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I was wrong. electric start still not working.

#1

K

kevtron1

I have a b&s on my sears self propelled mower.

128M05-5468-F1. It's on a sears lawn mower the electric start was working fine until my daughter his a rock. Stopped it dead. Now the electric start won't turn the motor fast enough to start it. Battery is fully charged. I took the top off and the starter motor is turning the motor over. The mower starts on first pull or second pull pretty easy. this is the lawn mower​

917370441 . Any advise is greatly appreciated.​



#2

R

Rocky J

I am guessing the shock from the abrupt stop caused a poor connection between the battery and the starter. You might start at the battery + and - and remove them and sand paper everything then the other end of those two wires. Sometimes the ground they fasten the neg - cable to the body so you might also have to loosen the motor bolts enough to get the sand paper between the engine block and the frame. The engine is aluminum and the frame is steel so there is always a issue there with the heavy gray dust that does not conduct electricity very well if at all.


#3

R

Rivets

I’m betting that you will find a parcially sheared fly wheel key.


#4

K

kevtron1

Rocky J said:
I am guessing the shock from the abrupt stop caused a poor connection between the battery and the starter. You might start at the battery + and - and remove them and sand paper everything then the other end of those two wires. Sometimes the ground they fasten the neg - cable to the body so you might also have to loosen the motor bolts enough to get the sand paper between the engine block and the frame. The engine is aluminum and the frame is steel so there is always a issue there with the heavy gray dust that does not conduct electricity very well if at all.
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I'll check and clean all the connections. Thanks


#5

K

kevtron1

Rivets said:
I’m betting that you will find a parcially sheared fly wheel key.
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Is getting to the fly wheel hard? This sounds above my paygrade.lol Any idea what a lawn mower shop would or should charge?


#6

M

melvin1942

kevtron1 said:
I'll check and clean all the connections. Thanks
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#7

M

melvin1942

When you try to start it do you hear a click at the Solenoid? If you do not see if you can turn the blades by hand. if you cannot I would say you have a bent shaft.


#8

M

melvin1942

When you try to start it do you hear a click at the Solenoid? If you do not see if you can turn the blades by hand. if you cannot I would say you have a bent shaft.


#9

R

Rivets

That is the big question, as everyone is going to be different. Best to get on the phone and check with your local shops, as labor rates are different and it will also depend on how busy they are.


#10

S

slomo

Try google first or youtube. If you lack the wrenching jumbo, call a mower shop.
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#11

K

kevtron1

melvin1942 said:
When you try to start it do you hear a click at the Solenoid? If you do not see if you can turn the blades by hand. if you cannot I would say you have a bent shaft.
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I can turn the blade by hand and it starts on first or second pull . Prob start on first pull but I'm 66 and have a pulled muscle in my right shoulder, the one I pull start with. lol


#12

K

kevtron1

kevtron1 said:
I can turn the blade by hand and it starts on first or second pull . Prob start on first pull but I'm 66 and have a pulled muscle in my right shoulder, the one I pull start with. lol
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when I push the start button it turns the engine over. Just not fast enough to start it


#13

K

kevtron1

so today I'll pull the connections and battery and use some dialectric grease in them to see if I can improve the connections. the wires on the battery are soldered to it and lead to a molex connector. I'll also try to find the groundand sand that connection too. will advise


#14

K

kevtron1

kevtron1 said:
I'll check and clean all the connections. Thanks
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So you may have been right. I took all the connectors apart and put dielectric grease on them. then I took a car jumpstart battery and hooked it up and it fired up. Maybe hitting the rock jarred the connections and also the battery. Maybe a dead cell not giving enough amps or volts or something. Thanks for your help


#15

K

kevtron1

slomo said:
Try google first or youtube. If you lack the wrenching jumbo, call a mower shop.
View attachment 70647
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I took a look in at the flywheel and starter and didn't see any damage. as you can see it was the wiring / battery. Thanks for you help.


#16

K

kevtron1

kevtron1 said:
when I push the start button it turns the engine over. Just not fast enough to start it
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I have a feeling I broke a cell in the battery and it wasn't giving enough juice to the batter. Thanks for replying to the post.


