How many hours is considered "high mileage''?
05-15-2007, 03:26 PM
#11
Registered
05-15-2007, 03:57 PM
#12
you can call www.marineassault.net aka www.moritzmachine.com in tulsa to get a rebuild quote.
05-15-2007, 04:13 PM
#13
Platinum Member
Platinum Member
It's tough to say.
The number I hear thrown around as a 'rule of thumb' on most stock motors is a life expectancy of about 1000 hours - well maintained, of course. 700 is getting up there, as is the age.
700 hours on a motor 3 years old verses 700 hours on a motor 14 years old also makes a huge difference. I honestly wouldn't expect them to last much longer before a rebuild is necessary.
But having said that, I know of a guy who owns a commercial boat with a pair of 496's who has turned 2000. However, they're only 2 years old.
The number I hear thrown around as a 'rule of thumb' on most stock motors is a life expectancy of about 1000 hours - well maintained, of course. 700 is getting up there, as is the age.
700 hours on a motor 3 years old verses 700 hours on a motor 14 years old also makes a huge difference. I honestly wouldn't expect them to last much longer before a rebuild is necessary.
But having said that, I know of a guy who owns a commercial boat with a pair of 496's who has turned 2000. However, they're only 2 years old.
"It still has some in it, till it don blowed up yahh know..."
05-15-2007, 05:54 PM
#14
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Location: St.Peters,Mo/5mm LOTO/LEOPA
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my 502's show almost 700 hours and i know the hour meter has been replaced i have put 400 on it and it is almost all at wide open throttle and they are perfect , use no oil and have 60 pounds of oil pressure. but i am a maintence freek
05-15-2007, 07:19 PM
#15
use marineassult in Tulsa. He did my 502 and I am extrememly happy with the work done and the price. You should at least plan on a top end rebuild. The springs and valves have got to be tired after 700 hours.
05-15-2007, 07:29 PM
#17
Registered
VIP Member
Most people can relate easier to mileage, so somebody figured out that every 200 hours relates to about 15,000 miles on your car. I heard this many years ago from a Mercruiser rep and nobody's ever told me it was way off.
I would think that there are many variables that would affect these numbers.
I would think that there are many variables that would affect these numbers.
05-15-2007, 09:13 PM
#19
OSO Moderator
Charter Member
I have 40 hours on my truck and the odometer says approx 10,000.
700 hours, depends on how well maintained, I'd not be afraid of them, but would also expect a rebuild soon, as you never know how the previous owner REALLY operated the boat.
Expect a full rebuild by a reputable builder to be $7,500ish per motor.
700 hours, depends on how well maintained, I'd not be afraid of them, but would also expect a rebuild soon, as you never know how the previous owner REALLY operated the boat.
Expect a full rebuild by a reputable builder to be $7,500ish per motor.
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BillR
'00 Scarab Sport 302 CC
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BillR
'00 Scarab Sport 302 CC
'02 Cigarette Top Gun TS
'02 PQ 340
'00 PQ 280
'98 Scarab 22
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
05-15-2007, 09:17 PM
#20
