95 Venom Spark Plugs

The spark plug chart pinned calls for QL78YC plugs for my 95 225 Venom, My book calls for QL77JC4 and thats the plugs currently in the engine.

Which is right?

Thanks in advance.....

Your book was published in 1994, the factory changed recommendations to QL78YC in either '95 or '96, and the factory plug chart is up to date each year.

Think of it this way, would you want you doctor to keep practicing medicine using the text books, prescriptions and procedures from 1988 when he graduated med school?

78's it is then!
thanks,
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