LA 145

horse2292 · May 26, 2016

New carb,new battery from dealer. Cranked and ran fine. Came home and cut for 30-40 minutes then shut her down. Came back topped it off with fresh gas and want crank. Checked all the regular stuff. Then changed the spark plugs and fuel filter. With not fire at all. The plugs do have spark. The blades are not engaged. The gas cap is not clogged at the vent. Any other ideas?

Sysop · May 27, 2016

If there is no spark, replace the magneto. It resides under the top cover. Follow the plug wire.

DT86 · May 27, 2016

If you have spark then the problem is fuel related.

horse2292 · May 27, 2016

DT86 said:
If you have spark then the problem is fuel related.

the spark was there but not a good dark blue color.

horse2292 · May 27, 2016

DT86 said:
If you have spark then the problem is fuel related.

Fuel is getting to the carb. It want crank with starter fluid.

Sysop · May 27, 2016

If the spark isn't hot enough, it won't fire. New plug, new carb, fresh fuel, new battery; the magneto is the only thing left in the mix that wasn't changed. When the new battery was added, it had enough juice to create a hot enough spark to fire. Once fired for a moment, it created enough heat to continue running as the battery level went down, and once shut off and cooled, it no longer had the fresh battery charge to create a hot enough spark. Giving the battery a boost may let it fire up again, but this really sounds like a weak spark. Spark+Fuel don't always make fire. The spark needs to be hot enough to do the job. Also, high octane fuel needs a hotter spark than low octane fuel, so this could have added to the condition depending on the fuel that was in it, and the fresh fuel that was added.

horse2292 · May 28, 2016

Sysop said:
If the spark isn't hot enough, it won't fire. New plug, new carb, fresh fuel, new battery; the magneto is the only thing left in the mix that wasn't changed. When the new battery was added, it had enough juice to create a hot enough spark to fire. Once fired for a moment, it created enough heat to continue running as the battery level went down, and once shut off and cooled, it no longer had the fresh battery charge to create a hot enough spark. Giving the battery a boost may let it fire up again, but this really sounds like a weak spark. Spark+Fuel don't always make fire. The spark needs to be hot enough to do the job. Also, high octane fuel needs a hotter spark than low octane fuel, so this could have added to the condition depending on the fuel that was in it, and the fresh fuel that was added.

That makes since. I will try and find one today.

horse2292 · Jun 2, 2016

Okay bought 2 new magnito's and put them on. Set them like I was told. Same thing. Turning over and want crank. Pulled the fuel line to carb and it's getting fuel. I don't know. Ready to burn it!!!!!

Sysop said:
If the spark isn't hot enough, it won't fire. New plug, new carb, fresh fuel, new battery; the magneto is the only thing left in the mix that wasn't changed. When the new battery was added, it had enough juice to create a hot enough spark to fire. Once fired for a moment, it created enough heat to continue running as the battery level went down, and once shut off and cooled, it no longer had the fresh battery charge to create a hot enough spark. Giving the battery a boost may let it fire up again, but this really sounds like a weak spark. Spark+Fuel don't always make fire. The spark needs to be hot enough to do the job. Also, high octane fuel needs a hotter spark than low octane fuel, so this could have added to the condition depending on the fuel that was in it, and the fresh fuel that was added.

Richard001 · Jun 6, 2016

horse2292 said:
Okay bought 2 new magnito's and put them on. Set them like I was told. Same thing. Turning over and want crank. Pulled the fuel line to carb and it's getting fuel. I don't know. Ready to burn it!!!!!

horse,

What do you mean by: Turning over and want crank.

Do you mean that the starter spins the engine over but it doesn't start?

Have you checked compression?

Do your new coils give good spark?

After you try to start the engine, remove the spark plugs and see if there is fuel on them. If they are dry, then you are not getting fuel into the engine.