#17

R

Rocky J

Keep in mind the charging system in that mower is probably 3 amp or less and starting it for 5 and 10 minute jobs will never keep up your battery. A cheap battery maintainer left on between uses would help a bunch.


#18

K

kevtron1

I saw a youtube video where a guy hooked up a harbor freight 12 volt tool battery to his mower.It fired his mower right up! I like the idea of being able to bring the battery in and put it on the charger . It comes with the charger too and is only 14.99. I'm really temped to try it.


#19

R

Rocky J

probably a better battery then the mower battery . I have noticed the warranty on most mower batteries is 90 days , I would just tarp strap the jump start pack to it, Elon said we need to cut back on wasteful spending


#20

S

slomo

Rocky J said:
Elon said we need to cut back on wasteful spending
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He has 200+ years of bloat to trim through. I would think he would need the entire US military to assist him. Every bill that comes up is full of bloat.


#21

K

kevtron1

Rocky J said:
probably a better battery then the mower battery . I have noticed the warranty on most mower batteries is 90 days , I would just tarp strap the jump start pack to it, Elon said we need to cut back on wasteful spending
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its an x-10 jump starter. About $180. I did see a youtube video where a guy bought a harbor freight 12 v tool batter by warrier for 15 buck with charger. I really like the idea of not having to have my lawn mower near and outlet to charge it. I could get a little plastic box to hold it and tarp strap that. LOL . I only with he would have said how many starts he got from the harbor freight battery.


#22

B

bentrim

Remove spark plug wire, turn mower on side -- with carburetor up -- very carefully watch the bolt in the center of the crankshaft, turn the blade, if it is not true and goes in a circle the crank is bent. Sometimes it is easier to have someone pull the startter rope while someone watches the crankshaft. You may also watch the ends of the blade and see if it passes the housing at the same place -- just don't try that with a bent blade.
I believe the crankshaft is bent and causing enough resistence the electric starter can't turn the engine over.


#23

kbowley

kbowley

Rocky J said:
Keep in mind the charging system in that mower is probably 3 amp or less and starting it for 5 and 10 minute jobs will never keep up your battery. A cheap battery maintainer left on between uses would help a bunch.
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There is no alternator on those; they need to be charged via the supplied charger as needed.


#24

A

Auto Doc's

First, I recommend you disconnect the spark plug, then lift the front and have a helper stand on the handle to keep it up. Inspect the blade for being badly bent on the outer end of one portion (it will be obvious if it is). If it is, not only is the blade bent, but the flywheel shear key will have failed.

Check out a site called Teryl fixes all, he is a bit of a character but knows mower repair very well.

Hopefully this mower did not bend the crankshaft end where the blade attaches, if it did, plan on getting a new mower.

Sorry, a shop will cost you a 1 hour "diagnostic charge" just to tell you it is beyond repair.


#25

kbowley

kbowley

If it starts with one or two pulls, then the issue is the electric starter or the battery, period. They are a PITA, add weight, and don't turn the engine fast enough unless they are fully charged with a good battery and starter. If you do not have access to the charger that came with the unit, purchase a .5 AMP "Battery Tender Junior" brand charger and leave it hooked up when not in use. Do not get a battery from Amazon, as they are all Chinese junk no matter the reviews. Purchase one from Napa. It is a 7 AH battery; bring it with you when you go to purchase a replacement.


#26

K

kevtron1

melvin1942 said:
When you try to start it do you hear a click at the Solenoid? If you do not see if you can turn the blades by hand. if you cannot I would say you have a bent shaft.
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I just checked the shaft and its straight. Not a bit out of round.


#27

K

kevtron1

So I did purchase a battery from husqquarn from amazon. My bad it didn't work. I have the charger that came with the unit. I charged it overnight before I used it but it didn't work to start the mower. Just my car jumper x10 starts it.


#28

kbowley

kbowley

kevtron1 said:
So I did purchase a battery from husqquarn from amazon. My bad it didn't work. I have the charger that came with the unit. I charged it overnight before I used it but it didn't work to start the mower. Just my car jumper x10 starts it.
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I told ya not to buy one from Amazon.


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