OTTO Excavator Parts Cxh50S 6Wa1 Valve Spring Big 1125610936 112561-0936 1-12561093-6 For Isuzu OTTO Isuzu CXH50S 6WA1 Valve Spring Big 1125610936 – 100% genuine OEM excavator part, perfect fit for Isuzu 6WA1 engines. Bulk in-stock, fast global shipping. Superior elasticity & fatigue resistance vs aftermarket big springs, cuts rework & returns, boosts resale profits for wholesalers & agents.