Spark plug replacement
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Spark plug replacement

  1. #1
    Senior Member thumbs's Avatar
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    Default Spark plug replacement

    350 mag

    How often should I be replacing the spark plugs and or wires? I remember them costing about $100 just for the plugs the last time I had it serviced by a shop.

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  3. #2
    BANDAID DUDE! HiMark Racing's Avatar
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    $100 for plugs?? Find a new shop! 100 hours easy on that motor.
    "When you see the tree you're about to hit, it's called under steer. When you can only feel and hear it, it's called over steer."

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    A local certified Mercruiser dealer/service just gave me a price of $19.95 per spark plug......

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  6. #4
    Senior Member rampgirlll's Avatar
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    I'm no Jim Wilkes but can't ya just do it yourself...most technical aspect of it is gapping them.
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  7. #5
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    Quote Originally Posted by rampgirlll View Post
    I'm no Jim Wilkes but can't ya just do it yourself...most technical aspect of it is gapping them.
    Yes I can easily do it myself and will. When I don't bring my boat home during the winter I just have a shop out there do my service. Hence the expensive spark plugs I guess. I'll be bringing the boat next week so we can cruise the harbor and check out the boat parade so I thought I might as well do my own service since it's home. I called a local shop for the part to do it myself and they quoted me the $20 per plug price. I'll do all the motor service and let Jim service the drive and a few other things.

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