Two standard 77mm piston ring sets for the Kohler 624cc twin-cylinder engines, one set per cylinder. Each set has a top compression ring, a second compression ring and a three-piece oil ring. Pistons, gaskets and seals are not included. They fit the CH18, CH20, CH22, CH620, CH621, CH640 and CH641, the CV18, CV20, CV22, CV620, CV624 and CV640, and the LH640 and LV625. Some CH22, CH620 and CH640 engines are the 80mm, 674cc version, so check the displacement on the nameplate. They replace ring set 24-108-22-S, also written 24 108 22 or 2410822. These are standard-bore rings; a rebored cylinder needs .008, .010, .020 or .030 oversize rings to match. Before assembly, check each bore for taper and out of round and the ring grooves for wear, check ring end gap in the bore, and use a ring compressor.
- TWO STANDARD RING SETS - One set per cylinder: top compression ring, second compression ring and three-piece oil ring. Pistons, gaskets and seals are not included.
- FITS KOHLER 77MM, 624CC TWINS - CH18, CH20, CH22, CH620, CH621, CH640, CH641, CV18, CV20, CV22, CV620, CV624, CV640, LH640 and LV625. Some CH22, CH620 and CH640 engines are the 80mm, 674cc version, so check the displacement on the nameplate.
- REPLACES RING SET 24-108-22-S - Also written 24 108 22 or 2410822. If your parts list shows it for your engine, these sets cover it.
- STANDARD BORE ONLY - For a cylinder that has not been bored oversize. A rebored cylinder needs rings to match its size: .008, .010, .020 or .030 oversize.
- MEASURE BEFORE IT GOES TOGETHER - Check each bore for taper and out of round and the ring grooves for wear; rings will not seal a scored or out-of-round bore. Check ring end gap in the bore, and use a ring compressor.