PISTON RINGS HUSQVARNA 346 345 242 OLEOMAC 746 REPL OEM 503 28 90-05 42mm X 1.5

Piston Rings for Husqvarna 346, 345, 242 and Oleomac 746

These replacement piston rings, referencing OEM part number 503 28 90-05, are designed for 42mm x 1.5mm cylinders to restore compression in compatible chainsaws.

Overview

Piston rings for Husqvarna 346, 345, 242 and Oleomac 746 chainsaws are precision-engineered to seal the combustion chamber and transfer heat. These piston rings replace worn rings and help restore engine power and efficiency. The 42mm x 1.5mm size matches original specifications for reliable fitment.

Built For Performance

• Manufactured from durable cast iron for long service life
• Precision-ground to exact 42mm x 1.5mm dimensions
• Rapid break-in design reduces cylinder scoring
• Resistant to high temperatures and pressure in two-stroke engines
• Direct replacement for OEM 503 28 90-05

Fits These Machines

• for Husqvarna 346
• for Husqvarna 345
• for Husqvarna 242
• for Oleomac 746

On-The-Job Use

• Engine rebuilds for chainsaws and power equipment
• Restores compression after ring wear
• Replaces damaged or broken piston rings
• Used in routine top-end overhaul

Specs At A Glance

Good To Know

Q: Will these piston rings fit other chainsaw brands? A: These are specifically designed for the listed Husqvarna and Oleomac models; always verify bore diameter and ring thickness before purchasing.

Q: Do I need to replace other parts when installing new rings? A: It is recommended to inspect the cylinder for scoring and replace the piston if worn, and use a new cylinder gasket set for a proper seal.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.