Restore your outboard’s performance with this OEM standard size piston and ring set, designed for engine rebuilds where the cylinder bore remains within factory specifications. Whether you’re freshening up a well-maintained engine or replacing damaged components, a properly fitted piston and ring assembly is critical to maintaining compression, power, and reliability.
The piston and rings are at the heart of every 2-stroke engine. They seal combustion pressure, transfer heat from the piston to the cylinder wall, and help maintain efficient engine operation throughout the RPM range. Worn pistons or rings can lead to low compression, reduced power, poor throttle response, and increased fuel consumption.
This standard-size piston and ring set is designed for engines that do not require cylinder boring, providing the correct fit for standard bore applications. When paired with proper measurements and installation procedures, it helps restore factory performance and dependable operation.
At Liquid Revolutions, we’ve rebuilt everything from recreational fishing motors to national-level race engines. One thing remains constant: proper piston and ring fitment is essential for performance, reliability, and engine longevity.
Common Signs of Piston & Ring Wear
- Low compression readings
- Loss of power
- Hard starting
- Excessive blow-by
- Increased fuel consumption
- Piston scuffing or ring wear
Key Features & Benefits
- Standard Bore Size – Designed for engines that remain within factory cylinder specifications
- Complete Piston & Ring Set – Includes piston and matching rings for proper sealing and performance
- Restores Compression – Helps improve power, throttle response, and engine efficiency
- Improves Reliability – Ideal for routine rebuilds and preventative maintenance
- Precision Engine Component – Critical for proper combustion and long engine life
- Designed for Johnson & Evinrude Applications – Compatible with select outboard engines
Whether you’re rebuilding a recreational outboard or refreshing a high-performance engine, this standard piston and ring set provides the fit, compression, and reliability needed to keep your Johnson or Evinrude outboard running strong for years to come.
Replaces: 0390457, 0391798, 0778462
