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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    I totally agree with safety and have no intentions of by passing any switches. At 64, I too have seen many tragedies from lack of attention or bypassing safety devices. My only thought was a 12v gear reduction servo could have served the same purpose to disengage the blades automatically with...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    StarTech Indeed it has an aluminum bowl. On the governor, "with motor off" I loosened the governor arm "throttle set to full" and tried to turn the shaft "through the motor" the same direction as full throttle on the arm. It was already as far as it could be turned. I assumed it was already...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Bert "prior" to installing the covers, but after I checked linkage/governor and started, I could watch the throttle butterfly. It did slow to an idle and rested against the idle screw. The engine was NOT (Put, Putting) as a too slow idle might be. Was generally purring as you probably would...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Couldn't let it go! I pulled the carb to make sure I had the linkage correct and it appears I did. I also found out I had not reinstalled the crank case breather tube. Then I attempted to adjust the governor arm but it was already set correctly "no adjustment was necessary" I reassembled it...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Slomo Couldn't tell which carb I have, don't know the difference. Took pic looking down on linkage and one showing connection to the governor arm. The choke works like it should. When you move the throttle to full, the governor arm gets stiff and the throttle butterfly arm is held open very...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Thank you slomo. Just finished doing all you suggested above except the magnaflux. Filed the journal edge next to key-way on the crank back to surface level. "Was standing a bit proud" Sanded the crank journal and flywheel with 220 paper by hand. Then used lapping compound and spun the flywheel...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    StarTech I thought I would post some pic's so everyone could kinda see what I see. My camera sucks but it should help. I'm not posting the pics to prove anything, just trying to help with info. I know just how hard it is to diagnose anything from words and lack of info/pics. I've done nothing...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Okay, so new update :) "Thanks for all the responses by the way" There is no washer on Flywheel now and none are called for in the parts list I've looked at for this engine. I went ahead and cleaned/inspected the fly wheel for cracks and couldn't find any. Just a little scaring from previous...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Not sure how to read the date StarTech.
  10. N

    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Yes, Torqued to 110 ft lbs actually, which is spec I found.
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Okay, I have to eat some "crow" here. "Raider820" was correct to check the Key on fly wheel again! As you can see from the pics below the flywheel was out of align again. I pulled the fly wheel and you can see the sheared key on left of third pic with new key on the right. Thanks for...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Sorry to all that replied for my late reply! I'm in Texas and the rain has prevented me from doing any thing to the mower yet. "Fish" I had the head off and checked the valves for sticking or bent valves. The seats were clean and they seem to function fine when engine is rotated. "Raider820"...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Dana, The "Cam shaft Gear" has ONLY one dot between two teeth so I'm sure that's correct! However the crank has "best I can tell from through scratches/scaring" a "tiny" dot on one of the teeth and several teeth away, a rectangular indent. I lined up the dots. I agree it acts like timing issue...
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    Briggs & Stratten 20HP won't start, backfiring through exhaust and carb.

    Hello All. Kinda Quick "complete" back story :), This is a 8yr old Ariens 46" riding mower with Briggs 331777-2372-G5 20HP OHV INTEK single cylinder engine. Given to me after it quit running. I suspected it had a broken rod and pulled the engine. The rod/cap was broken and no other damage to...
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