fit. Take your old ring out and measure its thickness before ordering if you are not certain.

Specifications:

Spec	Detail
Diameter	50mm
Thickness	1.2mm
Quantity	1 ring
Replaces OEM	503 28 90-36
Type	Aftermarket replacement part

Suits Husqvarna:

371 - 372 - 372XP with a 50mm bore and 1.2mm rings

If your saw is not listed, or you are unsure of your ring thickness, get in touch before ordering and we will check it for you.

What you get:

1x piston ring

Piston, gudgeon pin and circlips are not included. If you need the complete piston, see our Husqvarna 372 piston kit. For a full top end, see our piston and cylinder assembly kit.

Fitting tip:

Two-stroke rings sit over a locating pin in the piston groove that stops the ring rotating into a port. Make sure the ring gap seats either side of that pin before sliding the piston into the cylinder — forcing it in misaligned will break the ring.

WARRANTY OVERVIEW

Jono & Johno offers a 12-month warranty on most products.

We pride ourselves on selling good quality gear and will be fair and prompt in honouring our warranties. If you’re in trouble, we’ll help you out.

WHAT IS COVERED?

The exact warranty coverage depends on two factors:

Whether the fault is due to user error or a manufacturer defect
Whether the fault is minor or major

Minor faults caused by the user

Parts will be supplied for repair at the user's expense.

Minor faults caused by the manufacturer

Customers are expected to perform basic repairs as part of our warranty process.
Jono & Johno will provide replacement parts and instructions for simple repairs, such as installing a recoil starter.
Jono & Johno will determine whether a fault is classified as minor.
If unsure about a repair, contact us, and we’ll assist you.

Major faults caused by the manufacturer

Jono & Johno will arrange a return, refund, or replacement at our expense.
If preferred (and at our discretion), we may provide replacement parts and contribute to labour costs if you can perform the repair.

Major faults caused by the user

Where possible, parts will be supplied at the user's expense.
If the item cannot be repaired by the user, we offer repairs at our workshop at $80 AUD per hour.
The customer will need to cover return shipping costs for user-related faults.

RETURN PROCESS & SHIPPING COSTS

If you need to return your product:

In-store return: If you're near a Jono & Johno outlet, you can return the product in person. Contact us first to arrange a return authority.
Shipping return: If you are not within driving distance, we will provide a return address.
- If the fault is due to a manufacturer defect, we’ll cover return costs.
- If the fault is user-related, the customer is responsible for return shipping.

EXCEPTIONS TO THE RULE

Some products are not covered by warranty, including:

Engines used in go-karts and stump grinders

OUT-OF-WARRANTY PRODUCTS

If your product is out of warranty and has failed despite minimal use, contact us. We may assess it on a case-by-case basis. If a manufacturer defect is identified, we aim to be fair in resolving the issue—but this is at our discretion.

SKU	QG37250R-P-Ring
Model #	QG37250R-P-Ring
Barcode #	721814475685
Brand	JONO & JOHNO
Shipping Weight	0.0500kg
Shipping Width	0.050m
Shipping Height	0.050m
Shipping Length	0.050m
Shipping Cubic	0.000125000m3