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Author Previous Topic: transmission removal Topic Next Topic: Rub Rail  

BILL MORROCCO

RO# 3195



Posted - Sep 30 2013 :  07:21:56  Show Profile  Reply with Quote
Does anyone have a 312 Sedan Bridge with Mercruiser 7.4(454) Bravo1 engines in it that can give me any information as to boat speed and fuel consumtion.
I was looking at one and never saw one with 7.4(454) engines.
Thanks
30' Sea Ray Weekender
23' Wellcraft 1800cc Key Largo
"Nauti-Girl"

Homeport: New Jersey

Gregory S

RO# 2620



Posted - Sep 30 2013 :  11:35:00  Show Profile  Reply with Quote
Never saw that combination. Are you sure it wasn't a BII coupled to that 454. Be careful with that model, they had a lot of engines ingesting water and I believe there was a design flaw.


Homeport: Norfolk, Va Go to Top of Page

BoatCrazy

RO# 30843



Posted - Oct 01 2013 :  09:15:59  Show Profile  Reply with Quote
I think Bravo I might be a bit light for a 454...




1988 StarCraft Bluewater 240 250hp Yamaha OX66

Homeport: Freeport NY Go to Top of Page

jtybt15

RO# 3300



Posted - Oct 01 2013 :  12:53:39  Show Profile  Reply with Quote
The Bravo series were designed for the bigger engines. They come from the TR/TRS designs. I would go with the BII or BIII for increase in efficiency. The top end of Bravos are pretty much the same. The lowers are interchangeable...depending on gear ratios.

What Gerg was referring to was the height of the risers compared to water line. I believe it was minimum 13" or add 3" or 6" spacers.






Charlie

There is much to be said, in a world like ours, for taking the world as you find it and fishing with a worm.-Bliss Perry, 1904



Homeport: Ca Go to Top of Page

jrpar

RO# 11343

Posted - Oct 01 2013 :  19:20:14  Show Profile  Reply with Quote
BII would be my choice. They are designed for HD applications.
A single on a 31 ft? Even with the big block I'd prefer twin small blocks.



Homeport: Palm Coast, FL Go to Top of Page

Gregory S

RO# 2620



Posted - Oct 02 2013 :  18:26:14  Show Profile  Reply with Quote
312 didn't come asa single engine. Where did that thought come from?


Homeport: Norfolk, Va Go to Top of Page

jtybt15

RO# 3300



Posted - Oct 03 2013 :  06:35:08  Show Profile  Reply with Quote
Can anybody answer his original question???




Charlie

There is much to be said, in a world like ours, for taking the world as you find it and fishing with a worm.-Bliss Perry, 1904



Homeport: Ca Go to Top of Page

Mike_R

RO# 32823



Posted - Oct 03 2013 :  13:28:35  Show Profile  Reply with Quote
http://www.powerboatguide.com/Free_Access_files/Silverton%20312%20Sedan%20Cruiser.pdf

True North
2007 Legacy 32 Downeast Express
Island Cove Marina
Old Saybrook, CT

Homeport: Old Saybrook, CT Go to Top of Page

Mike_R

RO# 32823



Posted - Oct 03 2013 :  13:31:13  Show Profile  Reply with Quote
http://www.boatered.com/forum/topic.asp?TOPIC_ID=136730

Seems like relevant info in this older post.


True North
2007 Legacy 32 Downeast Express
Island Cove Marina
Old Saybrook, CT

Homeport: Old Saybrook, CT Go to Top of Page
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