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Originally Posted by Aquadeziac
First of all most all Marinas I've seen have 89 octane, which is equivelent to mid-grade on the road(regular being 87 octane). At one time I believe there were a very limited number of Marinas selling 93 octane. You might check that out. Anyone out there know?
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up until this year, my boat had a 4.3L Mercruiser that dieseled on after ignition cut off unless premium was in the tank. I got it at Y-Landing (merideth) and at Goodhue&Hawkins (wolfeboro) and the octane was 93...