Lawn mower question. ;-)

[JRobyn]

I've seen this behavior with a mower with a resistor-type plug. Evidently they can be less sparky when hot and old. Come to think of it, I am less sparky when I am hot and I am definitely old.

If yours has this issue, it is a cheap and easy thing to try. NGK plugs seem to work best for me.

- Jay

 

[hunt4570]

So cut the fuel line, snip off a short section, go to local lawn mower shop and get a fuel filter with ends that fit your fuel line inside diameter and two hose clamps and install the filter with the tiny arrow facing the carb.
Still do the Marvel Mystery oil thing as suggested, and you're good to go. Since you're not sure of the last 'tune-up' decade, change out the spark plug too, and maybe do an oil change while you're at it, including the oil filter if it has one. Keep a record on the wall of when you did what for future reference.

Well, an in line filter might not be a bad idea, but not causing the problem right now. As far as the rest of that stuff, it gets an oil change every year, always has. new plug and air filter this year (no oil filter)... just don't know about points and such, when they were done last.

Have to wait till I get to town this weekend to pick up marvel mystery oil though. What does it do, or is that the mystery? ;-)

 

[hunt4570]

Have you tried using an inline spark tester when the engine is cold, and comparing the strength of the spark to when it is hot and won't start? The style I like to use on small engines look like this- https://www.stens.com/752-329-inline-spark-tester

If the magneto/coil is getting weak and starting to fail, they usually fail when hot.

I'll look into it, thanks.

 

[hunt4570]

What is the model number of the motor?

Model :196707
Type : 0141 0.1
Code : 9405231A (serial # maybe)

 

[hunt4570]

Cleaned everything up this morning, took off the shroud and cleaned the fins (BAD) , generously sprayed with carb cleaner (fins,carb,and anywhere else I could reach).
Put it back together, started right up.. mowed for about and hour, turned it off, let it sit about 10 minutes... and wont start. I was hoping cleaning it out would help as it should run cooler now.. but alas no.. no change.

 

[Quebecguy]

I just checked the Briggs & Stratton parts manual (on line) for Model 196707-0141 and it shows an in-line fuel filter Part Number 298090

 

[hunt4570]

I just checked the Briggs & Stratton parts manual (on line) for Model 196707-0141 and it shows an in-line fuel filter Part Number 298090

Well that could be, but its not the case here.

 

[hunt4570]

Have you tried using an inline spark tester when the engine is cold, and comparing the strength of the spark to when it is hot and won't start? The style I like to use on small engines look like this- https://www.stens.com/752-329-inline-spark-tester

If the magneto/coil is getting weak and starting to fail, they usually fail when hot.

Spark tester question.. does it mater if its for a small engine... car...tractor? Are they all created the same?

 

[crazyal]

Off the top of my head I would say it's either spark, fuel, or compression. Do you use the choke when warm? If not I would try it at full and half choke for a couple of pulls. I would even pull the plug and see if it looks wet. Wet would be a sign that either spark or compression is your problem. If it's dry then it's most likely fuel is your problem.