This video walks you through the process step by step, including checking your oil level, adding oil, and removing excess oil.
You’ll find useful resources on this page, tips, links to tools, parts, and supplies required to complete your repair. Engine oil for any engine is important, the quality and the quantity. Oil is critical because it cools and lubricates the internal components. Less oil means higher internal temperatures and when the temperatures get too high, the components fuse together. This is known as seizing and for an engine that’s as bad as the story gets.
But too much oil is bad also, most mower engines use a splash method of coating the internal components. A paddle strikes the surface of the oil and splashes it about. If the oil is too full, the paddle no longer splashes as it’s submerged in oil. To make matters worse, the submerged paddle aerates the oil which reduces its effectiveness.
It’s easy to overfill the oil, most mower engines only take (from empty) .65 quart (.61 lt.). Common symptoms of too much oil include oil leaks; no starts; white smoke; stiff pull cord. Too much oil needs to be removed and you’ll find an oil siphon on this page that makes removing oil look almost pleasurable.
Briggs & Stratton – Most models take from empty .65 US quarts (.6 lt.) 5W30 engine oil.
Honda engines – Most take from empty .58 US quarts (.55 lt.) of 10W30 engine oil.
Kawasaki engines – Most take from empty .6 US quarts (.6 lt.) 10W30 engine oil.
Kohler engines – Most take from empty .6 US quarts (.6 lt.) 10W30 engine oil.
For exact specs see:
Briggs and Stratton push mower engines
Briggs and Stratton tractor mower engines
Tools & Parts
To nail this procedure you may need the following tools, parts, and supplies.
Briggs & Stratton Engine Oil
Briggs & Stratton oil SAE30 is suitable for most Briggs & Stratton walk-behind mower engines. One container is plenty for an oil change (walk-behind mowers). Picture links to Amazon.com.
Honda Engine Oil
Genuine Honda 10W30 motor oil, specially formulated for Honda engines. Picture links to Amazon.com.
Gas & Oil Syphon
You’ll find this tool really useful if you need to drain the gas tank, and you will if the gas is stale. The siphon will remove it without fuss or mess and it can be used for extracting the oil too. Picture links to Amazon.com.
This is the first tool on the list for good reason, Wd solves a ton of problems. I won’t work without it, because I can’t. Picture links to Amazon.com.
Ratchet Tool Set
Before we can do anything, we’ll need tools. I’ve selected this set as I own some Craftsman tools and while I have worn some out, they did do a lot of work. So I expect this set will last the occasional user quite a long time. This set carries both metric and standard sockets and that’s important because some mowers will have both types of fastener sizes. Set includes spark plug sockets. Picture links to Amazon.com.
Mix this with the gas when winterizing your small engine. Gas isn’t what it used to be, it goes stale, in some cases after just one month. Bad gas causes gumming and that’s a carburetor killer. A stabilizer will save you money and stress in the long run. Picture links to Amazon.com.
Briggs and Stratton refuel can. These guys got it right, I like it a lot, it offers press button control, no fuss no mess and no funnel required. Picture links to Amazon.com.
I use a DeWalt screw gun (also a drill) in the workshop to speed up the process of removing engine covers, carburetor bolts, Armature bolts, etc. It’s a brushless motor and as tough as nails, I drove over it a few times – still works great! Batteries are interchangeable and so if you have a DeWalt product already you won’t need the battery. Picture links to Amazon.com.
- About the Author
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John Cunningham is an Automotive Technician and writer at Lawnmowerfixed.com.
He’s been a mechanic for over twenty-five years and shares his know-how and hands-on experience in our DIY repair guides.
Johns’s fluff-free How-to guides help homeowners fix lawnmowers, tractor mowers, chainsaws, leaf blowers, power washers, generators, snow blowers, and more.