Review on Cummins 1671638 Onan Spark Plug by Isaiah Aaronson

Name: Cummins 1671638 Onan Spark Plug
Item: Cummins 1671638 Onan Spark Plug
Rating: 3

April 27, 2023

Terrible Spark Plug - Waste of Money

Based on our own experience, this spark plug was a complete letdown. It failed to ignite and caused our engine to consistently misfire. The only good thing we can say is that it was easy to install. Unfortunately, its poor performance makes it a waste of money. We do not recommend this spark plug.

Pros

High quality spark plug for Cummins engines.

Cons

Requires specific knowledge and tools for replacement.

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