Can Onan 11,000-Watt Tri Fuel Generator Run at High Altitude

Updated 08/25/2026 | Published 07/29/2026

Products Featured in This Question

Onan 11,000-Watt Tri Fuel Portable Generator - Gas, Propane, or Natural Gas - Remote Start

$2424.00

Cummins High Altitude Carburetor Kit for P11000iTF Generator

$14.28

Cummins High Altitude LP/NG Fuel Switch Kit for P11000iTF Generator

$284.35

Question:

We're taking our 5th wheel out to Colorado next summer and several of the campgrounds we're looking at are around 7,000-9,000 feet. Can I still use the CM98MR up there to run the AC or does it need anything special for higher elevations?

asked by: Nathan C

Expert Reply:

Hey Nathan! Yes, you can use the Onan 11,000-Watt Tri Fuel Portable Generator # CM98MR at those elevations. However, Cummins requires a high-altitude kit when operating above 2,000'.

The kit you need depends on which fuel you're using. For gasoline, Cummins lists the # CM65FV (A069E131) High Altitude Carburetor Kit. If you're running propane or natural gas, they list the # CM75FV (A069E132) High Altitude Fuel Switch Kit. You'll also want to be mindful of your overall power usage at higher elevations, especially when you're running your AC along with other high-draw appliances.

Are you planning on running the generator on gasoline or propane while you're out there?

expert reply by: Robin H

Tri Fuel Portable Generator
(click to enlarge)

Nathan C.

8/22/2026

Thanks Robin! Any chance you guys carry either of those kits? I'd rather order everything together if possible.

Robin H.

8/22/2026

@NathanC we're actually waiting on approval from Cummins to carry both of those kits right now. If you need one immediately, I'd reach out to Cummins directly and reference the A069E131 for gasoline or A069E132 for propane/natural gas. I'll update you here once we hear back or get them added to our site.