77Mm Engine Rebuild Kit for Kohler Command CH18 CV18 CH620 | Includes Pistons, Rings, Gaskets, Crankshaft Seals & Sealer. Fits CH18-CH22, CH620-CH641, CV18-CV22.

Description

Package Dimensions	17 x 14 x 3 inches
Manufacturer	Performance Saw Supply

Lil Red Barn 77mm Standard Bore Engine Rebuild Kit for Kohler Command and Command Pro Twin-Cylinder Engines A complete top-end overhaul kit for Kohler's 624cc twin-cylinder engines. Restores compression and seals the engine properly for continued service in commercial and residential outdoor power equipment. WHAT'S INCLUDED 2 pistons (77mm standard bore, Kohler part 25-874-46-S) with wrist pins and circlips 2 complete piston ring sets Complete gasket set including head gaskets, valve cover gaskets, intake and exhaust gaskets, and small O-rings 2 crankshaft oil seals Crankcase sealer CRITICAL: VERIFY 77mm BORE (624cc DISPLACEMENT) BEFORE ORDERING Kohler produced CH620 and CH640 engines in TWO different bore sizes during production: Early production: 77mm bore, 624cc displacement (this kit fits) Later production: 80mm bore, 674cc displacement (this kit does NOT fit) Check your engine's data plate for displacement. Engines with 624cc stamped on the nameplate are correct for this kit. Engines with 674cc need our 80mm rebuild kit instead. COMPATIBLE KOHLER ENGINES (77mm bore, 624cc) Horizontal shaft (CH-series): CH18, CH20, CH20S, CH22, CH620 (early production), CH621 (early production), CH640 (early production), CH641 (early production) Vertical shaft (CV-series): CV18, CV20, CV22, CV620, CV621, CV640 All are 4-cycle OHV twin-cylinder engines with cast iron cylinder liners and aluminum blocks, rated 17-22 HP. ENGINE SPECIFICATIONS Engine type: 4-cycle, gasoline, OHV Cylinder liners: Cast iron Block: Aluminum Bore: 3.03" (77mm) Stroke: 2.64" (67mm) Displacement: 624cc Compression ratio: 8.5:1 Rated power: 17-22 HP depending on model EQUIPMENT APPLICATIONS These Kohler engines power a wide range of commercial and residential outdoor power equipment, including zero-turn mowers, riding lawn tractors, garden tractors, generators, pressure washers, wood chippers, and industrial machinery. CROSS-REFERENCES Kohler piston part number: 25-874-46-S Backend Search Terms (for reference) kohler ch18 ch20 ch20s ch22 ch620 ch621 ch640 ch641 cv18 cv20 cv22 cv620 cv640 command pro twin engine rebuild overhaul kit pistons rings gaskets seals sealer 25-874-46-s 77mm 624cc 17hp 18hp 20hp 22hp v-twin ohv zero turn mower riding tractor generator Listing 5: B0C4ML81ND (77mm Kohler Ring Kit — Overhaul Kit) Looking back at our earlier work, this was listed in the Phase 2 analysis as "Lil Red Barn 77mm Overhaul Kit for Kohler CH18 CH20 CH22 CV18 CV20 CV22." Let me confirm what this SKU actually is before I write: Based on the analysis data, this appears to be your 77mm ring-and-gasket kit (no pistons) — the mid-tier kit that goes between your ring-only kit and your complete rebuild kit. If that's wrong and this is actually a different variant, let me know and I'll adjust. Here's the rewrite assuming ring/gasket kit for the 77mm family: New Title (already updated per your note) Lil Red Barn 77mm Overhaul Kit for Kohler CH18 CH20 CH22 CV18 CV20 CV22 New Item Highlights (98 chars) Rings, gasket set, crankcase sealer & crankshaft seals. Fits 77mm Kohler Command twin engines. New Bullet Points Bullet 1 77mm KOHLER RING AND GASKET REBUILD KIT — Includes 2 piston ring sets, complete gasket set with head gaskets and valve cover gaskets, 2 crankshaft seals, and crankcase sealer. For buyers re-ringing existing pistons — pistons are NOT included. If your pistons show significant wear, order our 77mm complete overhaul kit with pistons instead. Bullet 2 FITS 77mm KOHLER COMMAND AND COMMAND PRO TWIN ENGINES — 624cc DISPLACEMENT — Compatible with CH18, CH20, CH20S, CH22, CH620 (early production 624cc), CH621, CH640 (early production 624cc), CH641, CV18, CV20, CV22, CV620, CV621, CV640. All are 77mm standard bore, 624cc, 4-cycle OHV twin engines rated 17-22 HP. Bullet 3 CRITICAL: VERIFY 77mm BORE BEFORE ORDERING — Kohler produced CH620 and CH640 engines in both 77mm (624cc, this kit) and 80mm (674cc, different kit) versions. Check your engine nameplate for displacement — 624cc engines are correct for this kit. If your engine is 80mm bore/674cc, see our 80mm rebuild kit instead. Bullet 4 NEED A DIFFERENT LEVEL OF REBUILD? — This is our 77mm ring and gasket kit. Lil Red Barn also offers a 77mm overhaul kit that adds pistons for buyers whose pistons show wear, and a 77mm complete rebuild kit that adds connecting rods and valves. Cross-references Kohler ring set applications for these engines. Bullet 5 MANUFACTURED BY LIL RED BARN — Selling quality small engine parts since 2014. Rings and gaskets produced at our own facility to our specifications. We specialize in hard-to-find parts for engines that manufacturers have stopped supporting. Backed by responsive U.S.-based customer service. New Description Lil Red Barn 77mm Ring & Gasket Rebuild Kit for Kohler Command and Command Pro Twin-Cylinder Engines A ring and gasket rebuild kit for Kohler 77mm bore twin-cylinder engines. Restores compression and seals the engine properly on engines where the existing pistons are still serviceable. WHAT'S INCLUDED 2 complete piston ring sets Complete gasket set including head gaskets, valve cover gaskets, intake and exhaust gaskets, and small O-rings 2 crankshaft oil seals Crankcase sealer WHAT'S NOT INCLUDED This kit contains rings, gaskets, seals, and sealer only. It does NOT include: Pistons Connecting rods Valves Wrist pins or circlips If your pistons show significant wear or scoring, order our 77mm complete overhaul kit with pistons instead of this ring-only kit. CRITICAL: VERIFY 77mm BORE (624cc DISPLACEMENT) BEFORE ORDERING Kohler produced CH620 and CH640 engines in TWO different bore sizes during production: Early production: 77mm bore, 624cc displacement (this kit fits) Later production: 80mm bore, 674cc displacement (this kit does NOT fit) Check your engine's data plate for displacement. Engines with 624cc stamped on the nameplate are correct for this kit. COMPATIBLE KOHLER ENGINES (77mm bore, 624cc) Horizontal shaft (CH-series): CH18, CH20, CH20S, CH22, CH620 (early production), CH621 (early production), CH640 (early production), CH641 (early production) Vertical shaft (CV-series): CV18, CV20, CV22, CV620, CV621, CV640 All are 4-cycle OHV twin-cylinder engines with cast iron cylinder liners and aluminum blocks, rated 17-22 HP. ENGINE SPECIFICATIONS Engine type: 4-cycle, gasoline, OHV Cylinder liners: Cast iron Block: Aluminum Bore: 3.03" (77mm) Stroke: 2.64" (67mm) Displacement: 624cc EQUIPMENT APPLICATIONS These Kohler engines power a wide range of commercial and residential outdoor power equipment, including zero-turn mowers, riding lawn tractors, garden tractors, generators, pressure washers, and industrial machinery.

