Engine knock need help (video)

[jonpmattox17]

I was at idle switching implements when I went to lift the 3point the motor sounded like it was running out of fuel. I got fuel in it then began the priming process. After talking with dealer I was unable to get it to run again. Later that night I got it to stay running but hard knock. Not sure if it's injectors or bottom end.

 

[dodge man]

Did it run out of fuel? Plenty of oil in it? I’m not sure if your tractor needs each individual injector led or not. It’s obviously got a miss listening to your video.

 

[thepumpguysc]

With smoke like that, I’d say injector..
Just loosen each line and retighten until u get to the one that makes no difference..
It could be a stuck plunger in the pump also..
To check that, remove all the lines AT THE INJECTORS and spin the engine over while watching the squirt.. a stuck plunger won’t be pumping like the rest..
Good luck

 

[rScotty]

One cylinder is not firing....probably not getting fuel. That noise is a combination of normal clearances fromm the bottom end, wrist pin and piston slap. You hear it because you don't have the back pressure of combustion in that cylinder. If you don't run like that too long it will be OK.

Like the pump guy says, the fuel is being blocked in either the injector pump or in one of the injectors. Probably from crud. Both pump and injectors have plungers. Do the test he suggest first. Cross your fingers...if fuel squirts out the pump in equal streams, it is probably an injector. You can swap injectors to find which one it is. That will probably mean buying a cheap injector puller and injector seal washers. Both are very available for that Yanmar engne.

On the other hand, if it is the pump making unequal streams, then I would stop right then and PM the pump guy.
Scotty