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Fuel Consumption: Merc 496HO vs. Merc 525

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Old 10-23-2007, 09:41 AM
  #21
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Just for the record, I'd get the 525 without a doubt.
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Old 10-23-2007, 09:48 AM
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A salesman once said and I quote..
If you have to ask the fuel consumption of the bigger motor you can't afford the gas to put in it...lol
in my case..
I just made the wife get a second job...
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Old 10-23-2007, 12:37 PM
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I have run my boat with both a 496HO/X/labbed B25" and the current 525/XR labbed B28", and IŽd swear that at cruise speeds the 525 uses no more gas than the 496 was, but when I use the 12+ mph extra top speed, things look different.

I log an average of around 15 gals/hour, and I get places alot faster than before!

I have a Smartcraft Monitor in front of the passenger. The momentary fuel consumption figure almost impresses more than the GPS speedo............
And yes, the 525 is worth every dollar!
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Old 10-23-2007, 03:19 PM
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It isn't about money. I want to keep the range up. I want to make fuel the last issues in any trip, meaning running out quickly.

I have no idea what my Freightliner gets for MPG, all I know is that is holds about 130 gallons and I can go pretty dang far on full tanks.

I have an idea of how far I can go in my boat with the 496s, just wnated to know how much that would be affected.

I would be taking my 60 hours 496 HOs out of my boat and putting in brand new 525s.

Thanks for the response so far.
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Old 10-23-2007, 03:31 PM
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What's the labor involved in the motor swap? Plug and play?
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Old 10-24-2007, 04:26 AM
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Quote:
Originally Posted by Wild Card 09 View Post
I log an average of around 15 gals/hour, and I get places alot faster than before!

I have a Smartcraft Monitor in front of the passenger.
Do you know the fuel consumption (in litres/hour or gallons/hour) of the 525 EFI at idle, 3000 RPM and WOT ?
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Old 10-24-2007, 12:45 PM
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Quote:
Originally Posted by Sydwayz View Post
A 37AT with 525EFIs/XRs/32p B1s gets a right around 1.5 MPG AVERAGE over the entire RPM range on same trip.
I wish!

But, if fuel ecomony was a major factor I would have opted to go with another pair of HO's.

Glad I didn't!
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Old 10-24-2007, 01:29 PM
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Quote:
Originally Posted by Macklin View Post
I wish!

But, if fuel economy was a major factor I would have opted to go with another pair of HO's.

Glad I didn't!
Macklin, I can't help it if you keep your sticks bent over the dash!

My numbers above came from the 300 mile roundtrip that Rich, myself, and about 10 other boats did a couple summers ago from Coles Point to Baltimore (with stops in Solomon's, Island, Kent Island, and St. Michael) over 4 days. Again, it was easy cruising with a few fast jaunts.
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Old 10-24-2007, 06:05 PM
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Quote:
Originally Posted by Phazar454Mag View Post
Do you know the fuel consumption (in litres/hour or gallons/hour) of the 525 EFI at idle, 3000 RPM and WOT ?
Idling out from the dock, it is around 8 -12 litres per hour, at 3000 it goes up to 40 litres per hour, and at WOT there is about 160 going through per hour!
The Smartcraft readout is very accurate. When I recently tanked up full, the gauge indicated 270 litres had been used. 274 litres went in when I brimmed the tank!
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