[AT] Cub--shouldn't have broken my resolution....

[John Wilkens]

Too many projects...so I told myself (and my wife) NO MORE old 
tractor purchases unless I can hear them run.  Well, I broke my 
promise and bought a nice looking little Cub....not running.   I 
checked compression which was pretty good (4 x 75 lbs), worked over 
the carb and filled the radiator with antifreeze and water.  No leaks 
showed up.  Started it up and it runs on the back two cylinders 
only.  The front two spark plugs have good strong spark.  I tried 
several sets of clean plugs.  A shot of starting fluid into the carb 
would not cause any response from the front two cylinders.  The head 
has been freeze cracked on the top and repaired rather well.  No 
leaks.   I had the head off and could see no leaks or problems 
there.   BUT, here's what I need help with:  after running it awhile 
on the back two cylinders I noticed a small leak in the top radiator 
tank.  When I took a close look I saw that the leak--out of the 
radiator--was crankcase oil--not milky white but slightly yellow 
color.  When I opened the radiator drain cock I got about a pint of 
plain water (no antifreeze mix) out and then it slowed down to a 
trickle of yellowish oil.  So far it has drained about 1 1/2 gal. of 
the "yellow oil" and quit draining.  I put air to the drain cock and 
hear air in the radiator but no more fluid in there.  The fresh oil I 
put in the crankcase is down about 1/2 qt..  I drained about 1/2 qt. 
oil from the crankcase and it still looks clean--no water in the 
bottom as usual when you get water in the oil.  As far as I can tell 
none of the gallon of antifreeze has come out.  A touch of of the 
"yellow oil" to my tongue doesn't have any sweet antifreeze 
taste.   So I'm stumped...really stumped, and could sure use some 
help!       John W.

                    In the wide-open spaces of NE Oregon