Cummins/Onan — Exhaust Installation
Installation · Exhaust System
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Shield or insulate line if danger of personnel contact.
Procedure
- Pipe exhaust gases outside any enclosure.
- Use pipe at least as large as 2-1/2 inch pipe size outlet of engine exhaust.
- Increase pipe diameter one size for each additional 10 feet in length.
- Use flexible connection to engine exhaust manifold.
- Avoid sharp elbow turns; use sweeping type elbows.
- Install condensation trap at low point if exhaust line runs upward.
- Shield or insulate line if danger of personnel contact.
- Protect combustible walls with metal thimble.
- Install suitable muffler.
Specs & values
- 2-1/2 inch
- 10 feet
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.