brimgeorge@msn.com
New member
Does any when else have a bunch of oil, about a cup, in the crankcase after summer storage? Gravity must work on the oil over summer. So who needs fogging oil???
staggs65
Moderator
that's exactly why you use fogging oil. it stays on the parts instead of slowly running to the bottom.
brimgeorge@msn.com
New member
It's not fogging oil, it's injector oil. I think it's bleeding through the oil pump. It actually fills the carb bowls with oil. Weird.
rx1jim
New member
Did you add any oil directly to the engine such as by putting it in the spark plug holes or by fogging the engine? Putting the oil in the spark plug holes would result in puddles of oil collecting in the bottom of the crankcase.
Another possible answer is the check valve on the oil line coming from the pump to the what is called the "gear room" in the crankcase has a small leak through it. There are two check valves in the oil system. One from the oil pump to the gear room and one on the line from the pump to the fuel pump. One of the purposes of these check valves is to provide a slight resistance in the lines to prevent gravity from allowing oil to flow from the oil tank into the engine.
The oil pump delivers pure oil to the gear room to provide lube to the pair of gears that run the shaft which drives the oil pump and the water pump. This gear room is sealed off from the fuel oil mixture and needs this direct oil flow. The oil flows into this room lubing the two gears, one on the oil pump/water pump shaft and one on the crank. It also provides oil to the two small ball bearings on each end of the shaft. The gear room has a second fitting and hose which routes the oil from teh gear room to the bottom of the crankcase drirectly below the PTO cylinder. This is supplemental but necessary lubrication. Side note: This gear room is why it is a very bad idea to run these engines on a premix fule only. The gear room receives NO lubrication from teh premix fuel!!
If this is the cause of the oil puddles, I would not worry about it if only a small amount accumulated during a long storage period.
Also, putting oil in the spark plug holes and turning the engine over is far inferior to fogging the engine. The oil will only coat the cylinder walls, piston rings and piston skirts. The critical places which need a coating of storage oil, oil which has rust inhibitors, are the bearings. Fogging is the only way to accomplish this task. I use three cans, each delivering oil into each carb and just enough to cause the engine to quit.
Another possible answer is the check valve on the oil line coming from the pump to the what is called the "gear room" in the crankcase has a small leak through it. There are two check valves in the oil system. One from the oil pump to the gear room and one on the line from the pump to the fuel pump. One of the purposes of these check valves is to provide a slight resistance in the lines to prevent gravity from allowing oil to flow from the oil tank into the engine.
The oil pump delivers pure oil to the gear room to provide lube to the pair of gears that run the shaft which drives the oil pump and the water pump. This gear room is sealed off from the fuel oil mixture and needs this direct oil flow. The oil flows into this room lubing the two gears, one on the oil pump/water pump shaft and one on the crank. It also provides oil to the two small ball bearings on each end of the shaft. The gear room has a second fitting and hose which routes the oil from teh gear room to the bottom of the crankcase drirectly below the PTO cylinder. This is supplemental but necessary lubrication. Side note: This gear room is why it is a very bad idea to run these engines on a premix fule only. The gear room receives NO lubrication from teh premix fuel!!
If this is the cause of the oil puddles, I would not worry about it if only a small amount accumulated during a long storage period.
Also, putting oil in the spark plug holes and turning the engine over is far inferior to fogging the engine. The oil will only coat the cylinder walls, piston rings and piston skirts. The critical places which need a coating of storage oil, oil which has rust inhibitors, are the bearings. Fogging is the only way to accomplish this task. I use three cans, each delivering oil into each carb and just enough to cause the engine to quit.
brimgeorge@msn.com
New member
I do fog the engine, but I don't put oil in the cylinders. I wasn't worried about the problem I just wanted to know why. It toke over 7 months to accumulate. Thanks for the info!
rx1jim
New member
No problem, I am always happy to share what I have learned about these sleds.
I had the same problem last season on my SXR. Filled the carbs completely full, did not know how much was in the crankcase. I have not checked the carbs this year yet. ON a good note the carbs were extreamly clean, just needed drained. lol Al
Incidentally, a little oil in your crank case is a good thing at the end of the day, provided that all of the other internal parts were adequately protected during the summer hibernation. The oil down at the bottom will just burn off once you get the engine running and up to operating temp. Maybe just a little extra smoke in the garage is all when you get her fired up.