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I need to change the oil, and I can't find the oil plug anywhere. I hear it is square shaped and recessed. The manual indicates the oil plug can be on the bottom or the side and it is one of 3 shapes. I don't see anything square shaped anywhere on the mower. I tried undoing bolts near the blade underneath, and none of them seem to work. I tried turning the mower over in order to remove the blade to look for the oil plug, and the mower began leaking gas, so I stopped. How on earth do I find this thing? Is it on the side with the carburetor or the other side?
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it takes a while for the oil to get to the pistons threw the maze of oil distribution ducts. so when you start it. the pistons are almost dry. and you can hear the piston walls slapping the sides of the cylinder walls as the crank passes top dead center and the force of the piston's pressure switches from one side to the other maybe it was run without oil once and wore out a little.. it might be close to the end. or it could go for another 200,000 miles depending on how worn out the pistons are.. thats why they make "high mileage" oil, it's thicker(higher viscosity higher sea number) so when the piston slaps the cylinder wall , it doesn't squirt the oil completely away and provides more lubrication.
an analogy might be to look at a worn piston as that the older and more worn out it is, it's profile changes from square shape to triangle shape(more like trapezoid shape). but upside down triangle instead of a square profile
The plug is on the crankcase - the oil pan. You will find it on the bottom of the oil pan, or at the bottom edge -front, side or rear.
Depending on what sort of vehicle you own, the plug may either be a square peg, a normal 'nut shape or it may be a recessed fitting - square or hex.
The link below will give you a general idea of where to look and what to look for.
A manual gearbox ...
The filler plug will be on the side of the gearbox. You've got to crawl underneath your car...
Here's a couple of generic images:
The filler plug will either have a square recess (as in first image) or a splined recess (as in the 2nd image) .. it may even have a square peg or even an 8 sided recess (its for what's called an 'allen key' in the UK'.
Whatever type of filler plug is on your gearbox .. undo it and fill up with the correct oil until it 'runs out of the hole'
There should be a drain plug on the side. Usually where the oil goes in by the dipstick, it will be a square headed pipe plug. Also check the bottom of the engine for pipe plugs into the case. These will have a recessed square opening that a 3/8" ratchet or extension will fit into.
There is a fill plug on the side if the transmission, you must get under the car to see it, it is a pipe threaded plug, it should be a 3/4 pipe plug, it will be either an Allen recessed head plug or a square drive standard pipe plug. To check the level pull the plug, put you pinkie finger in the hole, the transmission lube should be just below the threads of the plug in the transmission case. If the fluid needs to be topped off it uses ATF type DEXRON VI, (replaced all earlier DEXRON types) yes manual transmissions uses ATF also.
Hi marybasrai...
Look under the mower to find a square plug/allen key plug and remove that plug will allow you to drain the oil from the mower
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Find a piece of keystock the right size and put it into the hole. It is most likely metric. If the 3/8" drive is loose, get 10mm keystock. If it's tight, get 8 or 9 mm keystock.
For a manual transmission you need to use gear lube not transmission fluid. There is a plug, it should be about 2/3 of the way up on the side of the transmission. The plugs vary, it may be square, hex or recessed
On most differentials, there is a plug. It will have a square recess in the plug. Using a 3/8" ratchet and extension, place the extension in the plug and turn counter-clockwise to remove. (No socket required, just the extension.)
On most vehicles, the oil should be just below the level of the hole. I have relatively small hands, I just use my little finger to check the level of oil.
In past, I always used 90 weight gear oil to bring level of, but depending on your differential, you may need a special oil. (My 2001 Tahoe with locking differential used a synthetic oil. The dimwits at the oil change place added regular 90 weight oil, even after I told them not to, had to have dealer drain, and replace.)
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