Yanmar 3HM35F 30hp @3200 rpm continuous. 3400rpm for 1hour. 3600rpm max. My manual says to avoid extended operation at high vibation rpm. The Idle/shift/minimum rpm spec is 800. The Kanzaki transmission is required to be shifted less than 1000rpm.
I push it as hard and fast as I can while watching and smelling for black smoke. The rpm by analog tach is usually 2500-2800 but by laser-tach it usually adds about 200-400rpm. Boat speed is between 6.0-7.5kts. The throttle lever slips a little so after extended operation the rpms creep down and I'll have to re-throttle up. I don't worry about fuel consumption since I don't use my 40 gallon tank fast enough anyway. I hate running the engine but the noise is basically the same regardless of rpm. I also use a great product called Opti-lube XPD. I strongly recommend it. It is marketed to restore the lubricity that has been lost by ultra low sulfer diesel (ULSD). My expierience is that the engine runs smoother, min idles a little higher and smoother, and can attain a higher rpm before black smoke. My understanding with ALL diesels is that you want to run the engine near full rpm and load as often as possible and the prop should be pitched accordingly. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Yanmar 3HM35F Solomons, MD On May 27, 2014 12:16 PM, "Edd Schillay via CnC-List" < cnc-list@cnc-list.com> wrote: > Listers, > > Curious to know what you set as your own personal Max RPMs on your diesel > engine? The Enterprise has an Universal M35. > > I used to stay around 2300, but people tell me diesels like to be worked > and I could go higher. My mechanic said don't be afraid to go 2500 or more, > but I wonder if he's just looking for more repair income :-) > > How much do you push your engine? > > > All the best, > > Edd > > > Edd M. Schillay > Starship Enterprise > C&C 37+ | Sail No: NCC-1701-B > City Island, NY > Starship Enterprise's Captain's Log <http://enterpriseb.blogspot.com/> > > > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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