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1971 OS 25 max

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1971 OS 25 max

Post  mitchg95 on Fri 15 Jun 2012 - 20:13

hello, i got a os 25 max from 1971 from a hobby shop for $10 that i am restoring to resale, can anyone tell me information on this engine and i noticed on the carb when i removed it from the crankcase that there is a huge crack that bsically renders the rc carb useless and i was wondering if anyone could hook me up with a new carb for this engine
compression is perfect, has the flanged piston and a strap on muffler

Thanks, Mitchg95
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Re: 1971 OS 25 max

Post  Ivanhoe on Sat 16 Jun 2012 - 10:15

mitchg95 wrote:hello, i got a os 25 max from 1971 from a hobby shop for $10 that i am restoring to resale, can anyone tell me information on this engine and i noticed on the carb when i removed it from the crankcase that there is a huge crack that bsically renders the rc carb useless and i was wondering if anyone could hook me up with a new carb for this engine
compression is perfect, has the flanged piston and a strap on muffler

Thanks, Mitchg95

This might help, Mitch, friend of mine saw your request, he's not a member here so can't post it, so he asked me to do so, if you have the part numbers you can probably still get the parts from OS if all else fails, they supply most parts for their older engines

Wilf


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Re: 1971 OS 25 max

Post  mitchg95 on Sat 16 Jun 2012 - 12:17

thanks Wilf, i also do need a crankcase gasket
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Re: 1971 OS 25 max

Post  gcb on Sun 17 Jun 2012 - 10:33

Is your engine like the picture with the drop-in liner or is it the older version with the steel cylinder fins? I can't remember when they switched. They may have used the same type carb. The steel fin version was highly regarded in its day. Don't have the newer one but it was probably also a good runner.

Both are iron/steel so should get a break-in. Fuel should contain 20%-22% lube, preferably half castor.

If I understand correctly, you do not intend to run it but restore it to sell. Could you post a pic of the carb you want so folks could help you with an original? Otherwise, most any carb that would fit the crankcase would do.

George
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Re: 1971 OS 25 max

Post  mitchg95 on Sun 17 Jun 2012 - 15:16

thanks Gcb, ill try to get pictures posted sometime today or tomorrow
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