Piston Ring Set 49mm x 1.5mm for Stihl 039 MS310 MS390 Chainsaw 1127 034 3007 2 Rings

Piston ring set for Stihl 039, MS310 and MS390 chainsaws — 49mm x 1.5mm, two rings.

Rings wear out long before the piston does. A fresh set 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 set supplied in our 49mm piston and cylinder kit (QG39049F), available here on its own.

⚠️ Check your bore size before ordering:

These rings are 49mm. Measure across the top of your existing piston before ordering — if it is a different size, these will not fit.

Will not suit the MS391.

Specifications:

Spec	Detail
Diameter	49mm
Thickness	1.5mm
Quantity	2 rings
Replaces OEM	1127 034 3007
Type	Aftermarket replacement part

A note on the OEM number: Stihl supply this ring individually under 1127 034 3007. The engine uses two, so you will see the same part number listed elsewhere as a single ring. This listing is for a set of two, which is what our cylinder kits use.

Suits Stihl:

039 - MS310 - MS390 with a 49mm bore

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

What you get:

2x piston rings

Piston, gudgeon pin and circlips are not included. If you need the complete piston, see our Stihl 49mm 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 each ring gap seats either side of its 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	QG39049F-P-Rings
Model #	QG39049F-P-Rings
Barcode #	721814475456
Brand	JONO & JOHNO
Shipping Weight	0.0500kg
Shipping Width	0.050m
Shipping Height	0.050m
Shipping Length	0.050m
Shipping Cubic	0.000125000m3