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  1. R

    Spark plugs for older Merc (80s)?

    For a compression test, should I do this with a cold engine or warm? Are there any safety tips I should be aware of? I watched a Youtube video where the Youtube basically removed the boots and plugs screwed/attached the tool that comes with the compression kit and cranked the motor five times...
  2. R

    Spark plugs for older Merc (80s)?

    Well, it starts fine, runs pretty good in forward and reverse... it's the neutral position where it hiccups... stalls and sputters... weird. A mechanic at Basspro said it's likely carb issue... I am going to attempt a compression test. Bulb wasn't that firm.. what does that indicate?
  3. R

    Spark plugs for older Merc (80s)?

    Hey folks, where are the serial numbers on these motors?
  4. R

    Spark plugs for older Merc (80s)?

    I found this at one of our local box stores. Is this the one you are referring to? Champion 827 L76V
  5. R

    Spark plugs for older Merc (80s)?

    Thank you. to both.. will look up serial...
  6. R

    Spark plugs for older Merc (80s)?

    Hello folks, First time poster! I recently bought a 16' fishing boat paired with a mid-80s 18HP Mercury XD. The seller believes it is a 1985. I still need to confirm this. But when I googled images of 85 Mercs, they look the same. Motor is idling rough and stalling while in neutral. I am going...
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