|Topic Review (Newest First)|
|12-25-2011 11:46 AM|
Originally Posted by LakeSuperiorGeezer View Post
|12-25-2011 11:07 AM|
Lean running engine
Originally Posted by SkywalkerII View Post
|12-25-2011 07:46 AM|
|SkywalkerII||Moyer Marine sent out an email not long ago about a nice little upgrade for our beloved Atomic 4s. How about a new carburetor jet that reduces fuel consumption to 1/2 to 2/3 a gallon per hour! I haven't had the chance to follow up on this yet, but I'm looking forward to it.|
|12-24-2011 10:29 PM|
32' boat w/a 4ft draft full keel 10' beem 35 hp. kubota 4cyl w/ a hurth 125 2.73to1 ratio w/ a 19r11 three blade prop. gross weight 13-14000# burning less than 1/2 gal. an hour on flat water.
I think there are alot of factors that will influence the amount of fuel usage beyond just the engine size and operating speed.
even the "freshness " of the bottom job would effect it.
|12-24-2011 05:17 PM|
|JimsCAL||I agree that Boasun's SFC estimate of 0.6 lb/hp-hr is a bit high. I would estimate something like 0.45 to 0.50 is closer. But the big thing to keep in mind is that you are typically running at FAR less than rated power. Power requirements vary approximately with the cube for a displacement hull. So reduce the speed by 20% and you cut the power (and fuel consumption) by half (0.8x0.8x0.8=0.512).|
|12-24-2011 02:59 PM|
|addict||My fuel gauge is an old batten. I normally watch my hours and start checking around 20-25 hours which is about half a tank. My old 2gm burns around 1.25-1.3 liters per hour @ 2400-2600 rpm.|
|12-24-2011 02:36 PM|
I use a dipstick, with a volume conversion chart.
I don't have a fuel guage.
|12-23-2011 06:15 AM|
I run my A4 at 1500 RPM as it just stuffs the stern at more RPM to go a tiny bit faster while i have not done exact it is way under 1 GPH
To go from 5.5 to 6.5 knots most likely doubles the fuel burn as thats the point were it stuffs the stern with a 24' W/L
|12-23-2011 12:14 AM|
|jrd22||We have a fuel gauge that reads for both tanks and both tanks have sight tubes (I use these more often than the gauge) and I track all fuel and hours just because I'm anal about not running out of fuel (tanks hold 190 US gal), which will probably guarantee that I'll run out at some point:-)) Our old Volvo 62 hp consistently burns 1 gph at 2500 rpm which is a little over 6 knots through the water when calm. Wide open I"m sure it would use 3-4 gph.|
|12-22-2011 11:18 PM|
Originally Posted by travlineasy View Post
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