Marine Engine Compression Testing
Mechanical Condition Evaluation Service
Great River & Lakes Marine Surveying Co. offers marine engine compression testing to assist in evaluating internal engine condition at the time of inspection. Compression testing is used as a diagnostic support tool to identify cylinder sealing consistency and potential internal wear conditions that are not visible during a standard visual inspection.
What Is Marine Engine Compression Testing?
Compression testing measures the pressure developed within each engine cylinder during cranking. Results are compared across cylinders to assess consistency and identify irregularities that may indicate internal mechanical conditions.
Testing is performed where engine configuration, access, and manufacturer guidance allow.
What Compression Testing May Identify
Compression testing may assist in identifying:
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Cylinder pressure imbalance
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Valve sealing irregularities
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Piston ring or cylinder wear indicators
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Mechanical conditions warranting further evaluation
Results are recorded at the time of testing and interpreted as diagnostic indicators only.
How Compression Testing Is Used
Marine engine compression testing is commonly requested during:
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Pre-purchase marine surveys
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Machinery condition evaluations
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Commercial vessel inspections
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Insurance and damage assessments
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Maintenance planning and baseline documentation
Compression testing is typically used in conjunction with visual inspection, operational observations, temperature checks, and oil sample analysis to provide a broader assessment of engine condition.
Why Choose Great River & Lakes
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30+ years marine industry experience
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Reports accepted by insurers and lenders
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Clear, unbiased documentation
Contact us to schedule a pre-purchase marine survey and proceed with confidence.
