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Antique Gas Engine Discussion

Nelson Bros Jumbo Engine


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  #1  
Old 06-12-2017, 07:44:44 AM
wildfire engine wildfire engine is offline
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Default Nelson Bros Jumbo Engine

I have a Nelson Bros Jumbo engine and I would like some help dating the engine. It is a 4 1/4 hp with a three digit serial number 5XX per the brass engine tag. The tag also has a picture of Jumbo the elephant on it. It is in excellent running condition and has never been restored.

I know information is very hard to come by but any information would be greatly appreciated.

Thanks
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Old 06-12-2017, 07:52:34 AM
John Savot John Savot is offline
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Default Re: Nelson Bros Jumbo Engine

About all you can say is after 1923 if it has a Wico EK Magneto.

John
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Old 06-12-2017, 09:46:09 AM
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Denis Rouleau Denis Rouleau is offline
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Default Re: Nelson Bros Jumbo Engine

Quote:
Originally Posted by wildfire engine View Post
I have a Nelson Bros Jumbo engine and I would like some help dating the engine.
Thanks
Show us pictures of your Nelson Bros. Does the serial number on the name plate match the serial number stamped on the face of one of the 2 flywheels?

Denis Rouleau
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Old 06-18-2017, 11:07:31 PM
wildfire engine wildfire engine is offline
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Default Re: Nelson Bros Jumbo Engine

The magneto is a Webster Polar Oscillator Type 60. Made by The Webster Electric Co, Racine, WIS. The name plate is brass.
The name tag is as followers:
The Jumbo Line
Model DA, Picture of Jumbo, HP 4 1/2
No 5XX
Nelson Bros

---------- Post added at 08:07:31 PM ---------- Previous post was at 07:54:57 PM ----------

The magneto is a Webster Polar Oscillator Type 60. Made by The Webster Electric Co, Racine, WIS. The name plate is brass.
The name tag is as followers:
1st line; The Jumbo Line, 2nd line; Model DA, Picture of Jumbo, HP 4 1/2; 3rd line; No 5XX; 4th line Nelson Bros; 5th line; Saginaw, Michigan. The name plate is brass.
The only casting mark on the fly wheel is a D1.
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Old 06-18-2017, 11:13:52 PM
Odin Odin is offline
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Default Re: Nelson Bros Jumbo Engine

Needs a picture to be sure, but if it has a Webster it is likely pre-1926.

Nelson Brothers records were destroyed some years after manufacture ceased when the holding company that had bought the rights decided that the spare parts market was too small to be worth keeping.

Some pictures would help. The later model nelsons had a more upright appearance to them, while the older models were longer and lower to the ground.

Being a 4 1/2HP, your engine is considerably larger than most of the Nelsons I've seen around. Usually you find the 1 3/4 and 3HP survivors, but I've seen Nelsons as big as 6HP- I actually misidentified the 6HP as an associated at first, it wasn't till it ran out of gas and stopped that I realized it had the nelson style flywheel counterweights.
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Old 06-19-2017, 07:59:41 AM
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Denis Rouleau Denis Rouleau is offline
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Default Re: Nelson Bros Jumbo Engine

Quote:
Originally Posted by wildfire engine View Post
The only casting mark on the fly wheel is a D1.
You should also look for the serial number "stamped" on the "face" of one of the 2 flywheels. It will be something like D5** or DA5**.

A 4-1/2hp Nelson Bros denotes an early engine as they were re-rated upwards to 5hp early on.

Denis Rouleau
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