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post #1 of 19 (permalink) Old 04-26-2020, 07:37 PM Thread Starter
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Riding lawn mower just whines

Hello,
I have a
Model - 13AL78KT066
Troybilt Automatic TB46

I've replaced the starter solenoid, battery, oil, air and fuel filter. I've cleaned out the fuel lines and put fresh gas in my lawn mower. When I try to start the mower I'm just getting a whine.

Any help would be greatly appreciated!
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post #2 of 19 (permalink) Old 04-26-2020, 08:16 PM
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A whine is usually a bad solenoid... Did you replace the solenoid with a cheap one! Or a Troybilt part?
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post #3 of 19 (permalink) Old 04-26-2020, 08:41 PM
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Welcome to MLF Lawnuther. It sounds like you may have a sticking bendix on the starter. You could remove the starter and see if the bendix moves on the starter shaft when energized. Might just need a cleaning and lubrication.
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post #4 of 19 (permalink) Old 04-27-2020, 09:43 AM Thread Starter
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Quote:
Originally Posted by youngmech View Post
A whine is usually a bad solenoid... Did you replace the solenoid with a cheap one! Or a Troybilt part?
I typed the model number on Ebay and it said it was a genuine MTD solenoid. Photo attached.
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post #5 of 19 (permalink) Old 04-27-2020, 09:44 AM Thread Starter
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Quote:
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Welcome to MLF Lawnuther. It sounds like you may have a sticking bendix on the starter. You could remove the starter and see if the bendix moves on the starter shaft when energized. Might just need a cleaning and lubrication.
Thanks for the welcome and the advice. I'll give it a look today.
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post #6 of 19 (permalink) Old 04-27-2020, 10:42 AM
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post #7 of 19 (permalink) Old 04-27-2020, 07:54 PM Thread Starter
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Wanted to add this video which shows exactly what happens when I try to start my mower https://youtu.be/cdr3mSmebYE
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post #8 of 19 (permalink) Old 04-27-2020, 08:42 PM
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Try moving the flywheel by hand, one revolution ( with the ignition off for safety) and try starting it with the key switch. Does it make a revolution or two before stopping?

If it did rotate a few times and stopped, then quite possibly you need a valve adjustment. If it did not rotate, you may have a weak starter or low voltage to the starter. If you have a volt meter, see what the voltage is at the starter terminal when trying to crank the motor.

Will the motor turn quickly with the spark plug removed?

Experience is something you don't get until just after you need it.
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post #9 of 19 (permalink) Old 04-27-2020, 08:55 PM Thread Starter
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Quote:
Originally Posted by Grunt View Post
Try moving the flywheel by hand, one revolution ( with the ignition off for safety) and try starting it with the key switch. Does it make a revolution or two before stopping?

If it did rotate a few times and stopped, then quite possibly you need a valve adjustment. If it did not rotate, you may have a weak starter or low voltage to the starter. If you have a volt meter, see what the voltage is at the starter terminal when trying to crank the motor.

Will the motor turn quickly with the spark plug removed?
Thank you. I'll try this tomorrow. Appreciate everyone's responses.
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post #10 of 19 (permalink) Old 04-27-2020, 09:00 PM Thread Starter
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Quote:
Originally Posted by Grunt View Post
Welcome to MLF Lawnuther. It sounds like you may have a sticking bendix on the starter. You could remove the starter and see if the bendix moves on the starter shaft when energized. Might just need a cleaning and lubrication.
I was hesitant about removing the starter since I've never done one and didn't know how specific everything had to be upon reinstalling. I'll check out the starter tomorrow and take it apart. I'll just find a good video worse case scenario.
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