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post #1 of 6 (permalink) Old 03-17-2020, 10:10 PM Thread Starter
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weird problem

Hi guys I was mowing and hit a big bump and the Poulan Pro PP19A42 died. I pushed the left pedal and it started up. Runs good and will run as long as I hold that left pedal down. As soon as I ease up on the pedal it dies. If I hold the pedal down and engage the blade, it dies. It starts instantly every time after it dies. My first thought was the seat switch but I bypassed it temporarily and it dies. I looked around the internet and they want to blame bad gas (nope) or a stopped up filter or junk in the carb so I will check those tomorrow but that seems unlikely to me. It has run fine for several years. Always starts instantly.

Any ideas? Its the Briggs intek engine
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post #2 of 6 (permalink) Old 03-18-2020, 12:57 PM
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Look on the engine and disconnect the mag ground wire, should be black, then try it. Sounds like a possible safety switch ground problem.
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post #3 of 6 (permalink) Old 03-19-2020, 08:31 PM
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Quote:
Originally Posted by pkerot View Post
Hi guys I was mowing and hit a big bump and the Poulan Pro PP19A42 died. I pushed the left pedal and it started up. Runs good and will run as long as I hold that left pedal down. As soon as I ease up on the pedal it dies. If I hold the pedal down and engage the blade, it dies. It starts instantly every time after it dies. My first thought was the seat switch but I bypassed it temporarily and it dies. I looked around the internet and they want to blame bad gas (nope) or a stopped up filter or junk in the carb so I will check those tomorrow but that seems unlikely to me. It has run fine for several years. Always starts instantly.

Any ideas? Its the Briggs intek engine
I think you pulled the wires to the safety switch

its acting as though you are trying to engage the blades while it in reverse safety or the clutch safety switch is the issue

I would think its pretty obvious to see where you hit something and investigate all related wiring there.

also the deck could have pulled on some wiring so you have to use you detective skills

You can only learn if you ask the question, so there are no dumb questions.
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post #4 of 6 (permalink) Old 03-20-2020, 12:44 PM Thread Starter
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Thanks guys I guessed it was a safety switch. I bounced on the seat hard when I hit the bump and thought I might have damaged that switch so I bypassed it. Before this, I saw that it kills the engine when I go in reverse without turning the key. Thats with the blades disengaged. Its supposed to only kill the engine while backing up when the blades are engaged. That suggests to me that its that switch that is the problem. I dont know where that switch is and its been raining hard and we have standing water so I'm not looking today.
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post #5 of 6 (permalink) Old 03-25-2020, 07:57 AM
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Sir, I know you said you bypassed the seat switch but I believe it may still be the culprit. What you're experiencing definitely sounds like a seat switch. I worked on several that did this exact same thing and it was always the seat switch.

Tango (Tom)
"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." - Orwell

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post #6 of 6 (permalink) Old 03-27-2020, 12:41 AM Thread Starter
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It took days, but it finally quit raining and I opened the magneto circuit. The mower is usable now. Thank You laabk2
Mark / Ohio likes this.
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