31 BHM owners

[monktails]

Guys,
Curious to know who is in a 31 bhm and what you are seeing for fuel burn numbers. I understand every engine will be somewhat different. Looking for numbers cruise and top end. Speed numbers would be appreciated also thanks.

 

[TwoRivers]

I have a BHM . Top speed is 12 knots ! I'm in no hurry though! It has the Cummins 6BT 5.9 210hp . I'm not sure about fuel burn . It seems to do real well ! Hope this helps.

 

[offshore31]

370hp volvo, 16kts cruise, 1.6-1.8nmpg. that's with a clean bottom, and no tide. a couple of weeks ago my timing was off, and we fought the tide out and back. down to 13-14kts. haven't filled up yet, so don't know fuel burn. fwiw, i'm on the piscataqua which splits NH and Maine. Current gets ripping in there, i think upwards of 4kts.

 

[Raider Ronnie]

370hp volvo, 16kts cruise, 1.6-1.8nmpg. that's with a clean bottom, and no tide. a couple of weeks ago my timing was off, and we fought the tide out and back. down to 13-14kts. haven't filled up yet, so don't know fuel burn. fwiw, i'm on the piscataqua which splits NH and Maine. Current gets ripping in there, i think upwards of 4kts.

You're not kidding about the Piscataqa and the current.
Original owner of my 28 kept it there at a yacht club under the bridge.

 

[Teaserhead]

I have a 1990 Flye Point finished, cruiser, with the 5.9 210 hp cummins. TD 2.5 -1 turning a 26 square wheel. With the cruiser top, full galley, gear, and 150 gal of fuel, she weighed 12,500 lbs on the lift when I unloaded her off the truck last April. I have 100 hours on her so far and is the first DE iv ever owned. I can get 2400 rpms wot, and she hits 15 knots. I cruise at 1700 and she does 9 knots, burning 6 gals pr hr at cruise. The wife loves the cruise speed, I'm glad I have auto pilot or I'd go nuts having to sit at the helm driving all the time. It might just be me, but she seems to ride awful low in the water. She throws a huge wake. There are no other DE owners local to my area, so I have nothing else to compare her to. I'm def interested in more responses to this thread. Thanks for starting it! Hope this helps.

 

[BillD]

370hp volvo, 16kts cruise, 1.6-1.8nmpg. that's with a clean bottom, and no tide. a couple of weeks ago my timing was off, and we fought the tide out and back. down to 13-14kts. haven't filled up yet, so don't know fuel burn. fwiw, i'm on the piscataqua which splits NH and Maine. Current gets ripping in there, i think upwards of 4kts.

You're not kidding about the Piscataqa and the current.
Original owner of my 28 kept it there at a yacht club under the bridge.

The Piscataqua and the Merrimack Rivers are where "real boat handlers" are made!

Not like the sissy bay boaters in some areas and ones that pull up to a "mooring ball"

 

[BillD]

I have a 1990 Flye Point finished, cruiser, with the 5.9 210 hp cummins. TD 2.5 -1 turning a 26 square wheel. With the cruiser top, full galley, gear, and 150 gal of fuel, she weighed 12,500 lbs on the lift when I unloaded her off the truck last April. I have 100 hours on her so far and is the first DE iv ever owned. I can get 2400 rpms wot, and she hits 15 knots. I cruise at 1700 and she does 9 knots, burning 6 gals pr hr at cruise. The wife loves the cruise speed, I'm glad I have auto pilot or I'd go nuts having to sit at the helm driving all the time. It might just be me, but she seems to ride awful low in the water. She throws a huge wake. There are no other DE owners local to my area, so I have nothing else to compare her to. I'm def interested in more responses to this thread. Thanks for starting it! Hope this helps.

Teaser,

FWIW,

if your Cummins 6BT 210 can "only reach" 2400 (assuming the number is accurate) @ WOT then your engine is severely over2-2.5 propped.

Your Cummins 6BT is rated 210 hp @ 2600. It is BEST to prop it to be no less than 2670 @ WOT.

Also, even though you may run mostly @ 1700-1800 rpms the engine is still working harder and generating way more heat than it needs to be. Over propping WILL shorten the life of the engine, no doubt about it.

Take a couple of inches or more of pitch out of the wheel to reach 2650 WOT and "bump your cruise rpms" up a couple hundred rpms.

Rpms are good for the engine, lugging around overloaded is not.

Again,

FWIW, Bill D

 

[Teaserhead]

BillD,
Thanks for that. I'm headed out in the morn with 4 clients and myself on a sightseeing charter, I'll make real sure on the numbers, and get back to you. Thanks again! Good stuff. This forum is the balls, and the one of the reasons I went with a DE boat.

 

[BillD]

BillD,
Thanks for that. I'm headed out in the morn with 4 clients and myself on a sightseeing charter, I'll make real sure on the numbers, and get back to you. Thanks again! Good stuff. This forum is the balls, and the one of the reasons I went with a DE boat.

Perfect.
btw, if you never photo tached the engine and compared to what the analogue tach is reading your WOT rpms will be a "guess" and could be off +- 150-200 rpms.
Keep us posted.

 

[lita11]

I have also a BMH and speed is 14 knots.

Boat plans

 

[Ditchdigger]

bhm

32' BHM, 235 HP 1982 Volvo Tamd 60 series. 3,000 hrs. Cruise at 11-12 knts. top speed 14. Burns 6 GPH at cruise. Almost embarrassing.

 

[TwoRivers]

Cruise at 11-12 knts. top speed 14. Burns 6 GPH at cruise. Almost embarrassing

The Speed or the GPH ?

 

[Ditchdigger]

The Speed or the GPH ?

G.P.H. !! The speed for the boat, which is built like a tank, with only a 235 hp engine seems incredible to me. I have known some who have added 145 hp and 60 grand only to pick up 3 -4 knts. Lots of money for a few extra knts. The 32' BHM is only made to go so fast. It has a sweet spot, that will cruise through an honest 4' sea without slowing down and No Pounding. I have been on million dollar sport fish boats that have to slow down to 15 knts in the same seas. 2700 hp /vs 235 hp with a 5 knt. difference and an 900,000.00 price difference.
No Chiropractors need on Monday ! Just my opinion. Men who earn their living on the sea use these boats. There HAS to be a reason in my opinion.

 

[TwoRivers]

Agree with everything you say! My BHM holds 180 gallons. I filled it up last year! I still have over a half tank. I posted some pics in Downeast Projects if you want to look!

 

[DKD]

370 Volvo - 2/1 gear - 26 x 24 prop
2000 rpm-15 knots, 2150 rpm-16 knots, 2250 rpm-17 knots, 2300 rpm-18 knots, 2800 rpm-22 knots
Speeds are with full fuel, gear and ice.
Between 2150-2250 average between 1-1.25 mpg.