Reply
 
Thread Tools Display Modes
 
Old 03-08-2011, 07:28 AM   #1
Senior Member
 
knotheadcharters's Avatar
 
City: Jacksonville, FL
Vessel Name: Amar la Vida
Vessel Model: 1989 Carver Californian 48' MY
Join Date: Jan 2011
Posts: 327
ford lehman 2728T

I am looking at a boat with ford lehman* 2728T. I cannot find specs for this motor. I assume the T means turbo charged but what about rated horsepower? They have 1500 hours on them in a 1987 boat. Just trying to figure out more. Also can you just remove the turbos or are there other things that need to be done in order to convert them? Specs say boat will run from 16-20kts semi-displacement?? I find this hard to believe. *I plan on running 8-10kts and if so will that coke up the turbos or can they be run that slowlywithout problems?

Thanks
Chris
__________________
Advertisement

knotheadcharters is offline   Reply With Quote
Old 03-08-2011, 07:45 AM   #2
Guru
 
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,372
RE: ford lehman 2728T

Chris

With the serial numbers and approximate engine*build year in hand, post this same question on boat diesel.com
__________________

sunchaser is offline   Reply With Quote
Old 03-08-2011, 08:32 AM   #3
TF Site Team
 
Baker's Avatar
 
City: League City, Tx
Country: Texas
Vessel Model: Carver 356
Join Date: Oct 2007
Posts: 5,633
RE: ford lehman 2728T

I do know they made a 160hp version(rare)...a 225hp version and a 275hp version. I would assume you have to redo the fuel system as well if you deturboed it. I don't think those engines would have any issues running at slower speeds.
Baker is offline   Reply With Quote
Old 03-08-2011, 09:17 AM   #4
Guru
 
koliver's Avatar
 
City: Saltspring Island
Country: BC, canada
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 2,174
RE: ford lehman 2728T

I am guessing here.
Based on my old Volvos, that I never pushed past 2750 rpm due to other issues, the Turbos passed inspection when I sold those engines at 4500 hrs; and my present Volvos, that I installed at 1500 hrs and now have 3000, I have had no trouble with the turbos in that 1500 hrs, hardly ever running over 2150 rpm, or 8.2 knots, I don't see why you need to be concerned.
Even if your usage is contra indicated, at 100 hrs per year, you will still get another 30 to 90 years out of those engines before you do any serious damage. So don't waste any time or money trying to convert from turbo to non.
koliver is offline   Reply With Quote
Old 03-08-2011, 10:43 AM   #5
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 2,740
RE: ford lehman 2728T

Quote:
knotheadcharters wrote:




I am looking at a boat with ford lehman* 2728T. I cannot find specs for this motor. I assume the T means turbo charged but what about rated horsepower? They have 1500 hours on them in a 1987 boat. Just trying to figure out more. Also can you just remove the turbos or are there other things that need to be done in order to convert them? Specs say boat will run from 16-20kts semi-displacement?? I find this hard to believe. *I plan on running 8-10kts and if so will that coke up the turbos or can they be run that slowlywithout problems?

A boater at my marina has a 42 Marine Trader aft cabin circa 1987 (I forget the exact nomenclature) with twin Ford Lehman turbocharged 225 hp enignes. He CAN run up at 18 knots but normally he doesn't.
I am not positive what model designation the engines are.

And I agree there is no reason to remove the turbochargers.

They won't "coke up" at low rpm...that is not what coking is. "Coking" comes from too high a temperature for the oil. It can happen to a turbochrger when you rev up the engine and get the turbo really hot, then shut it down. The turbo still sppins at high rpom and it "burns" the oil, breaks it down and it cakes on the shaft and bearing surfaces. That is "coking".
It can also happen after a long hard use and shutting down before the turbo cools off. ie in a vehicle that goes hard up a long hill, pulls into a parking lot or driveway, and shuts the engine off without idling for a few minutes to allow cooling. Usually a boat has to do some idling to dock so generally this is scenario doesn't apply to boats.

You are more apt to have clogging issues with a raw water aftercooler at low rpm. The cold water will condense the moisture in the air and it mixes with the PCV fumes and clogs things up. Plus really cold air may make the cylinder temps very low and allow problems there.
These issues are resolved by running up for a few minutes near the end of a cruising day to heat the enigne up good and burn everything off.

If you are still insistant about removing the turbocharged capabilities, then you'l have to reclibrate the injection pump and "maybe" change out injectors along with replumbing the air intake system.
*
jleonard is offline   Reply With Quote
Old 03-08-2011, 10:47 PM   #6
Senior Member
 
knotheadcharters's Avatar
 
City: Jacksonville, FL
Vessel Name: Amar la Vida
Vessel Model: 1989 Carver Californian 48' MY
Join Date: Jan 2011
Posts: 327
RE: ford lehman 2728T

Thanks for all the input, looks as if no need to remove turbos, and if I need the extra speed it's there.
knotheadcharters is offline   Reply With Quote
Old 03-09-2011, 04:24 AM   #7
TF Site Team
 
Peter B's Avatar
 
City: Brisbane
Country: Australia
Vessel Name: Lotus
Vessel Model: Clipper (CHB) 34 Sedan/Europa style
Join Date: Jun 2008
Posts: 6,670
Send a message via Skype™ to Peter B
RE: ford lehman 2728T

I'm no boat engine expert, but I drive a turbo-charged car, and frankly, I stay off boost as much as I can, or it'd cost a bomb in fuel. The turbo does not suffer from not being on boost much of the time in a car, why in a boat? The engine of course will love a it of a homeward gallop, just like a horse, as others have said. Sometimes I wish my Lehman 120 had a turbo....but not often I admit. I love the fuel being the cheapest part of the whole deal.
__________________

Peter B is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ford Lehman Fuel Injectors MVDarlin Ocean Alexander 21 10-07-2017 12:06 PM
Ford Lehman Runaway patzfan4eva Power Systems 63 12-04-2016 12:13 PM
Ford Lehman Parts patzfan4eva Power Systems 4 09-14-2011 07:40 AM
heat exchanger ford lehman septembre Power Systems 5 11-15-2009 07:40 PM
Ford Lehman Pushers should get on this Ragbagger Power Systems 3 12-10-2007 08:57 AM




All times are GMT -5. The time now is 05:17 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012