Question about Poulan 42-Inch Steel Deck 17.5 HP Briggs & Stratton I/C Engine With 6 Speed

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Replaced battery, replaced starter, replaced selinoid, poulan riding mower won't jump start or turn over, it turns slowly, but won't fire off and run

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It sounds like a valve timing problem. The valves need adjusting. This is a simple procedure, I assume it is a one cylinder, but the sequence is the same, the piston must be at top dead center, plug out to see this, and the valve cover off. Then check the gap between the valve stem and the rocker arms. The gap should be exact as per the instructions in your manual, or google the engine size and ask for the gap. Lets say the intake is 0.007 inches, you will need a feeler gauge and set the gaps. This does make a huge difference in your cranking ability because right now, from your description, you are cranking against compression as the valve timing is off. I have done this before and it works like a charm, like you have a new motor afterwards.

I hope this works or is of value to you.

Posted on Sep 21, 2009

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Let go to the basic your engine need fuel and spark to turn the engine on. Here is to check if you have spark and fuel spraying into combustion chamber. 1- After several cranks, take off a spark plug. 2- Inspect it to see - If it is wet, then you have fuel. - If it dry then you have no fuel. Here is a problem 3- When the spark plug is out, touch it to the engine chassis, then have a helper to start the engine, mean while you look at the spark plug to see if it spark. If there is not then here is the problem. If you have fuel and sparks then it is impossible to have engine not to turn on, unless you have poor compression ratio. However I still can help you in this scenario.

Posted on Sep 07, 2009


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1 Answer

My poulan pro lawn tractor won't start. when i turn the key it click's 1 time can you help ?

Have you checked the battery terminal connections? Is the battery charged fully? Are you sitting on the seat when you try to crank the mower? Could be any of the above but most likely battery connection or the battery is discharged or old.

Aug 20, 2012 | Poulan Pro Lawn Tractor 2006 and Newer...

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A safety feature appears to be stopping my mower from turning over

You will have at least 2 safety switches. One is the clutch/brake pedal activitated and the other is the seat switch. It sounds like the clutch/brake pedal switch is not allowing the starter to engage the flywheel and start the mower. Check for the switch under the footrest or near the back of the mower. Should be easy to find. Check it with an ohm meter and verify it is working. you could use a wire with 2 aligator clips to jump the switch but dont make this a permanent solution. Replace the switch if it is bad. One thing to consider is the ignition switch. Since you can jump the solenoid and the engine turns but wont run, you may have no power to the ignition/coil to fire a spark to the sparkplug. You need to turn the key to RUN and then jump the solenoid to confirm this. I think it will be one of those as the seat switch only kills the motor if the deck is engaged and the seat raises up. Let us know.

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1 Answer

Tractor won't turn over. Replaced Battery, starter and hotwire to starter getting smoking hot while trying to jump the tractor or start the tractor.

Is the engine free to rotate? Can you move it by hand? If not, the starter can't.
If so, try removing the plug and starting it.

Jul 24, 2011 | Troy Bilt 175HP Manual 42" Riding Mower

2 Answers

Hello, I have a question concerning a power Pro riding mover. It is about 15 years old but I have never really had any problems with it. Recently, it will not start or even turn over. I checked the...

Hi Bill

When you try to start it without the jump, does it turn, just click or do nothing?

Check the battery terminals for corrosion. Put a charge on it.
The battery could be at the end of its useful life

Has the mower been sitting idle for any length of time?

The gas may have gone bad.

With the aid of a jump, spritz a little starting ether or carb cleaner on to the carb and then try it. If it starts and dies, try it again.

If you can't get it to stay running, replace the gas.

Comment back with your findings.

Best rtegards,

Sep 16, 2009 | Garden

1 Answer

Engine will not turn over

If you can jump and start it, then ignition switch or circuit is faulty

Sep 10, 2009 | Garden

1 Answer

Will not start. Can jump accross the selinoid and

I assume that you are jumping the solenoid in order to bypass an ignition switch that is no longer operating?

If so, did you have the key turned to the run position?

You should not need to bypass any safety switches, just be sure that everything is in the normal starting position. (deck disengaged, in neutral, etc.)

Either way, it sounds like you have a bad ignition switch, or faulty wiring between the ignition switch and the solenoid.

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3 Answers

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