unfortunately I don't got a rib, but I visited this site much when I had a Sib. I bought a little (4.10M) Hoga Rodd console boat with a suzuki DF15. The set is from 99, but looks like its new! It also got a RPM meter, original from suzuki. But now the problem:
I got the idea that the RPM meter dont show the right RPM. it shows a max from 2800RPM. Im now not sure if it is the engine who runs slow(dont got any comparison, or people arround with a knowledge/boat) or the meter who shows about the half of the true RPM.
I got a movie when sailing at full speed, maybe you people could hear if this is more than 3000RPM?