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Fuel ?'s

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Old 08-10-2010, 12:51 PM
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I have a New Powerquest to me it's a 260 legend and I am wondering if you guy's are burning Premuim or I am good with Mid-grade .

Thanks in advance for the feedback
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Old 08-10-2010, 01:04 PM
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Originally Posted by Playtime185 View Post
I have a New Powerquest to me it's a 260 legend and I am wondering if you guy's are burning Premuim or I am good with Mid-grade .

Thanks in advance for the feedback
Check the label on the top of the motor, 87 octane is fine for most Mercruiser except their Blue motors.
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Old 08-11-2010, 12:45 PM
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What engine?????????

Merc black engines and non supercharged Merc Racing blue engines are fine on 87 octane. Running 87 non ethanol fuel will burn the cleanest and keep your transom from getting black.
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Old 08-12-2010, 09:09 PM
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Id run midgrade, it may say your ok on 87 but Ive seen enough burnt valves because of it.
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Old 08-12-2010, 09:32 PM
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86 or 87!
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Old 08-12-2010, 09:35 PM
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Id run midgrade, it may say your ok on 87 but Ive seen enough burnt valves because of it.
never seen a race engine with burnt valves using 87/86! 502 mpi's/500hp and 525's all have made 5-7hp more on the dyno and have no deposits that are abnormal. they are ALWAYS running WOT too.!!!
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