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MPG question
Ron Harr	#1  Posted on 07/28/09 - 6:28 PM
Member Personal Page Posts: 13 Comments: 1 Joined: 12/11/08	I'm concerned that my Whaler 15 Super Sport with Evinrude 70 (SS prop) is not as efficient as it used to be. Does anyone have an estimate of the fuel economy for this combination in miles per gallon? I know there are lots of other variables, but I'm looking for a ballpark figure. Thanks you! Ron
Tom W Clark	#2  Posted on 07/28/09 - 7:14 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	5-6 MPG
HarleyFXDL	#3  Posted on 12/22/09 - 4:56 PM
Member Personal Page Project Albums Posts: 917 Comments: 30 Joined: 07/24/07	Try to remember Ron, it is a carb 2-stroke. It should'nt be too bad as it is a small 3 cyl. I would go with Tom's estimate. Kevin 1988 11' Super Sport, 1987 Johnson 15hp. If you think education is expensive, try ignorance "Vegetarian - old Indian word for bad fisherman."
CES	#4  Posted on 12/22/09 - 7:59 PM
Member Personal Page Photo Albums Project Albums Posts: 2681 Comments: 7 Joined: 04/27/07	My 40 hp, 3cyl, 3 carb 2-stroke doesn't do much better than Toms estimates too. Cliff 1966 13' Sport with a 1993 40hp Yamaha 2 Smoker
number9	#5  Posted on 12/22/09 - 11:56 PM
Member Posts: 210 Comments: 1 Joined: 03/13/08	Ron, Is "not as efficient as it used to be" compared to the SS configuration? Possibly you're more comfortable and running faster. Bill...On the Ogeechee 1984 Outrage 18...Yamaha T50...that's right, 50hp
DWinter	#6  Posted on 01/02/10 - 4:08 AM
Member Personal Page Posts: 252 Comments: 0 Joined: 01/02/10	Estimate is right on at WOT. Dropping rpm to 4000 or so can reduce consumption as much as half depending on how you load and trim the boat out after planing.
Whaler27	#7  Posted on 01/02/10 - 5:07 AM
Member Personal Page Posts: 32 Comments: 1 Joined: 10/11/06	At a moderate cruising speed of 25 to 28 MPH, (~4000 RPM, 4 GPH) you should be able to get better than 6 MPG. Overall, an average of 5 MPG for all speeds is typical.