Lawnmower problem

[Grizzly Adams]

Looking for some advice, certain I'll find it here. I have a Craftsman riding mower with a 13.5 Briggs and Stratton Gold engine. It runs fine for a few minutes, till it warms up , I assume, then shuts down. I just changed the oil and put 10/30 in it. I'm wondering if the oil thins sufficiently to trigger the low oil shut down. 30 weight oil was suggested as a warm weather alternative. Didn't seem to do it before I changed the oil and I don't want to change it again if I can help it .

Grizz

[ghostguy6]

What oil did your mower originally call for? Did you overfill it? If you overfill it your crankshaft could be stirring the oil adding air, this turns the oil into an espresso foam like consistency which would cause a low oil pressure at the sensor.

[elkhunter11]

10w30 flows like 10 weight oil when cold, but like 30weight oil when warm, so at operating temperature 10w30, and 30 oil, are the same viscosity.

[steyrman]

Do you have any spark? sounds like a possible coil issue, cracked etc., they are fine when cold and then short out when they heat up.You could bypass the oil sensor then crank it over to see if you have any spark.

[Stinky Buffalo]

I'm with steyrman - check the coil first. Also ensure your fuel vent is working properly...

[gtr]

Originally Posted by Grizzly Adams

Looking for some advice, certain I'll find it here. I have a Craftsman riding mower with a 13.5 Briggs and Stratton Gold engine. It runs fine for a few minutes, till it warms up , I assume, then shuts down. I just changed the oil and put 10/30 in it. I'm wondering if the oil thins sufficiently to trigger the low oil shut down. 30 weight oil was suggested as a warm weather alternative. Didn't seem to do it before I changed the oil and I don't want to change it again if I can help it .

Grizz

I would check for spark, when it shuts down. 30 weight oil is thicker than your multi grade 10-30 when it is at operating temp. If that is all you changed, and it was functioning fine before, it would seem that could be the issue.

[FishOutOfWater]

Sounds like a carb issue... Like the float bowl isn't filling at the proper rate.

[mac1983]

I had the same problem once, run for awhile then die. Checked everything all fine, it would still die. Looked in the gas tank and fished out a well preserved Bumblebee, problem solved.

[elkhunter11]

Could be a plugged fuel tank vent, or a coil issue.

[RandyBoBandy]

You should probably disconnect the battery cables and touch them together and then hook them back up

[reddeerguy2015]

Love small engine threads... I have the answer....

Add seafoam... BAM!!!! FIXED!!!!

[Xbolt7mm]

Originally Posted by FishOutOfWater

Sounds like a carb issue... Like the float bowl isn't filling at the proper rate.

Float bowl fills the same cold as it does warm

[Xbolt7mm]

Originally Posted by elkhunter11

10w30 flows like 10 weight oil when cold, but like 30weight oil when warm, so at operating temperature 10w30, and 30 oil, are the same viscosity.

Yup

[Xbolt7mm]

Originally Posted by gtr

I would check for spark, when it shuts down. 30 weight oil is thicker than your multi grade 10-30 when it is at operating temp. If that is all you changed, and it was functioning fine before, it would seem that could be the issue.

Nope

[Xbolt7mm]

Originally Posted by Grizzly Adams

Looking for some advice, certain I'll find it here. I have a Craftsman riding mower with a 13.5 Briggs and Stratton Gold engine. It runs fine for a few minutes, till it warms up , I assume, then shuts down. I just changed the oil and put 10/30 in it. I'm wondering if the oil thins sufficiently to trigger the low oil shut down. 30 weight oil was suggested as a warm weather alternative. Didn't seem to do it before I changed the oil and I don't want to change it again if I can help it .

Grizz

Spark is likely the issue, put a Bosch plug in it, if your not moving when it warms up and quits then fuel issues are doubtful but, change the plug, change the fuel, , dump out the tank, clean the bowl, your oil is fine if the level is right, if it continues then look for a grounding kill switch wire that has rubbed through, lastly the coil. Or maybe a bad safety switch on your seat.

[CaberTosser]

Give it a rub down with a salve made of essential oils, try oil of oregano and some ground hibiscus flower. Following this tent it with banana leaves and run a vaporizer with clove oil into that for a fortnight. Align it’s Chakra’s and put a tea light candle into a Himalayan salt lamp while reciting some Tibetan poetry from the seat of your touring unicycle.







Or maybe check the ignition coil for a short that only occurs once it’s warmed up

[Reeves1]

[Xbolt7mm]

Originally Posted by CaberTosser

Give it a rub down with a salve made of essential oils, try oil of oregano and some ground hibiscus flower. Following this tent it with banana leaves and run a vaporizer with clove oil into that for a fortnight. Align it’s Chakra’s and put a tea light candle into a Himalayan salt lamp while reciting some Tibetan poetry from the seat of your touring unicycle.







Or maybe check the ignition coil for a short that only occurs once it’s warmed up

Medicinal marijuana

[Blaster]

Can you keep it running with the choke on partially or full when it's warm if so, your carb is in need of a good cleaning, and it's likely full of varnish. Remove it, take it ALL apart and clean it, OR go buy a new one. There's a good chance a replacement is fairly cheap.

[Kim473]

All most sounds like a vapor lock problem. When you changed the oil did you play with the gas line and possibly move it closer to the engine ? When it gets hot it produces a vapor lock. I would check that the gas line is not close to any hot engine parts and add seafoam to the gas. Seafoam will cure any varnish problems in the carb, if that is the cause. Then check other things if that does not cure the problem. Start with the cheapest and easiest things first.

Let us know the solution to the problem when you get it fixed.

[MountainTi]

Originally Posted by reddeerguy2015

Love small engine threads... I have the answer....

Add seafoam... BAM!!!! FIXED!!!!

[Grizzly Adams]

Originally Posted by CaberTosser

Give it a rub down with a salve made of essential oils, try oil of oregano and some ground hibiscus flower. Following this tent it with banana leaves and run a vaporizer with clove oil into that for a fortnight. Align it’s Chakra’s and put a tea light candle into a Himalayan salt lamp while reciting some Tibetan poetry from the seat of your touring unicycle.







Or maybe check the ignition coil for a short that only occurs once it’s warmed up

I like this. Coil sounds plausible.

Grizz

[man of steel]

Try take the fuel cap off when this happens and see if it starts. I had the same problem intermittently with a Craftsman lawn tractor. Took a long time to figure it out. It turns out that the new style gas caps that prevent gas fumes from polluting the environment are susceptible to having the valves stick and cause a vacuum in the gas tank.

[liar]

Originally Posted by man of steel

Try take the fuel cap off when this happens and see if it starts. I had the same problem intermittently with a Craftsman lawn tractor. Took a long time to figure it out. It turns out that the new style gas caps that prevent gas fumes from polluting the environment are susceptible to having the valves stick and cause a vacuum in the gas tank.

this

[Grizzly Adams]

Originally Posted by liar

this

Tried that, previous mower did that. Leaning towards the coil issue, they do that on occasion.

Grizz