• COMPLETE 77mm TOP-END REBUILD KIT FOR TWIN-CYLINDER KOHLER ENGINES — Includes 2 matched pistons with wrist pins and clips, 2 complete ring sets, full gasket set with head gaskets and valve cover gaskets, 2 crankshaft seals, and crankcase sealer. Note: connecting rods, valves, and bearings are NOT included in this kit.
• FITS ALL 77mm KOHLER COMMAND ENGINES — 624cc DISPLACEMENT — This kit replaces both pistons and rings as a matched set, so it fits all 77mm bore Kohler engines regardless of the original piston configuration. Important: Kohler produced CH620 and CH640 engines in both 77mm (624cc, this kit) and 80mm (674cc, different kit) versions. Verify your engine displacement — engines with 624cc stamped on the nameplate are correct for this kit.
• COMPATIBLE KOHLER ENGINE MODELS — Kohler Command and Command Pro twin-cylinder 77mm engines: CH18, CH20, CH20S, CH22, CH620 (early production), CH621 (early production), CH640 (early production), CH641 (early production), CV18, CV20, CV22, CV620, CV621, CV640. All are 77mm standard bore, 624cc displacement, 4-cycle OHV engines rated 17-22 HP.
• RESTORE COMPRESSION AND EXTEND ENGINE LIFE — Ideal for engines showing worn compression, oil consumption, blue smoke, or hard starting. These 17-22 HP Kohler Command twin-cylinder engines power a wide range of commercial and residential outdoor power equipment including zero-turn mowers, riding lawn tractors, garden tractors, generators, pressure washers, and industrial machinery. Cross-references Kohler OEM piston part number 25-874-46-S.
• MANUFACTURED BY LIL RED BARN — Selling quality small engine parts since 2014. Pistons and rings produced at our own facility to our specifications. We specialize in hard-to-find parts for engines that manufacturers have stopped supporting — when factory parts disappear, we reproduce them. Backed by responsive U.S.-based customer service.