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#1
posted to rec.boats
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'Cruising' Sweet Spot
It was too rough on the Bay Saturday for me to want to extend the "testing" to the higher RPM ranges, but I did note that the apparent sweet spot for my little Parker and its Yamaha F150 is 4000 RPM. At that engine speed, with three guys aboard, plus 75 gallons of fuel (3/4 tank), fishing gear, three batteries, cooler full of ice, et cetera, the GPS and the boat speedo agreed we were doing 27 mph and the fuel management meter said we were getting precisely 4.5 mpg. I don't know whether that is good, bad, or indifferent; it just is. On a different day but with a similar load, we saw 41+ mph at 6000 rpm. I don't recall either the the *exact* gph or mpg at that speed, but it was typical for a 150 hp engine...using the one gph per 10 hp "formula." There's really no need to run at that speed, so I rarely do. My Parker is relatively heavy for its length (2850 pounds, sans engine, fuel and gear), and has 21 degrees of deadrise at the transom, so comparisons with lighter boats with flatter bottoms aren't too relevant. |
#2
posted to rec.boats
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'Cruising' Sweet Spot
"HK" wrote in message ... It was too rough on the Bay Saturday for me to want to extend the "testing" to the higher RPM ranges, but I did note that the apparent sweet spot for my little Parker and its Yamaha F150 is 4000 RPM. At that engine speed, with three guys aboard, plus 75 gallons of fuel (3/4 tank), fishing gear, three batteries, cooler full of ice, et cetera, the GPS and the boat speedo agreed we were doing 27 mph and the fuel management meter said we were getting precisely 4.5 mpg. I don't know whether that is good, bad, or indifferent; it just is. On a different day but with a similar load, we saw 41+ mph at 6000 rpm. I don't recall either the the *exact* gph or mpg at that speed, but it was typical for a 150 hp engine...using the one gph per 10 hp "formula." There's really no need to run at that speed, so I rarely do. My Parker is relatively heavy for its length (2850 pounds, sans engine, fuel and gear), and has 21 degrees of deadrise at the transom, so comparisons with lighter boats with flatter bottoms aren't too relevant. Ahhh, 3 on board. A stooges reunion perhaps? |
#3
posted to rec.boats
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'Cruising' Sweet Spot
HK wrote in news:6f5pbqF9bproU1
@mid.individual.net: GPS and the boat speedo agreed we were doing 27 mph and the fuel management meter said we were getting precisely 4.5 mpg. Pretty close to what boattest got on this Ranger with that motor: http://www.boattest.com/oem/general-...484#TestResult Their peak planed was 3500 RPM...5 mpg...as soon as it planed and quit plowing... |
#4
posted to rec.boats
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'Cruising' Sweet Spot
HK wrote in news:6f5pbqF9bproU1
@mid.individual.net: On a different day but with a similar load, we saw 41+ mph at 6000 rpm. I don't recall either the the *exact* gph or mpg at that speed, but it was typical for a 150 hp engine...using the one gph per 10 hp "formula." There's really no need to run at that speed, so I rarely do. http://www.boattest.com/oem/general-...484#TestResult Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; |
#5
posted to rec.boats
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'Cruising' Sweet Spot
Larry wrote:
HK wrote in news:6f5pbqF9bproU1 @mid.individual.net: On a different day but with a similar load, we saw 41+ mph at 6000 rpm. I don't recall either the the *exact* gph or mpg at that speed, but it was typical for a 150 hp engine...using the one gph per 10 hp "formula." There's really no need to run at that speed, so I rarely do. http://www.boattest.com/oem/general-...484#TestResult Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; Saw another twin-engined high-speed center console for sale at the marina Sunday...500 horsepower. Crikey. |
#6
posted to rec.boats
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'Cruising' Sweet Spot
On Mon, 28 Jul 2008 10:00:10 -0400, HK wrote:
http://www.boattest.com/oem/general-...484#TestResult Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; Saw another twin-engined high-speed center console for sale at the marina Sunday...500 horsepower. Crikey. They are dime a dozen here in Florida, almost standard equipment for serious open boat fishing. There are quite a few triples running around also, and even a few quads. One of the local quads is run by US Customs and Border Patrol - our tax payer dollars at work. :-) http://img186.imageshack.us/img186/232/p4290099lh8.jpg |
#7
posted to rec.boats
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'Cruising' Sweet Spot
Wayne.B wrote:
On Mon, 28 Jul 2008 10:00:10 -0400, HK wrote: http://www.boattest.com/oem/general-...484#TestResult Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; Saw another twin-engined high-speed center console for sale at the marina Sunday...500 horsepower. Crikey. They are dime a dozen here in Florida, almost standard equipment for serious open boat fishing. There are quite a few triples running around also, and even a few quads. One of the local quads is run by US Customs and Border Patrol - our tax payer dollars at work. :-) http://img186.imageshack.us/img186/232/p4290099lh8.jpg Yeah, I have seen a couple of "trips" around here, too. Haven't seen a "quad" yet, though. A goodly number of multi-engined center consoles around here are up for sale, more at one time than I have seen before. I'm sure it is all fuel-cost related. |
#8
posted to rec.boats
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'Cruising' Sweet Spot
On Jul 28, 10:58*am, Wayne.B wrote:
On Mon, 28 Jul 2008 10:00:10 -0400, HK wrote: http://www.boattest.com/oem/general-..._id=484#TestRe... Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; Saw another twin-engined high-speed center console for sale at the marina Sunday...500 horsepower. Crikey. They are dime a dozen here in Florida, almost standard equipment for serious open boat fishing. *There are quite a few triples running around also, and even a few quads. *One of the local quads is run by US Customs and Border Patrol - our tax payer dollars at work. * :-) http://img186.imageshack.us/img186/232/p4290099lh8.jpg What an awkward looking setup... plain ugly if you ask me. |
#9
posted to rec.boats
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'Cruising' Sweet Spot
On Jul 28, 11:52*am, wrote:
On Jul 28, 10:58*am, Wayne.B wrote: On Mon, 28 Jul 2008 10:00:10 -0400, HK wrote: http://www.boattest.com/oem/general-..._id=484#TestRe... Wide open it guzzles 14.7 gph x $4.5/gallon at the marina = $66/hour I wouldn't run it wide open, either...(c; Saw another twin-engined high-speed center console for sale at the marina Sunday...500 horsepower. Crikey. They are dime a dozen here in Florida, almost standard equipment for serious open boat fishing. *There are quite a few triples running around also, and even a few quads. *One of the local quads is run by US Customs and Border Patrol - our tax payer dollars at work. * :-) http://img186.imageshack.us/img186/232/p4290099lh8.jpg What an awkward looking setup... *plain ugly if you ask me.- Hide quoted text - - Show quoted text - You've got three times the chance of something going wrong with those hi-tech things..... Let alone keeping things syncronized and equally trimmed. |
#10
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'Cruising' Sweet Spot
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