How much compression should a used snowmobile engine have?

A used snowmobile engine should typically have a compression ratio between 120 to 150 psi (pounds per square inch) for optimal performance, though this can vary based on the engine type and manufacturer specifications. A reading significantly below this range may indicate wear or damage, while excessively high readings could suggest issues like engine damage or improper operation. It's important to consult the specific snowmobile's service manual for the recommended compression values. Regular maintenance and checks can help ensure the engine remains in good condition.