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John Deere A105 Want Start

#1

M

motard

My John Deere A105 riding lawn mower hums and then it will finally start just one time. Turn it off and it hums and will not start. I have changed the spark plug, gas filter, air filter, ignition switch, and solenoid switch, What is the problem?


#2

7394

7394

Welcome

What is the condition of the battery ?


#3

M

motard

I just put a brand new battery in the mower. It is fully charged.


#4

7394

7394

Battery cable lead ends clean & good ground ?


#5

M

motard

Yes I cleaned them.


#6

StarTech

StarTech

Assuming the OP has a LA105 Rider with a Briggs 31 series 19.5 hp OHV Intek engine.

Without being there it sounds the premament starter magnets have came unglued and are jamming the armature. There also the possibility that engine at/very near TDC compression stroke and the ACR is not working due either valves are way out adjustment or the camshaft ACR itself is broken off.


#7

M

motard

Once the engine starts, I can run it for 2 or three hours and it runs just prefect. It is if I start it and turn it off in 3 or 4 minutes, it hums and does not want to restart. Sometime I get lucky and it hums and restarts.


#8

M

motard

Is the humming the starter? Do you think I should replace the starter?


#9

Craftsman Garage

Craftsman Garage

You should.


#10

Hammermechanicman

Hammermechanicman

My John Deere A105 riding lawn mower hums and then it will finally start just one time. Turn it off and it hums and will not start.
What is the tune?


#11

Craftsman Garage

Craftsman Garage

Reminds me of a diesel with a glowplug buzzer


#12

S

slomo

My John Deere A105 riding lawn mower hums and then it will finally start just one time. Turn it off and it hums and will not start. I have changed the spark plug, gas filter, air filter, ignition switch, and solenoid switch, What is the problem?
Make a youtube video of it so we can see and hear what you are trying to describe.


#13

7394

7394

Yes..


#14

Craftsman Garage

Craftsman Garage



#15

B

bertsmobile1

Get some jumpers ( boosters to US )
Hook one to the + on the starter motor and the - to a good metal grounding place like the head .
Hook the +to the battery + then touch the - to the battery -
If the starter spins properly then remove the + lead and try again
Does not spin = bad ground lead or connections .

Starter des not spin with 2 jumpers = bad starter .


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