250 Pro XS - Spark Plugs/Gas

[Hicangler]

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?

[jbh3]

Check the FAQ pinned just above.

[Hicangler]

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.

[apdriver]

Spark plugs are a yearly maintenance item, or 100 hrs. Whichever comes first.

[EuropeanAM]

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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