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Exhaust System Calculator

Design and analyze your boat's wet exhaust system

Quick Samples
Try these common configurations to get started

75HP Inboard Diesel

Common auxiliary sailboat engine

350HP Inboard Gasoline

V8-powered sport boat

500HP Performance Diesel

Large sport fishing yacht

Hull Dimensions
Enter your boat's principal dimensions
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About This Tool
This calculator provides an estimate for the design of a marine wet exhaust system. It calculates the required pipe diameter based on engine power and estimates the system's back pressure, a critical factor for engine health and performance.

Key Concepts:

Back Pressure: The resistance in the exhaust system that the engine must overcome.
Waterlift Muffler: Uses water to cool exhaust and prevent back-siphoning.
Riser Height: The vertical loop that keeps water out of the engine.
Pipe Diameter: Crucial for allowing exhaust gases to escape efficiently.
Frequently Asked Questions

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