Cylinder, piston and rings set for petrol sprayer GEKO 40 mm (spare parts)

High-quality replacement set consisting of a cylinder, piston and piston rings with a 40 mm bore designed for use in compatible petrol sprayers by GEKO. This spare parts set is intended to restore lost compression and engine performance by replacing worn or damaged moving components in handheld or backpack petrol sprayers with a matching bore diameter. The components are manufactured to fit typical small two-stroke sprayer engines and are suitable for repair or routine maintenance tasks.

Advantages

The set provides direct replacement components that help recover engine compression and reduce oil and fuel leakage into the combustion chamber. Using a matched cylinder, piston and rings ensures correct clearances and contact surfaces, which contributes to quieter operation and longer component life when installed properly. These parts are compact and practical for field repairs and do not require modification when used in devices with the specified bore size.

Suitable for

• Repairing handheld petrol (gasoline) sprayers with a 40 mm cylinder bore
• Servicing backpack sprayers and portable garden sprayers of matching engine size
• Replacing worn or damaged piston, rings and cylinder to restore compression
• Routine engine maintenance and component refurbishment in small two-stroke sprayer engines

Key specifications

• Bore diameter: 40 mm
• Includes: cylinder, piston, piston rings
• Compatibility: petrol sprayer small two-stroke engines with 40 mm bore
• Application: replacement for worn internal combustion components

How to use

Before installation, verify that the existing engine bore is 40 mm and inspect the crankcase, bearings and seals for additional wear that could affect performance. Disassemble the engine according to the manufacturer’s service instructions, remove the old cylinder, piston and rings, and clean mating surfaces and ports. Fit the new piston rings onto the piston with correct orientation and ring gap positioning, then insert the piston into the cylinder using appropriate assembly tools or a ring compressor if required. Reassemble the engine ensuring torque specifications and gasket integrity are observed, and prime or pre-lubricate per engine type where applicable.

Usage recommendations

Use genuine or equivalent quality gaskets and lubricants during reassembly, and perform a compression check after installation. Run the engine under light load initially to confirm proper seating of the rings and to detect any leaks or abnormal noises. Follow all safety precautions related to fuel handling and hot engine parts.