26sonic

3 0f the same boat (year make and model) all have same options with full fuel , one has 496 ho's(425hp(75mph gps) one has 500efi's(470hp) (80mph gps) one has 525 efi's (525hp)( 85mph gps) seems to me that if installing the cmi exhaust for the 496 engines @ 55 claimed hp per side I should be able to hit the 80mph gps like the boat equiped with the 500efi's ?

Sean H

is the 496HO 425 at the prop like the 470 you are stating for the 500? i would guess that the 500efi would out pull the 496 with headers with the same prop and gear ratio....

beachbob

This is exactly what I was thinking<< >> I was also told that headers will not void the mercruiser warranty? (not sure i beleive it ?) Could take them back off?? But that wouldn't be right? Sounds like 496 HO way to go if you want a real warranty and then can always upgrade for more speed later.. (Is my conclusion) for whats it worth.. Change me mind way to much

Sean H

don't the 496HO and 525 both come with one year warranty's?

beachbob

No way go to mecury marine you can get up too 6 years total on the 496ho if its a mercury approved dealer something like that... I been driving the dealers crazy with all me questions Tuff to get a straight answer But I'm working on it..anyone know for sure chime in...I'm going off hearsay and mercury marines sight which is tuff to interpert!!

Sean H

i am talking standard warranty, you can buy that mercury guard or whatever, but some of the guys on here have had a hard time getting stuff fixed.... but standard warranty is one year for both engines... and no way a 496HO with headers is gonna pull the same gear/prop as a 525 does (usually 535-540 HP)..

beachbob

K now I'm thourougly confused I;m gonna start a thread on warranty's
http://www.offshoreonly.com/forums/s...d.php?t=119973