Multiquip 2742350207 Piston Ring Set Oversize 0.25MM EH09 - OEM Replacement Part

This oversize piston ring set restores compression and engine performance in worn EH09 series engines found in Multiquip rammers. The 0.25MM oversize specification is engineered for cylinders that have been bored to accommodate wear beyond standard tolerances, making it essential for mid-life engine rebuilds when standard rings no longer provide adequate sealing.

Designed for the Robin EH090D/EH092D gasoline engines used in MT55F rammers, these rings work with the air-cooled 4-stroke, single cylinder OHV engine producing 2.4 HP at 3600 RPM with 5.24 cubic inch displacement. The EH09 series engine features a 2.01 inch bore × 1.65 inch stroke configuration where proper ring seal is critical for maintaining the 600-695 blows per minute impact performance and 1,650-2,250 lbs per blow compaction force. Loss of compression from worn rings typically manifests as erratic jumping, reduced impact force, or difficulty maintaining proper engine speed under load.

Compatible with the following Multiquip rammer models:

• MT55F Tamping Rammer
• MTR40F Tamping Rammer

Genuine Multiquip OEM part, sold by an authorized dealer.