Posted by IndyFarmBoy on April 19, 2023 at 09:30:52 from (107.77.237.21):
Looking for some second opinions before I start the process of elimination. Have an Ariens S-16H with the ole Kohler single cylinder 16hp cast iron block boat anchor engine. It acts like it pings or predetonates really horribly. It does have an aftermarket carb. What it does is this: starts fine, runs fairly smooth for a Kohlooser, but as soon as it comes under any kinda load it starts knocking around like a suburban solicitor and pings itself until it dies. Now that said, sitting there at full throttle in Park, if I rev the throttle butterfly on the carb up by hand it doesn't have any issues. But any kinda rapid acceleration with the throttle lever or when the engine goes under any load, starts banging and knocking around like crazy. I checked the points gap and it was at 0.020. I know for all the things I hate about the Kohlers those cast iron engines will run even if they are dead and dont know it, could it just have that much blowby that it leaks past and causes insane back pressure? Clogged crankcase vent? Bad carburetur? Is my points timing wrong? Could it be the spark plug? Is there something I'm not thinking of? Any help is appreciated, its one of those, I'd love it to run but don't want to devote a bunch of time and money to making it run right.
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