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#1
08-19-2012, 01:37 PM
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Major oil leak in a 17hp series II Kohler
Hello out there and thanks for letting me join this site. My son and I are just getting into the older IH/cub cadets. We just purchased from an elderly couple a nice looking 782 IH/cub, and a fixer 1650 cub. The question I have is for the 782 with what looks to be a series II 17hp opposing twin, it starts and runs great, no noise or smoke, no problems under a load either, just like it should. But, it leaks oil like crazy from I belive, the rear crank seal behind the flywheel and alternator. Compression is around 85 psi in each cyl. I put compressed air to the motor and oil leaked from rear seal, I can't believe it would need rings cause everything seems to to rule that out exept for the pressure inside forcing oil out. There is positive and negative pressure felt from the dipstick tub when it's running though. Maybe an oil pressure regulator malfunction? If any one can give me some thoughts it would be greatly appreciated. Thanks
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#2
08-20-2012, 09:56 AM
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I myself am new to Cubs however I did run the crankcase vacuum check and cylinder compression check as recommended in the Kohler manual on this site. I constructed the U tube manometer and my KT17 II had normal crankcase vacuum. I also put an analog vacuum/pressure gage on the fill valve put it wasn't a dampened/oil filled gage and just fluctuated like crazy so not very effective at reading vacuum. Don't know if your low compression can be attributed to the leaky seal because you are reading on the other side of the piston rings. Just my 2 cents worth. Good luck with your 782!
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#3
08-20-2012, 11:53 AM
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major oil leak in 17hp kohler series II
Thanks for the ideas, what should the compression be in these motors? I thought 85-90 psi per cyl. was a pretty good sign. I have yet to pull the front cover off and inspect the oil pres. regulator. I am also interested in pulling the block off plate from the side of the motor and installing a remote filter set up if thats possible, an oil pressure gauge would be nice also!
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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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