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Forum: General Q & A

10-17-2005, 08:37 PM

Replies: 15

Help with piston meltdown at 9 hours 454 sc

Views: 5,144

Posted By Wilks

Re: Help with piston meltdown at 9 hours 454 sc

My holley 750 carbs are set up with 78 pri and 86 sec with 4.5 power valve in primary. This is about identical to the older merc 600sc. I am running the 155193 pulley which gives me 6 lbs of boost....

Forum: General Q & A

10-16-2005, 01:48 PM

Replies: 15

Help with piston meltdown at 9 hours 454 sc

Views: 5,144

Posted By Wilks

Re: Help with piston meltdown at 9 hours 454 sc

I have close to the same set-up with 100 hrs on them. What size jets in the carbs, what power valves, how big is the fuel line, what upper pulley p/n on the blower, what camshaft, what spark plugs....

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