Tecumseh/Craftsmen lawnmower needed. The carburetor is not fouled; the oil just leaks out the top, or so I think, since I couldn't remove the flywheel (don't have a tool) and really inspect the breather. Only negative comment would be the seller uses Canada Post..pathetically slow,should be using private courier for $90 item or be prepared to wait 2-3 weeks for shipping. Clean the dirt and oil off the deck and fill tube. A friend called with a LT1050 and said he noticed oil on his mower deck, oil level was low and when he started engine and engaged the deck, smoke came LT1050, oil leaking onto mower deck - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum Riding Mowers & Tractors: Leaking oil or gas Check the oil level when the engine leaks oil. Yes No. Model #917.273644 Lawn Tractor -- Last night the tractor started leaking oil from the bottom of the engine. I have a MTD lawn mover with a Tecumseh LEV115-350146E engine. The old crankcase breather was "spitting" oil onto the deck..about 3/4 once each cut..fixed. A leaking head gasket or sump gasket can also cause oil leaks. If this happened, you may have extra oil (or have plenty after losing some). I took the mower deck off tonight and looked at the area. Exactly what my 6 hp. The oil leaked onto the deck of the lawn mower. from what I have read it is the crankshaft seal that is leaking. So I have used it a couple of times since then and both times, maybe about 1/4 cup - 1/2 cup of oil … It looks like it is coming from the spindle the lods the pully for the secondary belt. there is oil leaking from the bottom of my mower. it truly is trouble-free for the bolts that carry the motor to the backyard mower deck to go back loose and fall out. This summer it developed an oil leak on the outside of the engine block. The oil comes out and runs down the engine onto the deck of the mower. I overfilled it a couple of weeks ago and then I tipped it to dump some out and brought it down to Full level. (the mowing belt). remove it and check for cracks or a bad o-ring. Then put in a new plug and try it. I took the cover off, and it looks like the oil could be coming out of the breather assy. I could never is … read more oil everywhere. Or, depending on how the carb was positioned when it was tipped, the float may have stuck open, poured fuel into cylinder washing the oil off the rings, and mixing with the oil. Get shopping advice from experts, friends and the community! In this video you will see that replacing the Oil Seal on a lawn mower engine is really not that difficult. If so do I have to remove the engine to replace it. Pull it over some more. Drain oil to the full mark on the dipstick if you find the engine overfilled. Look for oil (or fuel) to spray out. If you tip a lawnmower greater than 15 degrees with its carburetor pointing downward, then oil can leak from the crankcase and into the breather tube. It was a stead heavy flow. that enables the mower to bypass off of … Cancel. Answer this question I have this problem too Subscribed to new answers . My mower is leaking oil onto the top of the deck, but still running OK. Is this a good question? The most common cause of a Briggs leaking oil onto the mower deck is the oil fill tube is cracked, loose or the o-ring at the base of the tube is bad. Score 0.