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I am new to the group and my 2002 C34 MKII and am looking for feedback on if anyone with the same boat and engine has experienced reduced speed over ground at what seems to be very high RPM's for the M35. 

At 3,200 RPM with a clean bottom and calm seas I barley reach 5.1 knots.  For short periods I have accelerated RPM's (per the tachometer) to 4,300-  at this level the engine still seems to be operating smoothly- no smoke or excessive vibrations but speed will not get over 6 knots.

I am surprised it will go to that high RPMs and suspicious that the tachometer is off.

Any insights on this would be appreciated.  Also considering a new folding 3 blade prop and would like to know what has worked for other C34's.

Thanks

Bill

I am new to this forum and would like to know if anyone else has experienced reduced boat speed under power with the M35BC engine on my 2002 MKii.

With a clean bottom at 3,200 RPM I am barely able to get over 5.1 knots.  I have increased the RPM above 4,300 for short periods and the boat speed can get up around 6 knots.  No smoke or vibration at 4,300 RPM either.  I suspect I may have a problem with my tachometer as I did not think the RPM's would be able to go as high as they do.

I am considering replacing the original 2 blade fixed prop with a folding 3 blade with hopes it will drive the boat faster, however I want to figure out the RPM issue first.

Any insight or advice from others that may have had the same experience would be appreciated.  Also any comments on what brand and spec of folding prop others have gotten for the MKii...

Thanks!

Bill