I'm doing some long term fuel usage calculations on the Krogen 42. Problem is that I have engine use mixed with genset use, and would like to back out the genset use to get the actual engine fuel burn. Here are the numbers so far since last fill: Fuel burned: 320 gallons Engine hours: 149 Genset hours: 44 Nautical miles traveled: 960 Average engine RPM's: 1800 This gives, with combined engine/genset use: about 3 NM/Gallon and 2 gal/engine hr. burned. The actual engine only numbers will be different, but I have no idea how much fuel the genset burns by itself. The engine is a Lehman 135. TIA! Keith _____ Slogan of 105.9, the classic rock radio station in Chicago: "Of all the radio stations in Chicago...we're one of them."

between the genset and the main, the one you can probably estimate in the most accurate way is the genset. too many variables with the engine whether load, bottom conditions, etc... You should be able to get reasonably accurate number for the genset from wstbk... depends on load obvioulsy but at medium load, you can probably guesstimate 3/4 GPH. even if you're off by 25%, or 10 gallons in this case, it's not going to drastically affect the number for your main. depending on your fuel system, you can also run for a while, between fill ups, the genset on one tank and the main another one. that's what i did on my boat early on to check my estimates... pascal maimi, fl 70 hatteras 53my ----- Original Message ----- From: "Keith" <keith@anastasia3.com> To: "T&T List" <trawlers-and-trawlering@lists.samurai.com> Sent: Friday, July 21, 2006 8:16 AM Subject: T&T: 8KW Westerbeke fuel burn? > I'm doing some long term fuel usage calculations on the Krogen 42. Problem > is that I have engine use mixed with genset use, and would like to back > out > the genset use to get the actual engine fuel burn. Here are the numbers so > far since last fill: > > Fuel burned: 320 gallons > Engine hours: 149 > Genset hours: 44 > Nautical miles traveled: 960 > Average engine RPM's: 1800 > > This gives, with combined engine/genset use: about 3 NM/Gallon and 2 > gal/engine hr. burned. The actual engine only numbers will be different, > but > I have no idea how much fuel the genset burns by itself. The engine is a > Lehman 135. TIA! > > > Keith > _____ > Slogan of 105.9, the classic rock radio station in Chicago: "Of all the > radio stations in Chicago...we're one of them." > _______________________________________________ > http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering > > To unsubscribe send email to > trawlers-and-trawlering-request@lists.samurai.com with the word > UNSUBSCRIBE and nothing else in the subject or body of the message. > > Trawlers & Trawlering and T&T are trademarks of Water World > Productions. Unauthorized use is prohibited.

Westerbeke's manual quotes the rate of burn. When we lived on our trawler and did our 14,000 miles in 03-05 we had a 12kW Westebeke and I did the same calculations by using Westerbeke's published rate of 1.4GPH from their manual. In my calculations I dropped that to 1.25 to get actual engine consumption. (Was pleased to get 4.96gph at average 8.2kts out of our twin C 220s over the term. Chuck Wistar www.seleneannapolis.com www.celebratecruising.com -----Original Message----- From: Keith [mailto:keith@anastasia3.com] Sent: Friday, July 21, 2006 8:16 AM To: T&T List Subject: T&T: 8KW Westerbeke fuel burn? I'm doing some long term fuel usage calculations on the Krogen 42. Problem is that I have engine use mixed with genset use, and would like to back out the genset use to get the actual engine fuel burn. Here are the numbers so far since last fill: Fuel burned: 320 gallons Engine hours: 149 Genset hours: 44 Nautical miles traveled: 960 Average engine RPM's: 1800 This gives, with combined engine/genset use: about 3 NM/Gallon and 2 gal/engine hr. burned. The actual engine only numbers will be different, but I have no idea how much fuel the genset burns by itself. The engine is a Lehman 135. TIA! Keith _____ Slogan of 105.9, the classic rock radio station in Chicago: "Of all the radio stations in Chicago...we're one of them."