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Hey guys - sorry for such a long post I'm just trying to be as thorough as I can be... I've had issues w/ my D160 in the past where it would run for ~15 mins then stall and needed to cool down before it would startup again. To fix that I've done the following: 1) replace the coil & wires (testing w/ Ohm meter it was slightly out of spec) 2) replaced the flywheel (teeth were worn) 3) replaced the starter (sounded terrible & didn't have enough power to crank the engine during compression, turned out 2 of the contacts were shot and the bearing/sleeve around the shaft was sloppy) 4) replaced sparkplugs (so I could read how it was running - turns out it's too rich) 5) replaced the points & condenser (because I thought this was the crux of the problem). When gapping the points I couldn't quite get them closed enough. I was wondering if perhaps the lobe on the crank is worn or maybe the pin that pushes the points was... In any case, I closed them as much as it would allow. 6) disassembled & cleaned the gas cap The above seemed to resolve that problem and it ran like a champ at full throttle and purred like a kitten at idle. It was running the best it has since I bought it 5 yrs ago and continued to work great for 15-20 plowings of my 1/8th mile driveway over the past month or so. I was psyched that it was running in top shape that is until yesterday... I was plowing snow drifts when it started sputtering. Not wanting to get stuck pushing I headed back to the house. By the time I got home (~700') it was really hurting and sputtering a lot. My friend gave me a hand today and here's what we did today: 1) cleaned the carb & verified no water present in the fuel/bowl 2) cleaned plugs & checked for spark. For having new points, condenser, coil, plug wires and plugs the spark doesn't seem all that strong / doesn't jump that far from plug to ground nor across properly gapped electrodes when plug is grounded. My friend suggested converting to an electronic/solid state ignition. I couldn't find one online. Does one exist for the Onan 16HP twin cyl? 3) adjusted high & low mixtures 4) verified ground by jumper cables from batter neg to plug 5) verified intake manifold is tight 6) readjusted the points & confirmed condenser was tightly grounded 7) confirmed oil level The way it sporadically cuts out then revs then cuts out seems to me like an ignition issue. It was also backfiring on occasion (also a sign of ignition issue?). It's consistently sporadic whether cold or warm. Other stuff that's been done over the past year: 1) replaced the ignition switch 2) carb has been rebuilt w/ new jet & gasket kit 3) fuel filter has been replaced 4) fuel pump has been carefully cleaned Thanks in advance for any suggestions/recommendations. Cheers!