ESE's works engine tuner

[diesel pig]

https://sesdirect.co.nz/collections/...e-short-body-1

I found the long body fitted better on my Husqvarna bike but each to there own.

[TZ350]

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Looks like the piston has been tapping the insert. Skimmed about 0.004" of the face of the squish.



Pleased to see the plug thread cooling fins look like they have had water passing between them.

[pete376403]

I found the long body fitted better on my Husqvarna bike but each to there own.

It was more to dirt jbiplane towards Victa mowers, which may be uncommon in Russia

[Niels Abildgaard]

https://sesdirect.co.nz/collections/...e-short-body-1

How does it work and how many seconds to open again after a failed try?

[diesel pig]

How does it work and how many seconds to open again after a failed try?

the black plastic fitting on top of it is for a vacuum line and work's like a vacuum operated fuel tap but the other way around no vacuum(motor not running) it's open and no compression. Vacuum (motor running) it's closed and has compression.

[Niels Abildgaard]

the black plastic fitting on top of it is for a vacuum line and work's like a vacuum operated fuel tap but the other way around no vacuum(motor not running) it's open and no compression. Vacuum (motor running) it's closed and has compression.

Thank You for explanation of the obvious.
Way smarter than using compression through a one way valve.

[Frits Overmars]

the black plastic fitting on top of it is for a vacuum line and work's like a vacuum operated fuel tap but the other way around no vacuum(motor not running) it's open and no compression. Vacuum (motor running) it's closed and has compression.

So when the engine is not running, the valve is open. Then how do you generate enough vacuum to close the valve?

[jato]

Even though those Victas were australian they were keen to work ... so partial compression was enough for them to start and once running the small volume on one side of the diaphragm had its pressure drawn down by the vacuum line going to the downstream side of its (quite small) carb

[Niels Abildgaard]

So when the engine is not running, the valve is open. Then how do you generate enough vacuum to close the valve?

For the benefit of all mankind:
Can someone from down under, make or point to a video showing start of a Victa lawn mower?

[jato]

The girlfriend has offered to start the lawnmower here but i don't know how to work the video recorder ... sorry mankind

[diesel pig]

So when the engine is not running, the valve is open. Then how do you generate enough vacuum to close the valve?

The valve is tiny, so if you turn over the motor fast enough (like when you kickstart a dirt bike) all the air in the cylinder can't get out of the cylinder before it sparks. So it does have some compression but more like if you left out the compression ring when rebuilding a motor. It makes starting big bore 2 strokes easy.

[diesel pig]

For the benefit of all mankind:
Can someone from down under, make or point to a video showing start of a Victa lawn mower?

Amazing enough there is web site that has old Victa 2 stroke mowers on it. I saw it when setting up my Husqarna. Husaberg it's your time to shine!

[diesel pig]

Even though those Victas were australian they were keen to work ... so partial compression was enough for them to start and once running the small volume on one side of the diaphragm had its pressure drawn down by the vacuum line going to the downstream side of its (quite small) carb

How embarrassing, I was so busy tapping out a reply I didn't see your better reply.

[Pursang]

I've got a 500 Maico Enduro in the workshop. The decompressor for those is a manual valve about 1/2 way up the back wall of the cylinder, rather than in the head.
So it's more like starting a 300 rather than the full 490cc. Once started, it will run happily, but noisily, with the valve held open.

[jbiplane]

Thank all peoples for decompresion valve ideas!!!
I own 8 CNC machines and will try make automatic decompression valve.
For me easier make than buy.