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-   -   500hp Valve Springs ???? (https://www.offshoreonly.com/forums/general-q/66507-500hp-valve-springs.html)

Cigarette 30 12-26-2003 10:08 PM

rmBuilder,

Twin 500 E.F.I.s, year 2000, 160 hrs. TRUE usage as follows: 20% at idle, 70% at 2800/3000, 10% over 3000. I have second guessed my decision to the "Blue motors", over the 496 h.o.s, with the issues regarding the heads. Just don't seem to hear the problems with the stock motors, and in that I cruise, not race or poker run, what would you recommend on the next Cig.

splashandburn 12-27-2003 11:16 PM


Originally posted by splashandburn
Once you've made the changeout on springs do you have to do this every 200 hours or do the aftermarket spring hold up better for more hours??
========================================
Any opinions??

shawn 01-02-2004 10:51 AM

Is there a list of part numbers and description of the parts, tools and preferred vendor available?

Is there a board member who sells these repair parts and removal tool as a kit?


Spring P/N XXXXXXXX JEGS
Retainer P/N XXXXXXXX Summit
Lock
etc
etc
etc


Thanks

Shawn

splashandburn 01-05-2004 03:20 PM

Anyone know what year (if at all) Merc chaged their springs and do you still need to do the 200 hour changeout at 200 hours with them?

splashandburn 01-07-2004 10:26 PM

Does anyone know - has Merc changed the springs that they use now as stock and if so when did they do so? If you have the new springs do they still need to be changed at the 200 hour mark or are they now saying that they are good for more hours??

boatnick 01-09-2004 08:39 PM

Splashandburn,
I don't know for sure but I was told by my mechanic that the springs were changed in 1998. I would imagine that at 200 hours, it would still be a maintenance issue no matter what springs you have.

Good luck


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