Yes, there is a difference between RC7YC and RC9YC spark plugs. The primary distinction lies in their heat range, with RC7YC being a hotter plug and RC9YC a colder one. This means the RC7YC is designed for applications where the engine operates at higher temperatures, while the RC9YC is suited for lower temperature environments, helping to prevent pre-ignition and improve performance in high-performance or modified engines. Always consult your engine's specifications to choose the appropriate spark plug for your needs.
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the rc7yc3 has superseded the rc7yc in 2007.. theoretically the -3 is improved in some way. If you check the cross reference champion/ngk you'll find different codes. I Don't have knowledge in what are different, sorry.
BCPR7ES
0.044 inch Champion RC9YC
The Polaris Ranger utility vehicle. Listed in owners manual for the 2006 anyway.
The Champion RC7YC spark plug is not the recommended spark plug for the Polaris Sportsman 600. The correct spark plug for this model is typically the NGK DCPR7E or equivalent, depending on the year. Always consult your owner's manual or a professional mechanic to ensure the right fit for optimal performance. Using the incorrect spark plug can affect engine performance and reliability.
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