Merc 420 to 525sc in a Formula 242.
#44
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Join Date: Oct 2011
Location: Philadelphia, Pa
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Oil therm , block bypass to therm housing, take valve out of thermostat , #10 lines,big coolers , transom water pick ups
New strainers, bravo pumps, keep block pressure 25 psi or less. Let er rip
New strainers, bravo pumps, keep block pressure 25 psi or less. Let er rip
#47
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#50
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Yup. I put new head gaskets in the motor 50hours ago. The motor looked good inside at that time. I only pulled the motor to switch to inconel valves. I wonder how long I had been running like that.