1971 OS 25 max

mitchg95 Fri Jun 15, 2012 8:13 pm

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

Ivanhoe Sat Jun 16, 2012 10:15 am

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

1971 OS 25 max Os_max11

mitchg95 Sat Jun 16, 2012 12:17 pm

thanks Wilf, i also do need a crankcase gasket

gcb Sun Jun 17, 2012 10:33 am

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

mitchg95 Sun Jun 17, 2012 3:16 pm

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

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1971 OS 25 max

1971 OS 25 max

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Re: 1971 OS 25 max

Re: 1971 OS 25 max

Re: 1971 OS 25 max

Re: 1971 OS 25 max