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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 13581
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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My Lawnmower engine start, and runs, fine when using the pull

Customer Question

My Lawnmower engine start, and runs, fine when using the pull cord to start it. When using the battery start the engine cranks OK but will not start.
Please can you tell me where the problem might be. Thanks in advance.
Submitted: 2 years ago.
Category: Small Engine
Expert:  Curtis B. replied 2 years ago.
Welcome to JUST ANSWER small engines, let me try to help you !! Do a spark test . Remove the spark plug and with it grounded to the metal of the engine crank with pull rope and watch for spark, then crank with electric starter and look for spark. The electric system may be killing the spark! It should not , but something has to be changing.
Customer: replied 2 years ago.
In addition to the positive and negative wires going to the starter, there is also a positive lead going to somewhere, what does this do?
Expert:  Curtis B. replied 2 years ago.
To the stator, to charge the battery.
Customer: replied 2 years ago.
The machine is now starting, it would appear that this wire was giving a poor connection.
When dis-connected - no start, when connected it starts
Expert:  Curtis B. replied 2 years ago.
Good job!