engine rotation

[1fastlx]

I am new to twin engine boats. I have recently bought a 26' wellcraft with twin 350s. The engines have been replaced and the drives have been reworked. My question is are both props supposed to turn in the same direction or has someone done something wrong? I was looking at new props and most sets I have been seeing are RH and LH. What advantage/disadvantage does the rotation have on performance and economy? The boat runs and handles well but speed suffers compared to the other boats with the same setup.

[GN107]

I would recomend leaving the engines in there currant rotation. Too much to change to turn one engine around. Plumbing, Mounts, bell housings, drives, props, the list goes on and on. Work with the propellers. I think that is where you will see your biggest gain.