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Interesting. I think it might be time to invest in a mini oscilloscope like the ds213. I thought there might be a mouse (fluffy) in the muffler but it is not possible. thanks

The engine symptoms have changed and now cylinder 2 pops when running on one cylinder. I went through a few tests and the dynamic compression is way off on cylinder 2 from what I had originally. I don't know if I damaged something running cleaners (gumout/pb lmt) in the oil and cylinder. The...

I used gumout multi-tune in the oil and blaster lmt in cylinder 2. There could have been gas. I changed the oil 2 days ago and so far no gas smells or change in the oil level. I'm not sure how to pressure test the needle with the air vents going to the float bowl. The test I've seen is to turn...

Yes, the intake manifold bifurcates to two cylinders. There is only one outlet port.

I pulled the large nut off and the key looked perfectly straight. I bought keys just in case, but I didn't want to pull the flywheel if I did not have to. I should have replaced the float needle but it was $16. I don't see any issues with it flooding or running rich on the spark plugs. The...

Yes, I removed both kill wires when the coils were swapped. The tach did act up on both sides with the kill wires removed. Putting the spark tester inline was the only thing that stop the needle from swinging at high rpms on either side. I made markings on a plastic straw at or near tdc and...

The carb has only one throttle plate. The part number is 597128. Yes, I tried swapping the plugs back and forth with the coils and nothing changed.

I smoked cylinder 2 from the muffler pipe and I could not see anything leaking with a bright light. I also smoked the intake from the air filter connection, while plugging the vents with my fingers on the back, and there was no visible leaks. I use a diy paint can smoker which has worked on cars...

I tried swapping the coils and the afterfire did not move. I double checked it with the muffler off. Only cylinder 2 is popping out the exhaust.

I have an old nikki double barrel that's running rich on a Murray.

I ran it with the kill wires removed and it continued to backfire. I did not mess with the alternator rectifier(regulator) or the pto circuit.

Thanks. I'm just a diy with a few acres to cut. I still have a lot to learn. I did run the engine with the diode pack removed and the problem remained. I double checked the diodes with a meter according to the shop manual (273521) and they both passed. I cleaned and re-gap the armatures just to...

Hey All. I'm new to the forum so please excuse me if I mess up on any posting rules... I have a Husqvarna YTH24v48 with a Briggs & Stratton Intek V-Twin engine model 44N877-0003-G1 170815YG. I've been living with a persistent afterfire from the exhaust port on cyclinder 2 since August 2019...