Small Engines (Lawn Mowers, etc.): change oil, oil filler cap, oil drain plug

Question
Hi Ben,I have a tecumseh engine  hs50 67074 41588 on a snow blower by toro it is a 5 horsepower and with is 24.I was wonder what is the proper way to change the oil.when i look at it,it seems to have two oil dipsticks.does the oil have a drain below the engine or do i have to tip it on the side to drain the oil?
Thank You Ben
      GREG

Answer
Greg
Run the engine for about 2 to 3 minutes to allow the oil to circulate and warm up so that it is less viscous and will flow more easily. Stop the engine and remove the spark plug wire.

If the fuel tank is less than about 1/3 full, then you will probably not have any problems, otherwise you will have to drain some gas or remove the fuel tank so that gas does not spill out of the breather hole in the cap.
If there is an oil drain plug, you can use this to drain the oil. However, it is usually more convenient to just turn the blower on its side, carburetor side up. This is usually acceptable for the short time that will be involved. Immediately check for any oil leakage - if there is any, we will need to avoid tipping the mower as much - look for the drain plug.

Wipe around the oil filler cap with a clean cloth or paper towel to remove the dirt and grime that has likely collected there. The oil filler will either be on or near the bottom of the engine or at the top of the shroud (Eager 1 type). If it is not right at the bottom, there will be a dipstick attached to it.

Place your wide mouthed drain pan under the oil filler cap and remove the cap. The oil will flow into your pan. Let it continue until the dripping stops - probably 10 minutes or so.

Set the blower upright on a level surface. Wipe any drips on the engine and shroud up with a clean rag or paper towel.

Use the recommended oil for your engine. SAE30 is usually specified by the engine manufacturer but they will usually state that 10W-30 or 10W-40 (SG rating) are acceptable substitutes. These 'multi-weight' oils are widely available and inexpensive. Typical small engine oil capacity is just over 1/2 quart. Start low and incrementally add oil until just below full on the dipstick or at the top of the oil fill hole if there is no dipstick. DO NOT overfill. Give it time for the relatively viscous oil to find its way into the crankcase. Tipping the blower back and forth a bit will help this process.

Replace the filler cap. Wipe up any additional drips.

Replace the spark plug wire. Then, start and run the engine for a couple of minutes. Wait a few minutes, then recheck the level. Top it off if needed.

Transfer the used oil from your drain pan to the storage container and dispose of it in an environmentally safe manner.