Push mower mods
 

Mowing faster saves time and gasoline. My used 6hp briggs and stratton flat head mower has plenty of power but it's discharge chute clogs up with tall grass and weeds too easy then the mower boggs down. That means slow down and allow the chute to clear.
Ain't nobody got time for that.
Before plasma cutter:
https://ecomodder.com/forum/attachme...1&d=1629930911
After plasma cutter:
https://ecomodder.com/forum/attachme...1&d=1629930911
If you have other people near by, it's probably not a good idea to make the discharge chute bigger.

Time for an upgrade to the wheels?

Nice work

I just bungee the flap up during “wet/long” grass and it blows grass everywhere and doesn’t clog as easily

My fathers antique 18hp Wheelhorse rider was actually bogging and clogging during the recent rainy season, lifted the flap but it still managed to bog down but no more clogs.

Well I took it out and ran it hard, by pulling it behind the riding mower, it blasts chopped weeds and grass out the side hard and far with no clogs.
It's got the big back wheels, usually the wheels get replaced and upgraded when a rock or peice of wood comes off the blade and takes out a wheel.

I also RTV'ed the paper air filter to the air cleaner since it eats a lot of dust.

Now I'm going to build a pack of lawn mowers to drag behisnd my riding mower.
I bought a 21 inch briggs and stratton ran with out oil and blown, I'm going to stick a 190cc 6.5hp engine on it. A 6.5hp with a 21 inch blade will be very tough to stall.
The others are that 6hp flat head and a 3hp flat head from the 1990s. The 3hp will over lap with the riding mower so it only has to eat a 12 to 14 inch wide strip of grass so it doesn't stall all the time.

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How much grass are you cutting ?


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17 acres of my own plus about 2 half acre lots.
I need to put some 4 legged grass cutters on there.

I found a blade adaptor that will allow me to use star pattern riding lawn mower blades on a push mower.. That's significant because riding mower blades have commercial versions that are very heavy and tungsten carbide crystal coated.
Typical push mower blades are thin, cheap and dull quickly from low alloy content. The carbide crystal commercial blades are self sharpening.

The muffler fell off so I fixed it.
https://ecomodder.com/forum/attachme...1&d=1662173621
All it needs is a flapper.

Better tune that with a couple elbows!

You know when the mower throws off mufflers it means the crank shaft is bent.
-mort

There's a special place in my heart for Wheel Horse

The blade was worn down and missing a chunk.
A fresh blade as brought it back into ballance.
Main reason for the zoomy style pipe is to I get breath lawn mower exhausted with the horizontal exhausted discharge. Any time I'm along the fence of up against the house I can smell it.

17 acres of lawn?
Isn’t it to big area for such a small mower

I have a tractor too

I would say the ridiculous zoomy pipe is definitely making the mower more resistant to bogging down.
I should do this to my 540cc single cylinder riding mower too.

https://external-content.duckduckgo....56c&ipo=images

Have you ever tried using Amsoil UCL in your mower gas? I've been using it with only E0 gas, and it did make a considerable difference for how long my tank lasted; for my lawn (that's probably a lot smaller,) I could nearly mow the whole place without filling up again. If I didn't use UCL, I'd need to re-fill once.

Then again, I was over-treating it at first, which gave a big puff of smoke when the mower started up. I'd put around a capful in 32 oz of gas. This also made it a bit more difficult to start the mower.

For a while now, though, I've been using 1 ounce in 4 gallons of fuel. The fuel doesn't last as long, so I was thinking of going down to 1 ounce for 3 gallons to see how that goes.

UCL should give a slight bit more power to the mower too, along side the E0 gas doing that too.

I was mowing the rental house and the push mower ran out of gas. I thought it was full, I guess not. So I filled it up with my 40:1 weed eater gas. The push mower really seems to like that 2 stroke gas. Think I might have to start using mostly weed eater gas then I can just carry the one gas can for both machines.

Afaik plug fouling is the only downside to 2 stroke fuel. The oil tends to improve compression

For those that don't know;
Why 2-stroke oil makes sense in single cylinder engines:

These single cylinder engines have a one way valve in the crankcase because a single piston would be pulling in and immediately pushing out a huge amount of air without one, robbing a lot of power from the engine.

So, viewed from inside the crankcase;
The engine pulls a large vacuum every time the piston moves up.
That's going to turn the exhaust and compression strokes into strokes that suck any oil that is gathered between and around the rings out, via the ring gaps etc.
That makes cylinder lubrication oil starved vs a 4 cylinder etc engine.


If you really want to mod a single cylinder engine:
Intake into sump via reed valve.
Exhaust that air to a intake manifold attached to the std intake valve, via another reed valve.
Now you get a supercharging effect as (ideally) 2 cylinders worth of intake are forced into the cylinder on every 4th (intake) stroke.

Challenges:

• The manifold needs to be a eg; cyclone separator to get most all the oil caught in the intake air, out and back into the sump via a one way valve.
• Fuel injection is a must.

I got a provisional patent on this idea back in my miss-spent, foolish youth.
This seems to have come of it:

https://www.youtube.com/watch?v=6bZ68QSpYCs

There's also a bit of research on this, but I wont bore you all with links to that! :)
It seems few here believe peer reviewed published research to be worth a damn anyway..?

Seems to? Don't they send you royalty checks? Did they wait 'til the patent expired?

A provisional patent lasts a year IIRC, in which you're supposed to get a full patent.

BMW's chief engine engineer told me this method was 'known'.
So ye; I wasn't the 1st to think of it. :o

Just a lot of time wasted making animations from CAD drawings back in the P1 computer days and learning to be a 'patent lawyer' when I should have been concentrating on my studies!
It cost a pretty penny too!

There was some excitement online about it and I think that may be why it ended up in a working engine.

Now if you can put the intake valves in the piston..!