I usually don't get a chance to read the tech section very often, so please excuse me if this has been asked before.

Does anyone know the cam specs and part number of the 1998 Mercury Racing HP500 carb motor??
How about the valve spring sepcs and part numbers?
Is there now a better replacement spring for the HP500?
Thanks !!!

Check this out.

http://www.offshoreonly.com/forums/s...threadid=73706

Regarding the springs, I would definitly go with Isky.

I have two sets of Comp 961 springs as recommended by Teague that I am not going to use. New Teague price less 25%. Also am selling retainers, locks and seals, all new from Teague.

Shawn

Gordo
Specs for 500 HP
hyd-roller Crane 284/292 .576/.598
Merc #2409-848906A1
Here is the timing card for the 169611
http://dab7.cranecams.com/SpecCard/...B1=Display+Card

How about the valve spring sepcs and part numbers?
#99896
Outer Diameter Outer 1.540
Outer Diameter Inner 1.140
Inner Diameter Inner .760
Damper YES
Seat Pressure @ Installed Height 132# @ 1.906
Open Pressure and Height 414# @ 1.306
Coil Bind 1.085
Average Spring Rate 470 #/IN
Is there now a better replacement spring for the HP500?
There are options that provide increased durability and performance
Bob

Thanks for the responses.
RMBuilder, Great info. Just what I needed.
Shawn, please e-mail me your contact info to;
[email protected]

Thanks again for everyones help.

Bob,
Do you have a particular brand/part number in mind?

If anyone needs the springs described above, they are $350 for everything and I will UPS to you in the US.

Shawn