Certification for Nonroad (NR) Spark-Ignition (SI) Engines

Related Topic
For all nonroad, see:

Follow these steps for certification.

STEP 1: Confirm that you have access to EV-CIS.

You must register with EPA to gain access to EV-CIS for the specific manufacturer code  for which you are seeking certification.
You must also set up an account with EPA to establish the necessary EV-CIS roles.

STEP 2: Update manufacturer information in EV-CIS.

To update information, users must have the "Maintain Manufacturer Information" role in EV-CIS. Otherwise, users will only be able to view the information.

Information to Update
Updates include (but are not limited to):
  • Industry sector(s);
  • Addresses;
  • Contacts and Industry/Compliance Programs;
  • Test labs; and
  • Notification email addresses (used for EV-CIS' broadcast notifications).

STEP 3: Review all applicable regulations.

Regulations provide requirements for certification and compliance.

Regulations
Review the following:
  • 40 CFR Part 1045
    Control of emissions from new, gasoline boats and personal watercraft.
  • 40 CFR Part 1048
    Control of emissions from new large spark-ignition engines.
  • 40 CFR Part 1054
    Control of emissions from new, small nonroad spark-ignition engines and equipment.
  • 40 CFR Part 1060
    Control of evaporative emissions from new and in-use nonroad and stationary equipment.
  • 40 CFR Part 1065
    Engine testing procedures.
  • 40 CFR Part 1068
    General compliance provisions for highway, stationary, and nonroad programs.

STEP 4: Pay appropriate certification fees, as applicable.

A fee payment may be required for each certificate issued by EPA.

For more details, go to: Fees Information

STEP 5: Prepare certification application materials.

For each model year for a family, you must provide the applicable certification dataset and supporting materials.

Support Documentation for Submissions

Materials for All NRSI (small SI, large SI, marine SI, evaporative)

Materials Specific to Small NRSI Engines/Equipment

Materials Specific to Large NRSI Engines/Equipment

Materials Specific to Marine SI Engines/Equipment

Materials Specific to NRSI Evaporative Components/Equipment

Materials for All EV-CIS Users

STEP 6: Submit the completed certification application materials in EV-CIS.

Login to EV-CIS through the CDX portal: Central Data Exchange (CDX)

Click the applicable industry role on the MyCDX homepage.

Submit the completed certification dataset and upload any required supporting materials.

STEP 7: Confirm that your submission(s) from Step 6 were accepted by EV-CIS.

Within a few minutes of all submissions, the submitter will receive a notification in their CDX inbox indicating whether the submission was accepted or rejected.

To access your CDX inbox, click the "Inbox" link on the left navigation bar of the MyCDX homepage.

STEP 8: Submit a request for certificate (RFC).

A CROMERR signer must submit an RFC for each Engine Family.

To do so, click the "CROMERR Signer" role on your MyCDX homepage.

Additional resources:

STEP 9: Receive Certificate of Conformity.

The CROMERR signer will receive the certificate in his or her CDX inbox.

To access your CDX inbox, click the "Inbox" link on the left navigation bar.

Vehicle and Engine Certification

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Last updated on January 6, 2026