Harleys use a scavenging oil system and when they sit for a while, they can wet sump from oil that leaks past the oil pump check valve and into the crankcase. When you first start it up it will puke oil for a while.
It's also possible that it's over-filled and oil is coming out of the crankcase ventilator (breather.) It sounds like the bike might have an aftermarket engine breather oil collector like this on it: http://img.jpcycles.com/product/431-335_鈥?/a>
If so; drain all the oil out of this unit before starting the bike. (some water may come out too when you drain it.)
Check the oil with the bike upright and level. The oil level should be between the two marks on the stick. If it's over-filled, drain a bit from the drain hose that comes from the oil tank and has a plug at the end of it. Then start it up. If it pukes more than a quart or so shut it off and check that you have the right oil filter.
Edit: You said; ';I didn't get 1/2 pint out in all. I only put 3 qts in it to begin with, although it requires 4 qts to be full.';
It sounds like the oil sumped from the oil tank into the crankcase and it might puke more than a quart out of the breather before the oil in the crankcase is scavenged back into the oil tank.
Don't expect to get 4 quarts in it.
I have a 96 FXSTC. It won't take more than about 3 quarts.Why would oil pump out the oil cooler breather?
This sounds like a crankcase breather filter from your description. Look at the link to the J%26amp;P oil collector filter in these answers. If it looks like the little filter on the top of that then it's just a crankcase breather filter. When a Harley sits for a good while oil could sump into the crankcase and will literally puke out when the bike is started. That's not an uncommon condition. Also from your oil change description it sounds like you put in too much oil. . By the way there is a oil filter on the front of the engine, did you change that when you changed the oil? Make sure to get one for an EVO engine and not a Twin Cam. When you change the oil only start with two(2) quarts in the oil tank. Crank it up and make sure that you can see oil circulating when you look inside of the oil tank filler cap. With that part complete turn off the engine and add no more than a half a quart and check the level it should be mid-way on the stick. It's better to need to add a little as you go than to have too much oil in the tank . I hope this helps you out. Good Luck.
That's a new one on me. Could be as simple as you over filled it. Or like golden rider said some of the old models did do things like that more I think about it. Between that and the chain oiler that's where the legend of Harley's leaking so much oil came from.
Some of the older Harley's just do that, but if it has high miles on it, it may be time for a ring job.
Check to see if its overfilled, check to see if oil has a hint of gasoline odor to it, if so, needle valve in carb may be stuck open flooding gas into engine.
Sounds like something is missing.The oil cooler doesn't have a breather on it.The oil cooler is part of the closed loop return system back to the tank.The return line does not have a breather on it.
Edit If it looks like a little filter then Scooter is probably correct about the sump filling with oil.It will pump oil out the breather til the crankcase is empty.There might be a piece of crud on the check valve ball seat that is letting the oil fill the crank.As soon as the crankcase is empty is should stop puking oil but if it sits again it will probably happen again as soon as it's started.
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