LX 255 stalling

[bertsmobile1]

The impulse line is a tube that connects the crankcase to the fuel pump.
as the piston rises & falls you get pressure variations so the line blows then sucks.
The blow/suck/blow/suck is used to power the diaphragm to pump the fuel.

As for why the time, a mystery of nature.
The crud is floating around in the tank and gets sucked into the outlet tube much like hair getting sucked down the bath drain.
Bad news is if it is floating debris, it will be a tank out, and multiple washes,
Buy a length of fuel line and replace the lot from tank to carb while it is out because crud ca also get stuck on the inner wall of the tube.

 

[Bob1944]

I found a link about draining the tank, and it calls for removing the fender/deck. I started to do that but got nervous when I saw that the forward pedal and reverse Pedal appear to lift right off with the deck. Before going any further I am wondering how can that be, or more to the point, how does it go back together again? Do the pedal mechanisms just sit down into something? :confused2:

 

[bertsmobile1]

One bolt each and the pedals come off.
From memory they are different sized bolts and have different ends but this is exactly the reason why digital cameras were invented and why they put one in your phone.
Bet you thought it was to take funny pictures of your cat didn't you :laughing:
If yours is the one piece floor & fender then you will find a second pair of hands very helpful.

 

[Bob1944]

Thanks, got pedals off, deck off and tank out! Emptied tank into bucket and saw lots of small crud plus a maple leaf so I think you nailed it!

Washed out tank and new fuel line arrives Sunday. Hopefully that will do it.

Thanks again for all of your help!

 

[bertsmobile1]

Confession time.
The land lord got a 2000 series Cub and it is a brilliant mower, but used to stop after a period from 1/2 to 1 hour.
We faffed around with it for over 2 years, took the side covers off so the engine could get more air, changed magnetos , fuel pump, fuel filters , fuel lines, carb, fuel cap relays .
After a while, they just lived with it and when it stopped they took a break .
There were a lot of 2000 series Cubs for sale with a "hot running problem "
By chance the fuel line was pulled off and nothing came out so No 1 son blew backwards up the line and we all got a petrol shower.
Penny dropped
Off came the tank and it was chokers full of grass clippings that sort of floated around inside the tank.
After a clean up ran for hours till the PTO clutch overheated so he bought 2 more " problem" mowers.
In the mean time I bought the repair run and seeing the price used 2000's in good nick went for bought 15 in the first year , cleaned out the tanks and I now have 15 very happy customers with good used Cubs

Get some good light and have a close look at the inside of the outlet spiggot.
Several of these Cubs had a casting flash almost blocking off the outlet before you even start with debris.