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#1
10-19-2014, 10:01 PM
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Help, get this motor running
Got a cub 123 from the junk yard. It's missing the starter generator and looks like there was some problems with it. I put on a good starter generator on it and the voltage regulator was making a weird noise. So then hooked up the coil to the positive and jumped the starter. It would spin a little faster. I'm only getting 30psi on a compression gauge. Time for rebuild???
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#2
10-19-2014, 10:07 PM
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Is it an acr motor? Automatic compression release? Sometimes compression can be a hard read on these things
__________________
104 puller, 1200 puller, 1450 toy!
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#4
10-19-2014, 10:21 PM
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#5
10-20-2014, 12:39 AM
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If you remove the cam cover and unhook the acr springs you can get an idea of the compression, but not a great one. A cylinder leak down test is better. I would say it was in a junkyard for a reason. I would try to get it running and go from there. Least pull the head . I'd say she gonna need a rebuild.
__________________
Brian April 1979 1200 Quietline 44A deck 1988 1211 customized into a 1288 with a K301AQS 38C deck and a 1864 54” deck . Snow blades 42" and 54" . Brinly disk, brinly plow a cultivator and a $5 brinly yard rake! 
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#6
10-20-2014, 06:39 AM
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you have to spin it backwards to get compression readings or at least from what ive heard , got any pictures
__________________
1981 cub cadet 682 1975 cub cadet 1100 440 Polaris engine 1966 cub cadet 122
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#7
10-20-2014, 08:48 AM
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How good are the points and spark plug and are they clean? Is the coil and the condenser a good one? Is it timed correctly? Is it getting fuel to the carb and is the carb ok? If you have 35 psi compression on an K301 ASR it should at least sputter
 . If you have spark, fuel and correct timing, it should start!!
__________________
Patience is the key to success  . The difficult, I'll do today . The impossible, I'll do tomorrow 
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#8
10-20-2014, 09:09 AM
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#9
10-20-2014, 09:18 AM
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being able to push the tractor is not abnormal especially if it hasn't run for awhile or if the trans disengage is engaged or stuck. Hydro's won't try to turn the motor when rolling like a gear drive.
If the cover is on the points, remove it and first just visually look at them. If they are all crusty white and corroded at minimum they will need a good clean up with emery cloth or a points file. then check the gap. You can then crank it to see if you have fire between the points contacts, if so you are good there, if not make sure you have power to the points, if yes replace the points.
__________________
782D, 1450, 100, SO 76, 60, 102 puller, 3314 self propelled and 3323 push w electric start 
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#10
10-20-2014, 09:36 AM
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As much as needs done to this machine, I'd suggest starting here..... K Series Service Manual
Since you got it out of the scrap yard, I'd pull the head before I went too far. Drain the oil and see what's in it too.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
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