Captain Al wrote: "The engines are running beautiful and quiet and burning less than 5 gallons/hour total with a cruising speed of about 9 knots at about 1500 rpm. I'm swinging 26x24" wheels though 2 and a half to one reduction gears. ********************* A good friend with twin Cummins 220's, Mr. Colin Lo, just completed a 6 1/2 day straight run from Manila to Singapore. Because his crew had to get back to Hong Kong for the China Sea sailboat race they made a fast passage at 8.75+ knots. 1400 NM total using about 2200 liters (580 gallons) of their 3113 liter (822 gallons) capacity. This is about 3.6 gallons per hour. Props are 3 blade 27 x 18; 2:1 ratio. He didn't report the RPM but I estimate about 1600. Colin is not a TWL listree but I'm sure he would answer any questions about his experience with Cummins. colin@phuket.ksc.co.th He is continuing his trip to Thailand now. Bill & Stella Kimley Seahorse Marine, Zhuhai, China Tel & Fax: (86) 756-550-2145 Back-up Fax: 756-333-5901 zhyachts@pub.zhuhai.gd.cn -----Original Message----- From: Captain Al Pilvinis <yourcaptain@earthlink.net> To: Bob & Barbara Kassal <bkboater@delanet.com> Date: Wednesday, April 19, 2000 10:03 AM Subject: TWL: Cummins engine performance Hi Bob: These engines are doing almost identical to the 200 HP Perkins Turbo'd 6 cylinders, that I replaced. According the the manufacturer I can run them at low rpm and they will probably last forever. They do recommend to periodically run them at high rpm so the connecting rods will be extended and remove any ridge that I might be wearing into the cylinder walls. Also it is good to get the carbon off the turbo blades. So far I have not found any carbon or smoking when I open it up. Good luck with your new boat. .Pilvinis "M/V Driftwood"--Prairie 47 2630 N.E. 41st Street Lighthouse Point, Fl 33064-8064 Voice 954-941-2556 Fax 954 788-2666 Email - CaptainAl@Juno.com Website http://home.earthlink.net/~yourcaptain