Another fuel burn question

My experience is with trawlers running Lehman's burning almost nothing and large sprt fishers burning in excess of 100 GPH. The boats I'm looking at fall in between. These are a few that are on the radar...

Grand Banks, 135 Lehmans, This is my comfort zone. I know these boats well. Problem is finding a good one or even a variant is difficult. Looked at two today that were advertised in excellent condition with meticulous owners. I didn't even make inside one of them. The other had 45YO original fuel tanks with rust coming through on the corners and lower seams, Top side gel coat was painted but chipping and chawky, gel coat that wasn't painted was cracking in numerous places, cob webs were growing between the rails and gunwales, toilets looked like they hadn't been flushed in quite a while and based on bottom growth the boat appears to have been in the water for the winter. This is one of the better GB's I've looked at and they are asking $130K.

Hatteras 42 CPMY, 3126 Cat's, 420HP.
Silverton 453, Cummins B330's, 450HP.
Silverton 38 Sport Bridge, Yanmar 6LY3-STP's, 440HP.
Cruisers 405 Express MY, Volvo TAMD74's, 430HP.

So the question is....If I run the above at trawler speeds will I see similar fuel burn as the GB with Lehman's. My first choice would be a GB or variation of GB with replaced fuel tanks and glassed decks. I have found a few single engine 34's and 36's but they are a little small and I prefer the piece of mind of having 2 engines. My second choice would be the Hatteras. Going to look at the Hatt next week. It looks nice in photos, but the two GB's I looked at today looked good in phots also.

What do you guys think? Can you run a MY with 400+HP engines at trawler speeds and get decent fuel burn?

Thanks

My brain works in GPH, so 8 kts / 2 nmpg = 4 gph? That's quite acceptable. About what a classic trawler would do at the same speed. As I get older, I find myself not caring all that much about getting there in a hurry.

The only 2 on the list that really turn me on are the trawlers and the Hatteras. I've always associated Sea Ray, Cruisers, Silverton, Carver, etc with sketchy quality.

I do have a few on the list but they are not naturals. 671TI's. I ran 6V92T's and 8V71T's in busses for a while so I'm familiar with them pre-DDEC. I have seen a few 671TI's blown up running hard in sport fishers.

That was kind of the point of the question. Trying to figure out what's crap without having to learn the hard way.

No offense taken at all. I appreciate the insight.

As a side note, the reason the later model euro styled boats like Sea Ray, Silverton and Cruisers are on the list is because the wife likes the euro look over traditional MY and trawlers.

Not to change the subject, but what's the consensus on single vs twin for near coastal and ICW? I found some nice looking single engine trawlers with bow thrusters. A 34' Marine Trader with a Cummins 5.9 6BTA, a 38' Cheer Men Europa with a New Holland and a 37' Newport with a Lehman. The 34' Trader has had new tanks installed recently. Just need to try one on and see if the smaller size will work.

In the mean time, the search continues for a twin engine trawler in the 42' range for under 200K that isn't a basket case.

10 years ago I would have been on board with this 100%. Back when we would blow a few grand in fuel in a long weekend. Now I'm retired and I'm totally OK with dropping the hook and waiting for the tide to change or weather to clear. Don't have anywhere I NEED to be anymore. Yet your point is still valid and worthy of consideration.

Seems to be a real shortage of decent boats for sale. If it hasn't sold in a few weeks it is likely junk, drastically overpriced or both. It's coming down to what I can find that fits my needs that is not a project. I'm open to both trawlers and MY's.