What goes on inside a 4 stroke engine.

[gsx600racer]

I think something similar has been posted before, but not in slow motion.  Enjoy.





I will add this. On the smaller displacement B&S engines, the spark plug is located between the valves and piston.




The larger displacement flat head the plug location is shown in the vid.(near or over the intake valve)




For the 2 stroke fans, I think this was posted before...



This would also be cool to see in slow motion.

[90GTVert]

I like that the gasoline section shows that it's not an explosion that ignites the entire mass instantaneously as some think of it, but you can see the flame front travel across the cylinder. The acetylene (low dose) shows mixture motion better. Cool stuff!

[humanshield]

Hadn't seen that one. Awesome!

[Deleted]

Very cool. Interesting to note the spark fires on every rotation of the crank just like my scoot engine. I had seen other vids of this engine but not this one in slow motion. Very educational indeed. Also, it makes you think of what is going on when you crank up to over 8,000 rpm!!! Thanks for finding this.

Bill

[gsx600racer]

Jan 16, 2017 10:42:50 GMT -5 PirateLabs said:

Very cool. Interesting to note the spark fires on every rotation of the crank just like my scoot engine. I had seen other vids of this engine but not this one in slow motion. Very educational indeed. Also, it makes you think of what is going on when you crank up to over 8,000 rpm!!! Thanks for finding this.

Bill

I believe its called "wasted spark system" This is why its important to keep up on your plug maintenance. Although its only being used every other stroke, its firing every full rotation. 


Just wrap your head around a 2 stroke buzzing at 11-12k rpm and firing on every stroke. That's the vid I want to see.(in slow motion of course)

 
It is amazing how far we have evolved from the first steam engine to now. 

[gsx600racer]

I think where the engine was being flooded with rubbing alcohol and it still ran was insane. It basically went from and engine to a fluid pump.

For those that love flooding their engines with starting fluid to get them to run, you can see in the vid how the rubbing alcohol was washing the cylinder clean of any upper engine lubrication. In the long term starter fluid is capable of doing the same.

[Deleted]

Jan 16, 2017 17:23:39 GMT -5 gsx600racer said:

I think where the engine was being flooded with rubbing alcohol and it still ran was insane. It basically went from and engine to a fluid pump.

For those that love flooding their engines with starting fluid to get them to run, you can see in the vid how the rubbing alcohol was washing the cylinder clean of any upper engine lubrication. In the long term starter fluid is capable of doing the same.

So is too much gasoline.  We used to clean oil off of our parts with gas so...like you said, not doing the cylinder wall or the rings any good.

Bill

[gsx600racer]

Jan 16, 2017 18:13:35 GMT -5 PirateLabs said:

Jan 16, 2017 17:23:39 GMT -5 gsx600racer said:

I think where the engine was being flooded with rubbing alcohol and it still ran was insane. It basically went from and engine to a fluid pump.

For those that love flooding their engines with starting fluid to get them to run, you can see in the vid how the rubbing alcohol was washing the cylinder clean of any upper engine lubrication. In the long term starter fluid is capable of doing the same.

So is too much gasoline.  We used to clean oil off of our parts with gas so...like you said, not doing the cylinder wall or the rings any good.

Bill

Well said. A stuck float will flood the cylinder with fuel, passing past the rings and dumping into the crankcase thinning the oil. When this happens, I usually spray engine fogger and work it in some before starting. It might be smokey at first, but your engine will thank you in the long run. 

I have/use a squirt bottle that has premix in it for priming and starting engines for both 2 & 4 stroke engines. 

[Senna1Rossi]

that's cool.

But more importantly, did Scotty actually give oot the real formula for Clear Aluminum??? what??

[Deleted]

Jan 17, 2017 14:09:00 GMT -5 Senna1Rossi said:

that's cool.

But more importantly, did Scotty actually give oot the real formula for Clear Aluminum??? what??

Yes, he went back in time and gave it to those materials engineers so they could build the whale containment tank.  I guess the patent has run out on transparent aluminum so anyone can use it, ha ha.

Bill

[Senna1Rossi]

Bill, you're brilliant!