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Looking for Lathrop Engine

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onelung
New member
Username: onelung

Post Number: 2
Registered: 12-2014
Posted on Friday, December 12, 2014 - 11:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I am interested in finding a Lathrop engine. Any suggestions?
Thank you
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ernie
Senior Member
Username: ernie

Post Number: 1916
Registered: 01-2002


Posted on Saturday, December 13, 2014 - 08:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

HI,
They are around but we need to know
What size, what condition what style
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onelung
Member
Username: onelung

Post Number: 4
Registered: 12-2014
Posted on Saturday, December 13, 2014 - 09:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I don't know the entire Lathrop engine line-up. But I was hoping to find a one or two cylinder weighing under 1000 lbs and in any condition. The engine does not have to be operational. I was hoping to find one complete or "mostely" complete.
I am a marine engineer, so I have the knowledge to rebuild.
Being a mystic resident I will be proud to have one of our Lathrop engines come home and receive the love and attention it deserves.
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ernie
Senior Member
Username: ernie

Post Number: 1918
Registered: 01-2002


Posted on Saturday, December 13, 2014 - 12:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a 4 or 5 HP early 2 stroke freshwater engine. It has been partially apart for many years and will need to be sleeved. However the water jacket is good. Most salt water Lathrops are junk due to salt water and the fact that Lathrop never put any nickel in the castings.
It is missing the oilers grease cups and check valve. I most likely have a carb.
It has a tag with SN but no HP
Click on my name to the right and send me your e-mail and I will send you pics. The engine is in Taunton.
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onelung
Member
Username: onelung

Post Number: 5
Registered: 12-2014
Posted on Saturday, December 13, 2014 - 12:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

rob535@hotmail.com
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ernie
Senior Member
Username: ernie

Post Number: 1919
Registered: 01-2002


Posted on Saturday, December 13, 2014 - 02:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard,
Any idea what it is?
I think the bore is 4.5









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ernie
Senior Member
Username: ernie

Post Number: 1920
Registered: 01-2002


Posted on Saturday, December 13, 2014 - 02:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3417
Registered: 11-2001
Posted on Saturday, December 13, 2014 - 03:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Lathrop spec sheet for single cylinder


l102
L202

I'll try to get an approx. mfg date by the
tag style ?

Engines with no numbers on tag, some had numbers stamped on top of cylinder block between stud bolts ?


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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3418
Registered: 11-2001
Posted on Saturday, December 13, 2014 - 08:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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This tag on the above lathrop

learly

Appears to be the earliest style tag,
last used in late 1906 early 1907.


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onelung
Member
Username: onelung

Post Number: 6
Registered: 12-2014
Posted on Sunday, December 14, 2014 - 11:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Ernie, Can you please find the other components of the engine not pictured? (Head, carb, etc)
I plan to see you the after Christmas with my trailer and some boards to create a ramp for easy loading.
Should I build a base to hold the engine during transport, if so; can you please tell me the diameter of the flywheel ("A") and the width of the mount ("K"). That way I can construct a skid before coming to see you.
Thanks again,
Rob
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onelung
Member
Username: onelung

Post Number: 7
Registered: 12-2014
Posted on Sunday, December 14, 2014 - 11:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard,
Thanks for posting the Lathrop spec sheet.
Rob
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ernie
Senior Member
Username: ernie

Post Number: 1923
Registered: 01-2002


Posted on Monday, December 15, 2014 - 04:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

NO base needed for transport back to Mystic
No ramps needed either as I have a means of levitating it
All the parts are in one spot already
Give me a hollar when you are ready
I am not around the 26th
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miro
Senior Member
Username: miro

Post Number: 784
Registered: 11-2001


Posted on Tuesday, December 16, 2014 - 08:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

It's great to hear of an engine going to a "good home" to resurrection
miro
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david_doyle
Member
Username: david_doyle

Post Number: 30
Registered: 03-2013
Posted on Tuesday, December 16, 2014 - 10:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Looking forward to, hopefully, watching this one come back to life.
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onelung
Member
Username: onelung

Post Number: 9
Registered: 12-2014
Posted on Saturday, December 27, 2014 - 07:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Serial number is 213 or 2138, hard to tell exactly.
Any one have an idea of vintage?
Restoration starts tonight.....
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onelung
Member
Username: onelung

Post Number: 10
Registered: 12-2014
Posted on Saturday, December 27, 2014 - 07:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

See image
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onelung
Member
Username: onelung

Post Number: 11
Registered: 12-2014
Posted on Sunday, December 28, 2014 - 01:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Note: The flywheel is 17-1/4 diameter and the cylinder bore is 4-1/2 ID
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3432
Registered: 11-2001
Posted on Sunday, December 28, 2014 - 01:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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The photo of the stamped number is appreciated !

