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Antique Marine Engines and Outboard Motors Discussion on old marine engines, naptha, gas, oil or steam and vintage outboard motors.

Antique Marine Engines and Outboard Motors

Muncie Gear Co. Neptune OA2 ?


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Old 05-02-2019, 05:30:47 PM
rhb-3 rhb-3 is offline
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Default Muncie Gear Co. Neptune OA2 ?

I was wondering if anyone has information on a Neptune Model OA2 single cylinder boat motor. I seem to only find info beginning with models OB. The serial number is 29582C2
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Old 05-02-2019, 06:25:12 PM
DustyBar DustyBar is offline
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Default Re: Muncie Gear Co. Neptune OA2 ?

There sure seems to be a shortage of info on these motors. I have an OB2, a twin cylinder from about 1937. The only manufacture date I could come up with was based on the Tillotsen carburetor model. Mine appears to have the same Eisemann magneto used on Maytag motors. I think the magneto coil is weak and prone to failure so treat it carefully by never pulling a spark plug wire and leaving a large spark gap to jump. My motor has no clutch or reverse gear but the magneto has an advance/retard lever. I wonder if reverse was somehow achieved by retarding the spark although the rope start pulley only allows starting in one direction. I think mine is around 2 hp and it runs well.
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Old 05-02-2019, 11:16:43 PM
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ulgydog56 ulgydog56 is offline
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Default Re: Muncie Gear Co. Neptune OA2 ?

a friend of mine had a old single Neptune when I was a kid, the little bugger always ran and good to....
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Old 05-12-2019, 11:08:58 PM
Steve A W Steve A W is offline
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Default Re: Muncie Gear Co. Neptune OA2 ?

Try Neptune Ned.
Here's his website. https://www.neptuneoutboardmotors.com/
Good luck with your motor.


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