496 HO 425 h.p. hours
03-03-2013, 09:30 PM
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496 HO 425 h.p. hours
Assuming good oil and care, about how many hours could you expect a 496 425 h.p. engine to last if most of the hours were in the 3000-4000 r.p.m. range? Let's say a 35' stepped hull with twin engines and Bravo drives...
03-03-2013, 09:50 PM
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I have a friend who has a 2002 Nordic Heat with the 496 mag ho 425hp....So far he has 850 hours and the motor runs like a top! Its all original too--nothing has been done to it.
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03-04-2013, 08:44 AM
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03-06-2013, 03:15 PM
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350 HRS = head job
Lost 2 intake valves and 2 exhaust valves 
Luck of the draw I'm guessing, mine was either a monday or friday motor. always ran synthetic 20W-50 oil, wix oil filter, change oil every 20-30 hrs. always had good oil pressure, motor never got over heated..
Luck of the draw I'm guessing, mine was either a monday or friday motor. always ran synthetic 20W-50 oil, wix oil filter, change oil every 20-30 hrs. always had good oil pressure, motor never got over heated..
03-06-2013, 04:04 PM
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Did the valve springs fail first?
