Cummins/Onan M-1902s — Exhaust Installation
Installation · exhaust system
For the Cummins/Onan M-1902s, from the Cummins/Onan service manual.
Applies to: Cummins/Onan HDKA, Kubota V1505-E3BG engine
Before you start
- Do not terminate exhaust pipe under the vehicle.
- Do not use flexible exhaust tailpipe.
Procedure
- Complete downpipe plumbing from engine exhaust manifold before setting unit in place.
- Install elbow on downpipe, then turn muffler onto elbow with cleanout plug facing downward.
- Attach tailpipe to muffler with U-bolt type clamp and hanger.
- Support exhaust system at or near the perimeter of the vehicle.
- Extend pipe at least one inch outside the vehicle.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Use 1-1/2 inch (38.1 mm) I.D. 18 gauge rigid steel tubing for tailpipe
- Maximum allowable back pressure 2.57 inches (65 mm) mercury (8.7 kPa)
- Exhaust system no closer than 3 inches (76 mm) from combustible material
Full service-parts list: Cummins/Onan HDKA →, Kubota V1505-E3BG engine →
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.