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Troy Bilt wont start

#1

D

Dav H

I have a TroyBilt 21" self propelled push mower and it will not start. I bought it new because I got a deal. I cranked it when I got it and it run great. I already had 2 other mowers so I stored this one for several years. I got it out today and it wouldn't crank. I filled it with gas. I cleaned the carb. I checked the flywheel and coil and they were clean. It is getting fire and gas but will not start. Any suggestions.


#2

Scrubcadet10

Scrubcadet10

Could post the engine model number?
There is a thread pinned in the New Members section to help you find the mower model number.


#3

S

slomo

Did you clean the inside of the carburetor? Sorry had to inquire...... We've all seen it all on here.

Most likely a plugged carb from sitting with stale gas for years.

I would pull the fuel line AT the carb verifying good fuel flow TO the carb. Drain into a glass jar.


#4

D

Dav H

slomo said:
Did you clean the inside of the carburetor? Sorry had to inquire...... We've all seen it all on here.

Most likely a plugged carb from sitting with stale gas for years.

I would pull the fuel line AT the carb verifying good fuel flow TO the carb. Drain into a glass jar.
Click to expand...
I cleaned carb and the fuel line is clear. I was thinking maybe a valve could be stuck.


#5

S

slomo

Dav H said:
I cleaned carb and the fuel line is clear. I was thinking maybe a valve could be stuck.
Click to expand...
Did you blow the carb out both ways with an air compressor while cleaning? Or just spray some cleaner and call it good?

This is definitely a carb or fuel delivery issue. Discounting any mice chewing on the plug wire?? Was a new mower that was stored for years. Clean and flush out the fuel tank.

Again make sure you have good fuel flow AT the carb.

If the carb is clean, air filter is good and you have spark, this should be a runner.

Take an old spark plug. Gap to 1/4" wide. Ground plug to engine. Pull the rope. Should have a nice blue spark. Check this out and report back.


#6

S

slomo

Scrubcadet10 said:
Could post the engine model number?
There is a thread pinned in the New Members section to help you find the mower model number.
Click to expand...
Amen


#7

B

bertsmobile1

With engines that have sat for a long while with fuel in the carb, usually there will be varnish deposits everywhere clogging up the fine passages .
The other thing that happens is valves stick open or an open valve gets some corrosion on the seat preventing it closing properly.
and the oil drains completely from the rings so there is no seal.
So start by pouring a teaspoon of oil down the plug hole then let it sit for a few minutes , rock the cylinder back & forth a few times then give the engine a couple of slow pulls , with a dud plug in and a couple of quick pulls plug out to expell the excess oil .
The general diagnosis proceedure is to get a can of carb spray cleaner
1) squirt a very small amount down the plug hole. replace the spark plug and give the engine a pull
I always use a known good plug for this, often warmed up in another engine first .
Engine goes bang = timing is OK & valves are closed
Goes bang out the muffler =open exhaust
goes bang out the carb = open inlet

2) depending upon the results do the same down the carb throat


#8

D

Dav H

bertsmobile1 said:
With engines that have sat for a long while with fuel in the carb, usually there will be varnish deposits everywhere clogging up the fine passages .
The other thing that happens is valves stick open or an open valve gets some corrosion on the seat preventing it closing properly.
and the oil drains completely from the rings so there is no seal.
So start by pouring a teaspoon of oil down the plug hole then let it sit for a few minutes , rock the cylinder back & forth a few times then give the engine a couple of slow pulls , with a dud plug in and a couple of quick pulls plug out to expell the excess oil .
The general diagnosis proceedure is to get a can of carb spray cleaner
1) squirt a very small amount down the plug hole. replace the spark plug and give the engine a pull
I always use a known good plug for this, often warmed up in another engine first .
Engine goes bang = timing is OK & valves are closed
Goes bang out the muffler =open exhaust
goes bang out the carb = open inlet

2) depending upon the results do the same down the carb throat
Click to expand...
Thank you, I will try that tomorrow.


#9

H

hlw49

Just take air filter off and squirt a little gum out carb cleaner in the throat of the carb. and pull it over to see if it will start. Starts carb, don't start fire or compression could be a plug though.


#10

peteco

peteco

Spark plug bad, check spark. Try take out the coil, clean seats for good ground, adjusted at distance to flywheel (card method is good), check spark again.


#11

H

Hoptoit62

peteco said:
Spark plug bad, check spark. Try take out the coil, clean seats for good ground, adjusted at distance to flywheel (card method is good), check spark again.
Click to expand...
If it's a troybilt tiller (chicken scratcher)Lol. I had 2 of them. The coils are notorious to spark and then next time no spark. In the spring and summer I had garden for a few years and it's the carb. Had to clean it a couple of times. Just to small.


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