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Hercules D138ER HELP!!!

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saltspringserge
New member
Username: saltspringserge

Post Number: 1
Registered: 01-2006
Posted on Tuesday, January 17, 2006 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I am doing research on behalf of a neighbour who is a wooden boat enthusiast. He recently picked up an old fiberglass ex-navy launch (24ft?) that had a pooped 45hp Waukesha and has been working on a '66 Hercules D138ER to replace it. I have been searching for hours trying to find anything I can about the Herc but am getting quite frustrated. Engine in question seems to be a conversion with a custom manifold/waterjacket and may have origionally been a generator engine. It is almost up and running except there are four wires coming off the carb (?) that he is not sure about. We are seeking knowlegable advice and possibly shop manuals, links to WHY, specs (we are not even sure of the Hp but guess it between 80&90hp). Any info would be extremely appreciated, I can be contacted at sergestone@hotmail.com and I'll also check back here regularly. Information on the Waukesha engine would be exceptional too. Thankyou in advance.
Great site btw, lots of interesting topics.
Cheers, Serge
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larry_from_maryland
Senior Member
Username: larry_from_maryland

Post Number: 281
Registered: 07-2003
Posted on Tuesday, January 17, 2006 - 07:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Whats the number on the waukeshaw?It might help if you could post pictures of either.
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larry_from_maryland
Senior Member
Username: larry_from_maryland

Post Number: 282
Registered: 07-2003
Posted on Wednesday, January 18, 2006 - 12:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I don't see any models listed useing your numbers.Check the model number and post again.If it has a carb its gas and would have a G or more letters.
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saltspringserge
New member
Username: saltspringserge

Post Number: 2
Registered: 01-2006
Posted on Friday, January 20, 2006 - 11:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Alright, hope this works, it is a diesel (my bad on the carb)here is a pic of the herc and the fuelpump wires in question, we guess that two are power for the pump and two are either a pressure sensor or cut-off. Buddy Chris (his engine btw) tells me the system is 24volt, but he has no idea what the wires are or what power they should have/gauges w.h.y.. We cleaned up the brass plate with toothpaste but these were the only things we could (sort of) read:
#'s at the top of plate (seems to be in both corners)> D198 E(or F)RX20
Just below that is> #3210135
Date of manufacture is> 11/8/66
The rest is unreadable bits and pieces.
If it helps the casting numbers are> M255375, below that is GWG E256
Thankyou very much for the interest guys, I hope someone can help! When I get a chance I'll gather what info I can about the Waukesha (it is under wraps right now), we do know that the crank is broken :-(
Thanks again,
Serge Stone




Old Herc 4cyl.
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larry_from_maryland
Senior Member
Username: larry_from_maryland

Post Number: 283
Registered: 07-2003
Posted on Friday, January 20, 2006 - 12:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Those numbers are much better.D198 is about45 continous hp.@1800rpm.4inch bore and stroke of 4.5.24 volt is common on military generators.I worked on a differant models years ago.They had one wire that when you added current they ran at rated speed and another wire ran at idle.With no current to any wire they would not run.There was NO cut off wire you just turned off all the juice and the engines would stop.In this case we had 5 or six wires left over that we never used.I know a fellow who put a 6 cylinder version of this engine in a tractor.He has been useing it for more than 20 years.Thease engines show up all the time as military surplus.
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larry_from_maryland
Senior Member
Username: larry_from_maryland

Post Number: 284
Registered: 07-2003
Posted on Friday, January 20, 2006 - 06:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I was rushing at lunch time and may have not said it perfect.Your engine should have the internal constant run selonid.So one wire that comes out is the ground and one wire energises the selonid so the engine will run.I have seen guys replace the govner parts so the engines can be run without electric.Your engine could run at 2400 or higher and the HP would be higher.In the late sixtys the model number was changed to D2000,but the engine was still the same.If you need other data i can look up most anything.
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saltspringserge
New member
Username: saltspringserge

Post Number: 3
Registered: 01-2006
Posted on Saturday, January 21, 2006 - 11:00 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks Larry! Yup, we figured it had been part of a gen-set origionally. So the two top wires would be the solenoid, ones white, figure that must be the positive, and it needs power to open the fuel. So does that mean that the lower two wires off the left side of the pump are for the pump itself? How should this unit be wired and at what voltages? How/what would the switches be? Any ideas? The engine was ripped out of its previous boat by people who didn't keep track of such things (whatta pain). Thanks!
:D
Serge
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larry_from_maryland
Senior Member
Username: larry_from_maryland

Post Number: 285
Registered: 07-2003
Posted on Saturday, January 21, 2006 - 12:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

No the lower wires are the run selonid.The upper wires go in where there normally is a plug.just inside is the bottem of the safty screen and the preasure reilf valve that ajusts how much the gear pump preasure it puts out.It could be a differant way of shutting down the engine as a safty mearure.You can use a normal gas ignition switch and hook right up to the coil or ingnition post.
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bobobolinsky
New member
Username: bobobolinsky

Post Number: 3
Registered: 05-2007
Posted on Wednesday, January 30, 2008 - 06:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi check out Herc history
http://www.dieselpowermag.com/news/0610dp_hercules_diesel_engine/
Sorry if it chops up the address

Robin

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