In years of attempting to put a mfgr date on Lathrop 2 Strokes this is only the second early number that I have seen. It appears that early engs had 4 digit numbers and were stamped on top of block. The number in above post ( # 2138 ) certainly looks to be 4 digits even though the last number is questionable. The other engine with a 4 digit number ( # 1447 )IS in my collection and is a complete engine.

lrd1


l2


l3tag


As was discussed in above posts These unnumbered name plates ceased in 1906-7 so at this point these engines were manufactured from about 1898 to 1906-7 so about a 8- 9 year period, with only two examples and no production numbers available yet its still not possible to have very exact information ?

Anyone with one of these old Lathrops that could post photo or any information would be appreciated !

This is the tag style that succeeded the unnumbered ones 1906-7 the lowest number in my files is this one ( #15641 ). if anyone has low numbered tags of this style a photo would be appreciated ?


l5641

About 25 years ago seeing an old Lathrop marine engine in a prominent maritime museum with a date on a plaque I asked how the manufacturing date was
assigned and the curator said it was thought to be that age by the doner ? eventually it was found to be about 20 yrs amiss the real mfg date !
That started my interests in putting a little more reality into dating all of our Beloved Old Marine Engines-- Still a lot of work and long way to Go !!!


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billschaller
Senior Member
Username: billschaller

Post Number: 605
Registered: 12-2003


Posted on Monday, December 29, 2014 - 07:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

mine. bought to put out as a lawn ornament.





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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3433
Registered: 11-2001
Posted on Monday, December 29, 2014 - 07:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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APPRECIATE THE POST !

Do you suppose the second digit is a 6 or an 8 ?

That piece of iron would keep the mailbox from blowing away.


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billschaller
Senior Member
Username: billschaller

Post Number: 606
Registered: 12-2003


Posted on Monday, December 29, 2014 - 08:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My guess is it is a 6, but I never really looked at it. It's a midwest engine, so after I hauled it home, I decided a salt free motor like that deserved to be inside. I do own a salt damaged one, it is real pretty.

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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3434
Registered: 11-2001
Posted on Monday, December 29, 2014 - 10:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Very nice engine and wooden base !

Older Lathrop with single
oiler, what's the serial number ?



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ernie
Senior Member
Username: ernie

Post Number: 1936
Registered: 01-2002


Posted on Tuesday, December 30, 2014 - 09:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard,
The pic above is the last style that Lathrop built.
The following make it the latest or last style
1 flywheel puller nut, also the bolts in it shouldn't be there. Either the flywheel nut isn't properly tightened or by coincidence the holes in the nut and the flywheel lined up so they could be installed. Either way they aren't needed. The holes are to tighten or loosen the nut with a special wrench. The once the nut was loosened bolts were used to pop the flywheel off the tapered crankshaft.
2 round side covers
3 transfer passage/port on the side instead of the front. Piston baffle is fore and aft not crosswise
4 just for info the oiler isn't original. Lathrop used nickle plated oilers and this engine should have a double one. There should be a place for the oil tube to go in just above the check valve on the other side cover.
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ernie
Senior Member
Username: ernie

Post Number: 1937
Registered: 01-2002


Posted on Tuesday, December 30, 2014 - 09:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Here are pics of the oil line and where it enters the engine as well as the correct oiler.

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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3435
Registered: 11-2001
Posted on Tuesday, December 30, 2014 - 10:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Ernie I agree I shouldn't have used the word Older without looking closer at engines physical traits ! The serial number will put it close to its year of mfgr.

One of my endeavors with Lathrop 2 strokes is to list these differences of these physical traits to serial numbers.

The oldest engines had no side inspection plates, some were hot heads, early side plates were square on bigger engs, round on smaller ones, they had no oilers or prelube oilers in the plates.

these photos of circa 1920 engines ( should be 5 digit serial numbers first two being 15 or 16 )
Bills lawn ornament is a 16447 so its early 1920's ?
these engs had dual oilers but was in crankcase in two different locations ?

20s1


20s2

The more lathrop engine photos with a serial number I can record will help get them in catagories and eventually help assigning a manufacturing year !


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speedboy
Member
Username: speedboy

Post Number: 17
Registered: 08-2007
Posted on Tuesday, December 30, 2014 - 02:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)



Richard, here is another 4 digit serial number
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ernie
Senior Member
Username: ernie

Post Number: 1938
Registered: 01-2002


Posted on Tuesday, December 30, 2014 - 04:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard,
Neat add
I had always thought the round side cover engines had a flywheel nut.
Thanks for the additional info
Ernie
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billschaller
Senior Member
Username: billschaller

Post Number: 607
Registered: 12-2003


Posted on Tuesday, December 30, 2014 - 09:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

name plate
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3436
Registered: 11-2001
Posted on Tuesday, December 30, 2014 - 10:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Dan Thanks for the post, that is the highest 4 digit serial number in my files so far and the only 4 digit number on a 1907 style name plate !
Can't pinpoint its age yet but I would say this engine is well over 100 yrs old maybe 105 Yrs ?

