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Wes Burmark

03-03-2013 09:30 PM

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...

Powerquest_Baby!!

03-03-2013 09:50 PM

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.

Griff

03-04-2013 02:23 AM

800-1200 or maybe even more.

mike tkach

03-04-2013 08:44 AM

Quote:

Originally Posted by Griff (Post 3878836)

800-1200 or maybe even more.

i agree,the 496 in stock configuration is a dependable engine,but not one i would ever conceder supercharging.

Pismo10

03-06-2013 12:47 PM

I agree, at least 1000 hours.

paul buckner

03-06-2013 02:32 PM

Quote:

Originally Posted by Pismo10 (Post 3880617)

I agree, at least 1000 hours.

LUVLY , 850 HOURS TO GO THEN :evilb:

288sunny

03-06-2013 03:15 PM

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..

MER Performance

03-06-2013 04:04 PM

Quote:

Originally Posted by 288sunny (Post 3880689)

Did the valve springs fail first?

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