After 1/2 hr motr loses powr sounds fluded.I keep mowing it may/not clear up.I've chang plugs, used hi grd gas & chang gas flter w/o mprvmnt.Hlp me w/problem/ has been issue lst sumer& agn ths yr

You know the old adage, Keep it simple, lol.

I was mowing along on my LA145, which had about 200 hours on it, and it slowed down then died. Before it died, it was acting like it was losing power. It felt like it was only firing on one cylinder. I waited a bit and it restarted after a lot of cranking. I made a couple mowing passes, and then the same thing happened.

Because I have mowed commercially for many years, I know my equipment inside and out. This mower was in top running condition and should not have been acting this way. There were no engine misses, no backfires and it was not normally hard to start. I knew the carburetor was clean, the coils were good, and the plugs were new. The fuel filter was recently changed. I got off, lifted the hood and gave a general inspection of the engine compartment. I noticed the fuel filter was nearly empty. I pulled the hose off the tank side of the filter and saw there was no flow.

The gas should gravity flow from the tank to the filter, if the tank has a good supply of fuel. Not that I recommend this practice, but I have no problem with doing it myself....I wiped the hose off and blew air back into the fuel tank. It helps to take the gas tank lid off first. After I got a good flow of air going back into the tank (it required several lungs full of air, you can hear the bubbles) the fuel began to gravity flow back through the hose at a decent clip. This fixed the problem. There is likely silt build up in the tank and it settles at the output port blocking the flow of fuel.

The problem repeated itself several times last summer. Back at the shop, I used compressed air to blow the line clear. The problem has not shown up in quite some time.

Hi there have u tryed taking the spark plugs out and giving them a clean?

Hi, run a number drill through the main jet. Even though you have carby cleaned it a thin layer of residue will remain on the walls of the jet. The problem you have is a lean misfire. Regards Phil.

I suggest you use an OBDI code reader.

try running it with the gas cap loose the vent might be plugged

Check the fuel pressure under a load, it should be between 44-48 PSI

Hi sounds like a coil pack a common prob for these

heat related problem, probably needs the valves adjusted. When the engine gets hot the valve clearances change

heck power on both sides of brake light switch with pedal depressed.if power on 1 side only replace brake light switch.if no power to brake light switch check turn signal switch.

It may need a tuneup or ignition module replaced. Check the air filter, spark plug.
Good Day.