Octane requirements for HP500?
#1
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Octane requirements for HP500?
I recently purchased a Fountain 38EC with twin HP500's. Reading through the Mercury engine literature I was surprised to see Merc recommends 87 octane for these engines. Is this a misprint?
Last edited by SR-71; 02-24-2012 at 05:35 PM.
#2
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nope,,,,,87,,,its a low compression motor,,,thats all it needs
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Last edited by obnoxus; 02-24-2012 at 07:47 AM.
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No misprint. They run fine on that. Personally I find 89 is the best for them. 91 and up is too high Imo. Better combustion with the lower octane stuff. They are only 500 hp 502s.
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