Genuine Cummins Onan Green Label resistive spark plug for QG 5500 and 7000 series RV generators. Fits HGJAC, HGJAB, and HGJAA models, Spec A–K. Gap: 0.036". Replace every 450 hours. Sold individually — two required per generator. 90-day limited warranty.
The Cummins Onan 0167-1638 is the OEM-specified spark plug for the QG 5500 and 7000 series RV generators — covering the Emerald Advantage (HGJAC), Marquis Gold (HGJAB), and Marquis Platinum (HGJAA) model families across all spec letters A through K.
This is a resistive spark plug — and Cummins Onan specifically warns that using non-resistive plugs in these generators can cause generator shutdowns without triggering fault codes, making the failure difficult to diagnose. Using the genuine Green Label resistive plug eliminates this risk and ensures the ignition system operates as designed. Cross-references to NGK BPR4EY.
OEM-specified resistive spark plug for HGJAC, HGJAB, and HGJAA generators — tested to exact Cummins Onan specifications
Non-resistive plugs can cause shutdowns without fault codes on these generators — the Green Label resistive plug prevents silent failures
Gap to 0.036" before installing — fits all HGJAC, HGJAB, and HGJAA models Spec A–K; cross-references NGK BPR4EY
OEM-specified replacement interval is 450 hours — the longest of any routine consumable in the HGJA service schedule
This listing is for a single spark plug. The HGJAC, HGJAB, and HGJAA are twin-cylinder engines — two spark plugs are required per complete service. Order two if replacing both plugs at the same time. Always gap the plug before installation: Gap: 0.036" (0.91 mm) Confirm your model number and spec letter before ordering. Refer to your Cummins Onan Operator's Manual for the full maintenance procedure and 450-hour replacement interval.
Backed by a 90-day limited manufacturer's warranty. Cummins Power Generation warrants only the quality and integrity of Green Label Parts. Using non-Green Label or non-resistive spark plugs is not covered under the Cummins Onan warranty and may cause generator shutdowns without fault codes.
Always confirm fitment using your generator's complete model number, series code, and spec letter. This listing is for a single plug — two are required per complete tune-up on these twin-cylinder generators. Refer to your Cummins Onan Operator's Manual before ordering.