I have a '92 FXSTS that is not my primary ride. When it sits for a long period of time the oil drains from the bag into the crankcase. When started it spews the oil out of the vent.

First..
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No oil in the oil filter period?? Does the opening of the oil filter face down.. like the oil will drain out if sitting still?
..You need to talk to a qualified professional.. this could be very serious or SOP..

1) Drain plug for crank drain, is on the left side of the oil bag.
About a half a cup of oil, always stays at the bottom of the crankcase. (Dry sump. Keeps the crank from having to thrash a bunch of oil around )

2) Primary Cover is on the bottom, just under the derby cover. (Cover at back of Primary Cover )

3) ****** drain plug is on the same side as the fill plug.

Change the O-rings too. Help keep that baby from making 'spots'.

Regards,
joecoolvette

The engine "sumped". This means the oil drained from the oil tank into the engine crankcase.The hose is the crankcase vent. Start the bike with a pan under it to catch the oil coming from the vent hose. Run the bike to operating temp, then check the oil level. Top it off as needed.

The oil is most likely seeping into the engine and then into primary on your bike. This commonly know in this area as "oil sumping". It's quite common on the old Shovelheads and on Softails. The reason is that the oil tank is higher in the frame than the engine and gravity does it's thing over time. If the bike is allowed to sit up for an extended period of time, the oil will seep past the check ball in the oil pump and fill the crankcase with oil. Once the crankcase gets filled, the oil seeps into the primary through the Timken bearings on the left side of the engine.

If the primary is still in it's stock configuration, simply put a deep pan under the bike and start it up. It will pump a lot of oil out of the crankcase vent hose underneath the engine but it will eventually stop. Unless the primary has been converted to a "closed wet system" like an Evo has, the engine will pump the oil out of the primary as well. After a few minutes of running, shut the engine down and check the oil level. You can leave the oil dipstick out and watch to make sure oil is being pumped back into the tank. When it seems like all the oil has quit "puking" out of the engine, make sure the oil level is at least to the lower mark on the dipstick. Like I said, if the bike has been sitting up for a while, this is quite common.

Now, if he bike has been running and all the oil is being pumped into the engine but isn't being pumped back out, you may have a scavenge gear key sheared. This is unusual on a Shovelhead because they had metal breather gears in them. The Evo engines, on the other hand have plastic breather gears in them and they will break a tooth off the plastic gear, it'll go into the oil pump scavenge gears, shear a key, and the oil pump will quit pumping oil. If this is the case, you will not see any oil being pumped back into the oil tank. You can tell when it's being pumped back because the oil in the tank will be moving and it will be kinda foamy on top. This is because the oil is being pumped back to the tank. If the pump is not pumping the oil back to the tank, you must disassemble the oil pump or the cam chest and replace the sheared key.

Good Luck
Steve

If you look directly behind the oil pump, you'll see a line of three holes where hoses run to the engine on your Shovelhead. The top hose just above and behind the pump is the breather hose for the primary and oil tank. The next one down is the return hose for the oil that collects in the pirmary to be sucked back into the engine by crankcase vacuum. The lowest hose, and probably the one you are talking about is the crankcase vent hose.

This hose vents the crankcase pressure out of the engine. When the bike is allowed to sit for an extended period of time, oil seeps past the check ball in the oil pump and goes into the engine. This is because the oil tank is higher in the frame than the engine and the ball cannot make a complete seal. Now, the oil builds up in the engine cases. When the engine is started, the scavenger side of the oil pump cannot pump all the oil out of the cases fast enough and it's blown out of the crankcase vent. I've seen as much as a quart of oil pumped out of the cases before it stops. We call this condition "oil sumping".

Put a pan or something under the engine when you start it up. After running the engine for a while, the oil should stop. It makes a terrrible mess though. If the oil does not stop after about ten minutes of running or you get more than a quart of oil out of the vent hose, you may have a problem with your oil pump.

The best way to prevent this is to ride or at least start the engine up at least once a week. You can try reseating the check ball in the pump. Sometimes this works, sometimes it doesn't. Let me know if you need any more information.

Ride Safe
Steve

If your engine has been sitting for a long period of time, your engine is probably "oil sumped". Since the oil tank is located higher on the frame than the engine, if the bike sits for a long period of time, oil will seep past the oil check ball and accumilate in the bottom end of the engine. I've seen the oil tank empty into the bottom end.

Now, the engine on your 93 model is what we call a case breather. The engine's crankcase breaker is located on the engine's cases down low. Later models are called "head breathers" in that the crankcase breathers are located in the rocker boxes, up high. So, even though the oil sumps on the later engine the oil doesn't go into the breather AS BADLY as the earlier models but it still gets in there.

Look on the back of the air breather assembly. There should be a pipe coming from the front of the engine on the timing gear cover on the right side of the engine going to the back of the air cleaner. Temporarily disconnect this pipe. Start the engine and allow it to run for a few minutes. Once the oil stops coming out of the pipe, reconnect it and disassemble the air cleaner. Clean the air cleaner. If the paper air filter is saturated, replace it. Reassemble the air cleaner assembly.

Now, Check the oil. Do not add oil to the engine as long as the oil is visible on the dipstick. Start the engine ride until the engine warms up. Now, with the engine warm, check the oil. The upper line is "Full Hot" while the lower line is "Full Cold". Set the oil level halfway between the lines. Do not overfill. If the bike is going to be sittting for a while, either drain the oil tank or start the engine about once a week and let it run for a few minutes. Do not allow it to overheat.

Good Luck.
Steve

It's trans fluid. It came out of the vent tube just above the primary cover on the top cover of the trans. If you look at the tube, the inside will be wet. Run the bike up to operating temp. Check upright and level.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_5bac37c3cb991fdb

Right hand side should be a drain plug on your oil bag. Its right above your starter.

After these bikes have set for a period of time the oil in the oil tank drains to the lower end of the engine and when started after sitting the oil is usually forced out of the vents for crankcase; which on many of these bikes is through the primary and possibly to the chain oiler etc. Usually after running for a few minutes the oil is back in the oil tank and over supply to the oiler stops! Could possibly soak the clutch plates if it filled primary case also. Be sure and check oil level in tank?! If you added oil before starting it will now be overfilled after starting. This is common problem and will mend it self usually. Does make a mess in the garage toooooooo! Jesse "Leroy" Graves