I am told my Beta 25 can run up to 3600 but I reach hull speed at ~ 3200 so running it higher is pointless--the speed is fixed by the combination of rpm/transmission ratio/prop size/LWL. It is loud enough at 3200! Charlie Nelson S/V Water Phantom cenel...@aol.com
-----Original Message----- From: Chuck S via CnC-List <cnc-list@cnc-list.com> To: Edd Schillay <e...@schillay.com>; CNC boat owners, cnc-list <cnc-list@cnc-list.com> Sent: Tue, May 27, 2014 5:22 pm Subject: Re: Stus-List RPMs on Your Diesel Engine Hi Edd, I hear 2750 is the sweet spot for an engine w 3600 max RPM I just ran three days to get my boat from AC to Magothy River, Md. My M4-30 liked 2750 for the first day running at max, 195 degrees. Diesels like to run hot and run loaded. They start carboning up if they are loaded less than 30%. The second day, I had an overheat condition and had to stop and anchor and clean the heat exchanger. It was scaled up with many tubes plugged. I rodded it clear using wooden dowels I keep aboard. The flow improved but only 50%. I changed the impellor and flow was 30% better than when I launched. The old impellor looked fine, but the results were night and day, so I threw it away. After that, she ran cooler and liked more RPMs and we got closer to 3000PRM. 3600 is max. I monitor vibration and engine temperature to choose RPMs. We were pushing to catch tide changes to get up the Delaware and thru the C&C Canal. Chuck Resolute 1990 C&C 34R Atlantic City, NJ From: "CNC boat owners, cnc-list" <cnc-list@cnc-list.com> To: "CNC boat owners, cnc-list" <cnc-list@cnc-list.com> Sent: Tuesday, May 27, 2014 12:16:00 PM Subject: Stus-List RPMs on Your Diesel Engine 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 _______________________________________________ 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 _______________________________________________ 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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