Thread: Fuel Question
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Old 06-03-2013, 03:44 PM
thatsmrmastercraft's Avatar
thatsmrmastercraft thatsmrmastercraft is offline
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Join Date: Sep 2008
Boat: 1977 Stars & Stripes
Location: St. Paul, MN
Posts: 17,252
At 9:1 compression and the timing advance these engines run, 87 should be just fine. That said, I run 89. Like Doug said, it's not much difference in price when filling a tank
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