Export thread

Near New 625 EX Won't Start - SOLVED

#1

Pimpy1

Pimpy1

Good spark. Sprayed starter fluid in carb and still not trying to start. Safety handle pulled and working correctly. Compression OK. Worked fine one week and next time I went to use I get nothing. What's next to try? Thanks in advance for any help.

CRAFTSMAN M220 150-cc 21-in Gas Push Lawn Mower with Briggs & Stratton Engine From Lowe's is the exact mower.​



#2

Scrubcadet10

Scrubcadet10

If it is still under warranty, don't touch it. you may void the warranty if you try to repair it on your own.


#3

Pimpy1

Pimpy1

Scrubcadet10 said:
If it is still under warranty, don't touch it. you may void the warranty if you try to repair it on your own.
Click to expand...
No longer under warranty.


#4

Scrubcadet10

Scrubcadet10

If you spraying starter fluid in the carb and it is still not firing, most likely you have no spark.
remove the top engine cover (blower housing) locate the ignition coil, you'll see it. there is a small black Kill wire hooked to a connector on the coil. Unplug that wire. reinstall the blower housing and try to start.
if it starts with that kill wire unplugged,the coil is being shorted to ground and killing any spark, most likely rubbed insulation on the wire or an issue with the Kill/Flywheel brake assembly.
If it DOES NOT start with that wire unplugged, the ignition coil is bad.

by the way, your profile picture keeps staring at me....:oops:


#5

Pimpy1

Pimpy1

Scrubcadet10 said:
If you spraying starter fluid in the carb and it is still not firing, most likely you have no spark.
remove the top engine cover (blower housing) locate the ignition coil, you'll see it. there is a small black Kill wire hooked to a connector on the coil. Unplug that wire. reinstall the blower housing and try to start.
if it starts with that kill wire unplugged,the coil is being shorted to ground and killing any spark, most likely rubbed insulation on the wire or an issue with the Kill/Flywheel brake assembly.
If it DOES NOT start with that wire unplugged, the ignition coil is bad.

by the way, your profile picture keeps staring at me....:oops:
Click to expand...
Will test. Thanks.


#6

Pimpy1

Pimpy1

Scrubcadet10 said:
If you spraying starter fluid in the carb and it is still not firing, most likely you have no spark.
remove the top engine cover (blower housing) locate the ignition coil, you'll see it. there is a small black Kill wire hooked to a connector on the coil. Unplug that wire. reinstall the blower housing and try to start.
if it starts with that kill wire unplugged,the coil is being shorted to ground and killing any spark, most likely rubbed insulation on the wire or an issue with the Kill/Flywheel brake assembly.
If it DOES NOT start with that wire unplugged, the ignition coil is bad.

by the way, your profile picture keeps staring at me....:oops:
Click to expand...
Unplugged and still nothing. When I pull out plug and pull I get a very strong spark with the plug resting against the mower. Could it still be the ignition coil if i get good spark? I tested with 2 plugs with same results.


#7

Scrubcadet10

Scrubcadet10

Ok, probably not the coil...
remove the spark plug, and spray some starting fluid right into the plug hole ,reinstall the plug & wire and try to start.


#8

Pimpy1

Pimpy1

Scrubcadet10 said:
Ok, probably not the coil...
remove the spark plug, and spray some starting fluid right into the plug hole ,reinstall the plug & wire and try to start.
Click to expand...
Still nothing. Sprayed on hole. Tried and not even one pop. Pulled plug again and it is sparking. I don't get it. Oil level is good just in case there was a oil level kill switch.


#9

Scrubcadet10

Scrubcadet10

hmmm,
it could be as simple as a bad spark plug... sometimes the plug will spark outside the engine, but it won't overcome the high compression pressures in the cylinder.
I also wonder if it could be a valve problem, i.e., intake valve not opening, possibly.


#10

Pimpy1

Pimpy1

Scrubcadet10 said:
hmmm,
it could be as simple as a bad spark plug... sometimes the plug will spark outside the engine, but it won't overcome the high compression pressures in the cylinder.
I also wonder if it could be a valve problem, i.e., intake valve not opening, possibly.
Click to expand...
Tried two plugs. Same results. Will check the valves next. I just adjusted the valves on an old t1000 riding mower. Compression was fine at 45 or 50 I think. Thanks for throwing ideas out there.


#11

StarTech

StarTech

Or it could be a sheared flywheel key since this is a bar blade walk behind mower.


#12

Pimpy1

Pimpy1

StarTech said:
Or it could be a sheared flywheel key since this is a bar blade walk behind mower.
Click to expand...
I doubt it as it worked fine before I put it away. Maybe though. I never hit anything. The blade spins freely and no play with the fan on top. Not a mark on the cutting blades. I would check but I don't have a 21mm socket or which ever one fits it. If it can get one I will check though. Thank for the tip.


#13

StarTech

StarTech

Some blade impacts don't leave a mark. But the sheared key is just a thought.


#14

Pimpy1

Pimpy1

StarTech said:
Some blade impacts don't leave a mark. But the sheared key is just a thought.
Click to expand...
Would you know the socket size. I can't find it with google. The part is 690662 Looks close the 21mm but just a guess.


#15

S

slomo

Remove the dipstick and smell for fuel in the oil. Wondering if the carb is dumping fuel flooding the cylinder causing hard starts.

Sounds like you have spark. Is it a strong blue or does is fire off as orange? Have to check this in the dark. Orange is a weak coil or poorly grounded coil.

slomo


#16

Pimpy1

Pimpy1

slomo said:
Remove the dipstick and smell for fuel in the oil. Wondering if the carb is dumping fuel flooding the cylinder causing hard starts.

Sounds like you have spark. Is it a strong blue or does is fire off as orange? Have to check this in the dark. Orange is a weak coil or poorly grounded coil.

slomo
Click to expand...
No smell of gas in oil. The spark is bright white/blue and can be see fine outside in the light. Plug is not wet when I pull it out. I turned it over quite a few times with plug out to check for flooding. I even cleaned to threads well to make sure the plug grounded. Tried spraying started fluid into the carb and also tried spraying into cylinder. Nothing. I don't even get it to pop or make any sounds of tying to start. I just don't get how I can have a good spark but no attempt to start with fluid.


#17

S

slomo

How about compression and a valve adjustment?

Air filter plugged? Will it run minus the air filter?

Vacuum leaks? Spray something flammable around the carb intake. See if the revs change. Guess it's hard to check for this since it won't start.

Remove the flywheel. Remove the key for said flywheel. Clean the crank end. What now do you have? All parts good?

So are you saying with an inline spark tester, you get "good" spark every time you pull the rope?

Go back to the big 4, air, fuel, spark and compression.

slomo


#18

Pimpy1

Pimpy1

Fixed. Problem was valve rocker arm was bent. It would lock up on other valve and cause not enough compression to start mower. Fires right up and runs like new again now. Thanks for all the help from everybody.


Footer Links 1

Top