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Old 07-01-2007 | 12:54 PM
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fountainguy214
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Can someone please give me a hint of what spark plaugs should be run in a merc 600 sc?????????
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Old 07-01-2007 | 05:11 PM
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Probably an AC MR41T or equivalent.
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Old 07-01-2007 | 07:05 PM
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Originally Posted by Griff
Probably an AC MR41T or equivalent.
thats pretty cold, I run the 42ts in mine at 860 hp.

I would like to know what they put in them?
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Old 07-01-2007 | 10:40 PM
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The AC MR41T's are the stock plug for the 525SC. I ran NGK UR5's in my 525SC. They are extended tip plugs in the same heat range as the AC 41's.

I think the plugs are the same for the 600SC. I don't have my Merc HP Manual anymore to check. I gave it to DudeSweet when he bought my boat.
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