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Post by lg260ss on Jul 8, 2019 18:19:25 GMT -5
I am now at about 34 hrs on my 2019 33 express and I am seeing the following fuel numbers:
Average fuel burn rate: 9 G/hr Average Fuel Economy: 1.3 MPG Fuel economy at cruise: 1.3=1.4 MPG (3900-4100rpm, 26-29MPH) (19-20 GPH)
I am pretty impressed with the numbers I am seeing.
Engines are Volvo Gen V 300's (5.3l). WOT RPM is 5800, so I am cruising at 65-70% throttle.
Also, I am cruising with the drive trim in all the way at -5 and tabs up and only adjusted to correct a list or uneven load. If I adjust the drive trim up (even just a little) or use deploy the tabs the speed drops and the fuel economy drops.
What are other 32/33 Express owners seeing for fuel numbers. and how do you run your drive trim or tabs?
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Post by Av8ator1 on Jul 8, 2019 20:12:59 GMT -5
That’s the beauty of those gen5s.
On my 200 horse, at 3500 rpm, I get 25mph on 5.5 gallons per hour.
I haven’t seen numbers like this since I had my 200 horse optimax.
I absolutely love the gen5s, Volvo did it right on these babies.
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Post by sgilbert on Jul 8, 2019 20:18:14 GMT -5
Although I've got a much smaller Regal, I get about 1.5MPG @ 3600 rpm's. with twins (WOT is 4600)
I'd say, you are getting great fuel use.
Your tabs should always be all the way up at cruise, and drives all the way down.
That being said, you will need tabs to correct list.
I great way to keep level is to install a Bennett ATC (Automatic Trim Control) I find it indispensable!
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Post by ME2660 on Jul 12, 2019 11:22:50 GMT -5
sgilbert
I also have a 2001 Regal 2660 Commodore w/twin Merc 4.3L Carb. When I cruise I have my Bennett trim tabs all the way up, but I bring my drives up (about 3 to 5 degrees). The engine revs will drop and the speed will increase, trim to high and of coarse it gravitates. Then I will adjust port side Bennett tab to level due to slight list with full water tank. This is were I get my best fuel economy. I'm curious if this is normal or if my drives are not set properly?
Thanks
Mark
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Post by sgilbert on Jul 12, 2019 13:36:37 GMT -5
Well, Mark, I cannot comment, as I have no others to compare it to--other than yours.
I also have the 4.3 carbed Mercs. I also have a (now discontinued) Navman GPS with the fuel flow meters. I get no mpg or speed benefit by raising the ODs slightly.
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Post by Ella28 on Jul 16, 2019 9:39:09 GMT -5
Those are some impressive fuel burn numbers! 19-20 GPH at 26-29 MPH! On our 28 Express at 26-28 MPH we burn about 14-15 GPH. Helps get rid of the excuse of "the bigger boat burns a lot more fuel"!!! Calling my wife now...
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Post by wind954 on Feb 25, 2020 20:07:04 GMT -5
Are there any fuel burn report on the 33XO compared to the 33 Express with IO?
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Post by tc33obx on Mar 10, 2020 14:00:19 GMT -5
Are there any fuel burn report on the 33XO compared to the 33 Express with IO? Here is a link to the BoatTest on the 33XO. they are Regals numbers but they say 1.3 MPG at 4000 RPM. I've been looking at the 33 outboard models to figure out what I'll get on the 33OBX. I think you lose a little bit with the Outboards due to the DuoProps on the I/O. Boattest Regal 33 XO Attachments:
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Post by wind954 on Apr 22, 2020 15:37:23 GMT -5
What was the first year of Gen V Volvo engines in the 32/33 Express? 2016??
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Post by lg260ss on Apr 22, 2020 17:40:01 GMT -5
What was the first year of Gen V Volvo engines in the 32/33 Express? 2016?? I believe so, but I would expect some to have the old engines as well. Boat builders always use up their stock of engines before using the newer models. It’s very easy to tell visually between the two engines. |
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Post by wind954 on Apr 22, 2020 19:53:10 GMT -5
thanks for the reply. Is the older version a closed cooling system?
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Post by lg260ss on Apr 23, 2020 7:28:21 GMT -5
thanks for the reply. Is the older version a closed cooling system? If you are talking about VP 300 engines which is what most 32/33 express boats come with, then no the older version is a 5.7l without closed cooling. The Gen v is a 5.3l with closed cooling. |
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Post by tc33obx on Apr 23, 2020 8:43:35 GMT -5
I thought the Volvos with the iO Duo Prop would do much better over the Yamaha outboards overall. Clearly, the duo props give the IO boats a hold shot and top speed advantage but the MPG cruising figures seem to be very close for similar boats. I only have 1 run on my 33 OBX of about 2 hours and only 7 hours on the engines total so they aren't yet fully broken in, but she was pretty much cruising at 1.3 to 1.4 per gallon with a full 250 gallon tank and just me in the boat on decent water. That was at around 3900 to 4000 RPM at close to 30 to 32 MPH.
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Post by gofast24 on Apr 23, 2020 10:50:36 GMT -5
My thoughts = A few percent difference in fuel consumption(especially with gasoline at $1.90 / gallon ($1.40 for regular here in GA) , probably not at lake side marinas, they will keep the price high until they have to fill their 1000 gallon tanks again?)would not sway me from the great increase in boat cabin room. Also, the weight difference in the OD/ Inboards vs outboards has to have a lot of advantages as well? Another thought= with outboards assume you dont have to do much for winterizing for sub freezing temps regarding the engines vs. OD/Inboards having to drain and fill sea water side with antifreeze?
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Post by tc33obx on Apr 23, 2020 11:29:44 GMT -5
in my case with moving to the 33 OBX from the Diesel IPS 4460 it was more about getting a good size boat I could use at the Jersey Shore for the kind of boating we do down there. The past two years I used by 22 foot Bryant, but it's not really big enough for me to take my entire family to the sandbar especially when the grandchildren are down. It's also an IO boat, and I didn't want to tear the outdrive apart running it in salt water all the time. The boat stays in the water down there from late May through August. The 22 only could handle 8 people at most, we sometimes have a need to transport 10 or 11. On the flip side, my 4460 was way too big for the Jersey shore bag bays. while it only pulls 35 inches of draft from the water line to the bottom of the IPS drives, which is good for a boat it's size, that is way to much draft for the back bays between Cape May and Sea Isle to be comfortable. So I never ever considered taking it to the Jersey shore.
I think I mentioned previously in other threads that the 4460 sat all summer not being used. So my move to the 33obx was driven to get a boat that is big enough to use at the Jersey shore but still has a fantastic draft profile (33OBX is 21 inches with outboards up and about 28 or 29 inches with the outboards all the way down and I can run up to the sand bar with them up and only really pulling 21 inches of draft. Plus as you noted in your last sentence I can pull those outboards completely out of the water when the boat is at the dock, and flush them of the salt water completely every time I use it. Which is as important as the draft options.
Mileage isn't so much of an issue to me, but I was hoping the 33 with the outboards would be somewhere close to 1.5 mpg at cruise and I think it eventually will be once it breaks it. At least close to that.
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