I just bought a 24' baja h2x with a mercruiser 454. I'm just looking for a shelf cam that's mainly going to give it good sound. The engine is stock with an intercooled procharger. I like a nice lopey idle, but basically want a plug and play application so nothing too radical. I'd just like to be able to remove the old cam and install the new one without needing to change springs or anything. I think comp may have a line of marine cams but figured I'd ask to see what you guys have run with success....
thanks

If you get a cam that doesn't require new springs, it will be so close the stock that you won't see any gains.

I did exactly what you want to do with a Crane 241. I believe it'scalled a 242 in a kit with lifters. It's very close to the Merc 420 cam. The next upgrade I would do would be to change to a hydr roller cam.

If your running a procharger you really need to bulletproof your valvetrain. I suggest spending the extra bucks on a good rollercam kit(springs and all) and a good set of valves.

You will want a blower specific cam. A naturally asperated cam may hurt your performace with valve overlap. There is more performance to be had and there is differences in ICL, LSA, and Open/Close angles.

I just pulled a complete "731" cam, lifters,springs and retainers out my Pro charged Gen VI. I f yours is a roller motor I'll make you a heck of a deal on them. It sounded and ran awesome in my boat.

kennyo, what are the secs on that cam? I just repowered my boat and went small on the cam to keep the old lady from whining about the sound, but I am not happy and need a bigger bump

Check with RmBuilder give Bob a PM he can help you.

Punch in 168731 on the crane website. It will give you specific info. It's basically .587/.610 lift @ 226/236 dur.

Many exhaust systems won't support the cams that are being discused here. Big exhaust overlap leads to reversion, leads to exhaust valve heads wedged into the tops of pistons. If you have stock Merc manifolds or many of the aftermarket one's with short risers, reversion is going to be a big issue for you.

If you don't have good stainless valves at a minimum, cam is going to be the least of your worries. Blowers introduce alot more heat to the exhaust valve. Once it gets really warm, it'll start to tulip- and then you're screwed.