How do I get 300+HP from Merc350/260?
 

I'm not sure how I would search but if there are posts on this topic, feel free to redirect me. I'm a newbie trying to learn.

If it was time to refresh stock 260hp Mercs, what different parts do I need to get 300hp out of them? I assume different cam, but is there a different head/intake/carb/ignition setup? Or is just upgrading to the Vortec stuff the way to go?

No, I wouldn't be doing the work myself, but while they were apart I figure it should only be a (relatively) small extra cost to get the better parts during the rebuild instead of buying complete new motors?

Thanks for any insight,
Michael

Re: How do I get 300+HP from Merc350/260?
 

Cam, intake, carb, some mild head work and exhaust to prevent reversion.

Other than probably the cam, all the rest would be an addl expense, prob an addl 3k per engine.