powerstroke engine used in marine applications ? - Diesel Forum - TheDieselStop.com
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Upgrades and Aftermarket - 99 & up 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 08-13-2005, 11:59 AM   #1 (permalink)
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powerstroke engine used in marine applications ?

Does anyone have any information on converting 7.3 powerstroke engines for marine use, any help would be greatly apprietiated
Thanks, Amthatiam
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Old 08-13-2005, 01:08 PM   #2 (permalink)
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Re: powerstroke engine used in marine applications ?

As long as you used a separate liquid to liquid cooler to run the actual fresh/salt water through and not let it actually enter the powerstroke coolant system, I think it would be pretty straight forward. The outdrive mount-up to the engine could be tricky. But maybe not.

Of course you realize that a liquid to liquid intercooler is going to be utilized to give you unbelievable intake charge cooling ability for stupid power. You could forget about overheating the coolant. You can always make more usable power in a marine application because of the endless cooling capability.

You're a man after my own heart. I've always wanted to do that.

Good Luck,

Charlie
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Old 08-13-2005, 02:57 PM   #3 (permalink)
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Re: powerstroke engine used in marine applications ?

It'll bolt up to a Bravo I, II, or III. Probably need different mounts. Mercruiser uses their own closed cooling system and a little different aftercooler. Keep in mind that the marine D7.3L D-Tronic runs a lower compression ratio of 15.5:1 instead of the PSD's 17.5:1, and it runs 300 hp at 3800 RPM. So the pistons, injection timing, PCM control, etc are going to be different. Do-able, but maybe costly.
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Old 08-13-2005, 09:09 PM   #4 (permalink)
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Re: powerstroke engine used in marine applications ?

that would be awesome to have a water cooled exhaust system !!!! have the headers have water jackets and mabey a turbine housing!!!!! awesome temp controller there [img]/ubbthreads/images/graemlins/phoney.gif[/img]
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Old 08-14-2005, 05:26 PM   #5 (permalink)
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Re: powerstroke engine used in marine applications ?

thanks for the feed back guys, gooch in particular for directing me in the direction of mercury/mercruiser.
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Old 08-16-2005, 03:39 PM   #6 (permalink)
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Re: powerstroke engine used in marine applications ?

[ QUOTE ]
It'll bolt up to a Bravo I, II, or III. Probably need different mounts. Mercruiser uses their own closed cooling system and a little different aftercooler. Keep in mind that the marine D7.3L D-Tronic runs a lower compression ratio of 15.5:1 instead of the PSD's 17.5:1, and it runs 300 hp at 3800 RPM. So the pistons, injection timing, PCM control, etc are going to be different. Do-able, but maybe costly.

[/ QUOTE ]

Gee Gooch, It seems I read somewhere?, a post by some one?,that the only threads you reply too are coolant related? [img]/ubbthreads/images/graemlins/grin.gif[/img]

I'd tend to agree with Gooch on the cost. To buy all the pieces separate to convert a truck engine, you may not be far from a package from Mercruiser unless you can find a blown/submerged motor,salvage parts,etc.
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Old 08-16-2005, 05:01 PM   #7 (permalink)
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Re: powerstroke engine used in marine applications ?

I wakeboard and would love to have the extra weight, torque, and fuel savings of a turbo diesel in a boat.

Here is a link from another board I frequent.


http://marinedieselusa.com/marine-engine-towsport.html

You can go to the main site http://marinedieselusa.com for more general info. Its not exactly a PSD, but good info anyway.
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Old 08-16-2005, 05:37 PM   #8 (permalink)
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Re: powerstroke engine used in marine applications ?

[ QUOTE ]
Gee Gooch, It seems I read somewhere?, a post by some one?,that the only threads you reply too are coolant related? [img]/ubbthreads/images/graemlins/grin.gif[/img]

[/ QUOTE ]

You're right...what was I thinking!! [img]/ubbthreads/images/graemlins/grin.gif[/img]

Their "retirement" has been good. I notice I'm not having to put out as many coolant-related fires lately. And my posts are actually in my own words. [img]/ubbthreads/images/graemlins/grin.gif[/img]

BTW, I worked on a few marine D-Tronics for some buds a while back. It's a great reliable diesel engine for marine apps. Just heavy, and a little odd to gear for.
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Old 08-17-2005, 02:31 AM   #9 (permalink)
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Re: powerstroke engine used in marine applications ?

The diesel engine that they are talking about in that web page is GM's famed 6.5 used from 1992 to about 1999 in there trucks. It is a good light duty engine, but nowhere near a powerstroke(I know my current suburban has one of em in it [img]/ubbthreads/images/graemlins/smirk.gif[/img]).
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Old 08-17-2005, 06:12 AM   #10 (permalink)
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Re: powerstroke engine used in marine applications ?

[ QUOTE ]
wakeboard and would love to have the extra weight, torque, and fuel savings of a turbo diesel in a boat.

Here is a link from another board I frequent.



[/ QUOTE ]

Why? You would collapse from the fumes after about 5 minutes? [img]/ubbthreads/images/graemlins/phoney.gif[/img]
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Old 08-17-2005, 08:10 AM   #11 (permalink)
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Re: powerstroke engine used in marine applications ?



[/ QUOTE ] Why? You would collapse from the fumes after about 5 minutes? [img]/ubbthreads/images/graemlins/phoney.gif[/img]

[/ QUOTE ] Nah, just put a stack on the exhaust. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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Old 08-17-2005, 08:54 PM   #12 (permalink)
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Re: powerstroke engine used in marine applications ?

Gooch, why do they run lower compression on a boat engine? On a gasser you can ususally bump the CR a little bit for a boat. [img]/ubbthreads/images/graemlins/shrug.gif[/img] A PSD in a boat is something I have been thinking about also.
Tim
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Old 08-17-2005, 10:35 PM   #13 (permalink)
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Re: powerstroke engine used in marine applications ?

[ QUOTE ]
Gooch, why do they run lower compression on a boat engine? On a gasser you can ususally bump the CR a little bit for a boat. [img]/ubbthreads/images/graemlins/shrug.gif[/img] A PSD in a boat is something I have been thinking about also.
Tim

[/ QUOTE ]

The GM 6.5 TD has a marine version that runs lower compression and as I recall they said it was because a marine engine is under a constant high torque load and prone to generating more heat. A truck engine is nearly constantly changing speeds and loads, justifying higher compression. Lower compression matched for the work perfomed on an overall basis (mostly long range cruising with a fairly high torque load) generated less heat and better longevity. I think they were around 17:1 compression.
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Old 08-18-2005, 12:08 AM   #14 (permalink)
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Re: powerstroke engine used in marine applications ?

I would agree, most boat engines could be considered operating at "full load" all the time.

Especially in the type of hull a PSD would be used in. [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 08-18-2005, 07:55 AM   #15 (permalink)
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Re: powerstroke engine used in marine applications ?

I just want you guys to know how much I hate you for bringing this topic up [img]/ubbthreads/images/graemlins/frown.gif[/img]
I swore I would never waste money on a boat again and now I find myself wandering what I did before! How much fun could a boat be with a 600hp Power Stroke in it.

PS How much power will a sterndrive hold?
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