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Too true on the last point. Locally here in South Australia, there isn't too much choice in push mowers - I can either spend $800 on a Honda push mower, or $245 on a Sanli. I now own 3 Sanli push mowers, and the improvements in design and reliability between the oldest and newest is very...

This thread would have been a non starter if the OP had looked into the problem more closely. But it seems it is common to rush off to a forum with a problem (aka 'issue') and fire up the natives. And then the fun starts. Last time I posted on a lawnmower forum was to help someone else. Some...

It is spring loaded and is meant to move under centrifugal force, unless it is stuck. A commonly used decompressor mechanism, causing a common problem.

You found it, you just don't know what you are looking at. A finger rides on the taller cam that holds the intake open longer, thus dropping compression. Once the engine spins up, the finger pulls away and the rocker arm runs on the normal intake cam, giving full compression. The finger can...

From basic principles: Starter should have 2 connections to it. Big one on the starter body to the battery. Smaller one on the solenoid to your push button switch. Photo of starter connections will help, if I got this wrong.

That's an 8 thou feeler gauge, not 80. Maybe pull the piston and check for broken rings, and put new ones in even if not broken? The rings might just be stuck in the piston grooves. The engine looks tired, but should still be a runner.

Good you can buy rebore spares for that motor. Is it splash or forced lubrication in that engine? Can't see your updated pictures.

Have two Sanli mowers. Oldest around 5 or 6 years of age. Both cost me around AU $200. Don't really need anything better for the standard suburban quarter acre front and back lawns. I'd rather have two of these than one Honda. If the Sanli dies permanently after 7 years, no harm done. If a AU...

Not without the right test equipment, no. Try taking the plug out, opening the gap to twice normal, and see if you get a spark spinning up the engine with the plug resting outside the engine on some of the mower metal. I got a spark from the original coil with the plug out of the engine with the...

Sure. No problem with my mower, all fixed. And I wasn't looking for help with a problem. The general principle that I brought up applies to fault finding any small 4 stroke engine. If you have checked all the usual causes of not starting or running right, the coil is the next - and possibly last...

Good that you walked away from it. Or were allowed to.

Unless you can source a wiring diagram for the electrics and source the missing bits I'd give this one a miss as a hopeless case. Owner might want to hear why you don't want to tackle it, or if he insists, how much it is going to cost to rewire everything. And fix whatever else you find wrong.

I'd be tempted to store the new engine away and run this one on thicker oil, then use it until it breathes it's last. Rod out the side, type of thing. You might get a few more years out of it yet. That's what I tend to do anyway, best way to get your money's worth. I doubt if people recondition...

Checking valves for sealing without pulling them out: Spark plug in, set the head with combustion chamber horizontal, fill with water. If the level drops, look at where the water is coming out - in or out. That will tell you which valve is not sealing. Pull it, check face, seat. If not that, it...

Lawn mowers aren't too choosy on the oil they use. That Honda is going to run for 10 years or more, whatever oil you feed it, guaranteed. I'm in Australia too, and have owned several Victa mowers. Lots of torque when new, but when the rings wore you'd get blowby into the crank case which...

Great pictures. I've just rebuilt a Sanli lawn mower engine of the same size, and from the looks of it, the Chinese engine copied a lot of details from Honda. Did you open the case on that engine? I've worked out how the governor works, and how the decompressor works, but am wondering about...

I've just joined up to add to this thread. Old Sanli mower, with exactly the same symptoms. Starts on full choke, revs, then dies. Have done all of the checks, cleaned out carb, new plug, etc. No change. Stripped the motor down to basics, just to check for internal wear and see if the governor...