I have a 09 Cougar FTD with a 250 pro xs on it and I have about 215 hours on it. I was reading the maintenance section in the mercury book and it mentioned to change the plugs after 100 hours. What do you guys have to say about this? the boat runs great but I want to keep it in perfect condition. I will probably add 200 hours by December and I would like to know some input from you all. Thanks for the help
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