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  Fuel consumption: Outrage 25 with twin 150-HP Optimax Engines

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Author Topic:   Fuel consumption: Outrage 25 with twin 150-HP Optimax Engines
Ector posted 06-27-2004 06:41 PM ET (US)   Profile for Ector   Send Email to Ector  
I took my OUTRAGE 25 with its new 150-HP Mercury Optimax engines out today for a first ride. First performance observations below. I couldn't do more than this because of the bad sea conditions:

Props: Mercury LASER II 19-inch pitch with medium vent holes
Sea: quite high waves (3 to 5 feet ... sigh!)
GPS: Garmin 126 on board
Crew: 2 people on board
Fuel: about 80 gallons of gas

The boat was quick to get on plane. It was easily on plane also with an engine totally tilted up and only one engine running. The minimum plane speed about 20-knots at about 3000 RPM. In about 60 minutes at 24-knots average speeds (3300 RPM) we used about 30 litres of gas (less than 8 gallons)

A second trip with 7 people on board and about 70 gallons of gas: the boat was quick on plane; not tested with one motor tilted; minimum plane speed about 20-22-knots at 3300-3400 RPM; in about 80 minutes at 24 knot average speed (3600 RPM) we used about 70 litres of gas (18 gallons)

Hope to take more data next weekend. Tell me what do you think about this?

Ector

jimh posted 06-28-2004 07:35 AM ET (US)     Profile for jimh  Send Email to jimh     
With twin Optimax 150-HP engines we saw fuel economy in the range of 3 miles-per-gallon at cruising speed on a 2003 OUTRAGE 240, which is probably a heavier boat with a deeper vee hull.

If you have the Smartcraft gauge option you can get instantaneous readings of fuel consumption.

To convert your numbers to more familiar units:

60 minutes= 1 hour
24 nautical miles = 27.6 statute miles
30 liters = 7.75 gallons

MPG = 27.6/7.75 = 3.56

So you are reporting fuel economy of 3.5 MPG, which is in good agreement with the observation noted above.

Ector posted 06-28-2004 04:42 PM ET (US)     Profile for Ector  Send Email to Ector     
jimh .. thank you for editing the subject and the text...i hope my observations could be useful also if my english is quite poor....!

maybe the fuel consumption data (and the quality of the cruise: too much punching on the waves) could be better raising the engines one or two hole ... i think they are mounted too low on the stern (anticav plate is 1 inch under the water surface while cruising on plane and the spray is quite high)

So i'll take more data after raising them up...hoping it could be interesting for the forum.

Ector

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