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250 Pro XS - Spark Plugs/Gas
Looked at some older threads for which I can’t access links. But, what is recommended for how often to change spark plugs? Do you go with a specific Mercury spark plug or are there others that will work just as well? Also, I was told by a mechanic to run 89 octane gas with the Quickleen/Quickcare combo and I have been religious with that, however, I’m seeing folks saying not to run over 87 octane - what’s the consensus?
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Check the FAQ pinned just above.
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Ok - thanks. Looks like I’m good with 89 octane and the Mercury cocktail. Read what was there on spark plugs - maybe my eyes aren’t working but did not see the guidelines for how often they need to be replaced.
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Member
Spark plugs are a yearly maintenance item, or 100 hrs. Whichever comes first.
2013 BassCat Cougar
Serial # 1B962763
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Mercury 3L/4 Stroke/Verado Moderator
Check out the "Recommended Annual Maintenance (and Winterization) for Optimax Engines" thread in the FAQ.
You should be running 87 octane.
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