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Message |
    
Andrew Menkart
Moderator
Username: andrew
Post Number: 784
Registered: 11-2001
| | Posted on Thursday, November 16, 2006 - 08:55 pm: | 
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The following came in from Chuck Franklin:
quote:I just picked up a Dunn engine which I think is quite old and need additional info.
Does anyone have any manuals or method of dating these engines? Mine has a timer on the end of the cam shaft next to the prop shaft,no oil pan or place to install one and no side for the crankcase, it is truly an open frame engine. I will be looking for a Carb and other misc small parts once i get in to it. It appeaers to be fresh water engine as the water jacket is in excelent shape.
I will try and post some photos, all thought they are not the best this is just a start.
Thanks
Chuck Franklin
Hampton, VA
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RichardDurgee
Senior Member
Username: richarddurgee
Post Number: 1341
Registered: 11-2001
| | Posted on Monday, November 27, 2006 - 06:36 pm: |
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Looking closer at Chucks Duun II Those oil cups in the cyl flange are not on any of the engs I've seen, later ones have grease cups through the side panels ??
Chuck are there oil splash tabs on the rod cap bolts ?? |
Keith Billet
Senior Member
Username: keith
Post Number: 166
Registered: 02-2002
| | Posted on Monday, November 27, 2006 - 07:28 pm: |
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No holes in the flywheel and the timer is located at the rear. Doesn't appear to have mounting holes on the cylinder flange for side guards. Is this earlier or later? I would think early. |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 202
Registered: 07-2002
| | Posted on Tuesday, November 28, 2006 - 06:36 am: |
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Tom's engine has a boxed heat exchnger exhaust-intake, Chucks doesn't have any holes or a flat flange for this. Are the exhaust holes tapped for pipe fitttings? |
Tom Stranko
Senior Member
Username: thomas
Post Number: 241
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:06 am: |
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These are 1911 DUNN catalog images that Richard was nice enough to email me when I was restoring my twin. I will post one per email
Your engine timer does not look like the 1911 or the later one like mine. Could the timing adjust lever "reach over" somehow to a tab on the body to allow timing changes?
ANY CHANCE TO GET PICTURES OF THE SIDE FACING THE WALL??
Thanks |
Tom Stranko
Senior Member
Username: thomas
Post Number: 242
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:07 am: |
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Tom Stranko
Senior Member
Username: thomas
Post Number: 243
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:09 am: |
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Tom Stranko
Senior Member
Username: thomas
Post Number: 244
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:18 am: |
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The 1911 Twin engine above has the really old timing adjust lever mounted on the extreme forward end of the cam shaft. The 1911 timer is an all open construction that is really a primitive distributor in that the HV and the battery voltage are controlled. They must have had a lot of trouble with that in a wet boat.
Since I have never really held that style "distributor" in my hand I can't say how the low V really was handled. I doubt it was much different than other engines. |
Tom Stranko
Senior Member
Username: thomas
Post Number: 245
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:26 am: |
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Tom Stranko
Senior Member
Username: thomas
Post Number: 246
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:30 am: |
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The rear view shows a better look at the "distributor" and you can see the threaded openings for the exhaust piping (no cast iron box unit like my twin).
Also note the oiler is in line with the wrist pin for better (??) oiling. (twin only according to the other pics) |
Tom Stranko
Senior Member
Username: thomas
Post Number: 247
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:31 am: |
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Tom Stranko
Senior Member
Username: thomas
Post Number: 248
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 09:34 am: |
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The catalog mentions this shot showing the removable aluminum side covers. They must have been held on at the base. I suppose they could have been held by the same bolts that held the engine to the boat but that's hard to believe. |
Tom Stranko
Senior Member
Username: thomas
Post Number: 249
Registered: 07-2002
| | Posted on Saturday, December 02, 2006 - 01:09 pm: |
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Chuck, I notice Richards 1911 catalog says (under the 3 cylinder engine) that a cast crankcase bottom along with the aluminum side shields were available. This would seem to mean that the older engines like yours might someday be found with a 2 piece bottom. (must have bolded underneath). I would very much like to get full size images from all sides
of your engne. Do you have the rods & pistons?
Tom |
Chuck Franklin
Member
Username: chuck
Post Number: 4
Registered: 05-2005
| | Posted on Saturday, December 02, 2006 - 04:16 pm: |
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I want to thank everyone for the info to date. I will try and post additional photos this week. So far the only work i have done to the engine is re-bore and sleeve the cylinder back to standard or to the size of the existing pistons which were in good shape. I really cannot find any attachment area for a oil pan or the side splash guards. Also i cannot find any serisl numbers on the engine.
Thanks again for the help.
chuck |
RichardDurgee
Senior Member
Username: richarddurgee
Post Number: 1354
Registered: 11-2001
| | Posted on Wednesday, December 13, 2006 - 06:17 pm: |
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This 1908 catalog says : Sheet Iron Covers upon request: otherwise not supplied "
1908
Can't find any reference yet to separate oil pan.
Without side covers and oil pan I guess you just go ahead and pour the oil directly into the bilge and bring level up to the connecting rod dippers, fire her up and as the oil spits out the sides back into the bilge it maintains the proper oil level ???? I'll keep looking !! |
