bcfountain

is 325hrs alot for a 525sc?the motor is a 96.i am looking at boats and this is one of the motors in one of the boats,35ft.do these motors have issues like the hp500,like the valve springs.are they any harder on fuel as comparied to the 502mag?correct me if i am wrong,the 525sc is 485@prop,454 block,square port heads,250ci blower,850 dbl pump carb.headers w/ss risers.thanks for any input.

Griff

525SC is a 454 with a 177 blower and 1050 Dominator carb and Gil exhaust except the last couple years had CMI headers. 490 HP at the prop. Yes, the are quite a bit thirstier than a 502mag. They are very good engines. They do need 92 octane fuel.
325hrs???? It really depends on how it was maintained. It could be fine and could need some work. Salt or Fresh water??? The intakes do not like salt and they are very hard to find used. They don't break springs like the 500HP, but they may start to get weaker pressures.

For a lot more info, use the advanced search. Search my screen name and 525SC as the keyword.

ezstriper

have a friend of mine that has a pair with over 600 hrs, just had a blower let go, had that redone and changed the valve springs, runs great....

bcfountain

thanks griff and ezstriper,i knew you guys would chime in.the boat that i was looking at w/the 525,s was sold.it looks like its hp500,s.the boat is a 35ft fountain,96 yr.other than the fact that you have to change the valve springs @around 300hrs,what other qurks do they have.i have always heard they were pretty bullet-proof.

Griff

Nothing else to really be concerned with on the carbed HP500's other than the springs. They should be changed in the 200-250hr range.