Does the engine have square or round inspection plates, were they machined for oilers ?

*
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3437
Registered: 11-2001
Posted on Tuesday, December 30, 2014 - 10:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

*

Bill the #23799 Engine in the above post falls right on the 1927 time line- again not exact but close !


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onelung
Member
Username: onelung

Post Number: 12
Registered: 12-2014
Posted on Wednesday, December 31, 2014 - 01:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Disassembly worker
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3438
Registered: 11-2001
Posted on Friday, January 02, 2015 - 06:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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The engine in above post ( Serial # 2138 ) seems to have a casting covered by a rectangular 4 bolt plate just above the water inlet, it appears to have been capped off ?


plate


Don't have a photo of rear but I believe the exhaust port is there ?

I don't find this on any other Lathrop that has a separate exhaust port ??



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ernie
Senior Member
Username: ernie

Post Number: 1939
Registered: 01-2002


Posted on Saturday, January 03, 2015 - 09:24 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The cover on the side is to make it a 3 port.
I took the cover off thinking I would be able to inspect the water jacket and when it was removed I was looking at the piston skirt
The exhaust is aft with 4 bolts
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3439
Registered: 11-2001
Posted on Saturday, January 03, 2015 - 01:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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This is the only evidence of a Lathrop
three port engine That I have seen ? It probably puts this #2138 engine back before 1905 when Joseph Day was charging U.S. mfgrs a fee to use his English three port patent. See list in This post!


http://www.oldmarineengine.com/discus/messages/1/93671.html#POST14780


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ernie
Senior Member
Username: ernie

Post Number: 1940
Registered: 01-2002


Posted on Saturday, January 03, 2015 - 03:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Richard,
Where is Lathrop in a list in the link?
Lots of fine print and my eyesight isn't what it used to be?
Thanks
E
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3440
Registered: 11-2001
Posted on Saturday, January 03, 2015 - 03:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Ernie

Lathrop is not in the list, the mfgrs that paid Day to use the three port patent are in the list--- Lathrop didn't pay and ceased making three port engs, probably dating this lathrop # 2138 closer to 1904 ? not certain of this but is a bit more info that helps narrow the year of mfgr ??


*
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ernie
Senior Member
Username: ernie

Post Number: 1941
Registered: 01-2002


Posted on Saturday, January 03, 2015 - 05:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

OK makes sense
Thanks
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onelung
Member
Username: onelung

Post Number: 13
Registered: 12-2014
Posted on Monday, January 05, 2015 - 01:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Rear port
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richardday
Senior Member
Username: richardday

Post Number: 1109
Registered: 11-2003


Posted on Monday, January 05, 2015 - 11:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I had a large two cylinder 2 stroke Lathrop and it had a serial number under the head gasket on top of the forward cylinder. The bell housings for the crank shaft had a serial number on the Port outer rim. As I remember it the bell housings all had serial numbers on their outer rim. The bottom of the Port water jackets each had a cast iron rectangular cover bolted in place about 4X3X3/8" inches thick and behind it were large sacrificial zincs They were just small enough to allow easy replacements by taking off the the cast iron cover. They each had 4 legs about 1/2" dia by 1" long. Presumably this was to keep the zink from moving about once installed.
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richardday
Senior Member
Username: richardday

Post Number: 1110
Registered: 11-2003


Posted on Monday, January 05, 2015 - 11:42 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I had a large two cylinder 2 stroke Lathrop and it had a serial number under the head gasket on top of the forward cylinder. The bell housings for the crank shaft had a serial number on the Port outer rim. As I remember it the bell housings all had serial numbers on their outer rim. The bottom of the Port water jackets each had a cast iron rectangular cover bolted in place about 4X3X3/8" inches thick and behind it were large sacrificial zincs They were just small enough to allow easy replacements by taking off the the cast iron cover. They each had 4 legs about 1/2" dia by 1" long. Presumably this was to keep the zink from moving about once installed.
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richarddurgee
Senior Member
Username: richarddurgee

Post Number: 3445
Registered: 11-2001
Posted on Monday, January 05, 2015 - 12:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

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Dick

I looked at my lathrop records and about 15 years ago listed Your Old Lathrop twin with 4 digit serial Numbers, # 3708 and #3709
approx. mfg date 1907-08.

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