bgsengine wrote:Me, too. I have never seen a coil do that. from the looks of things, probably gonna have to splurge and get a new carb - Ive seen THAT a lot on these machines - the surging is the clue - even the wondrous ultrasonic really cannot solve the issue because the carburetor itself is simply too lean. MTD actually has updated most of their carburetors (several times) used on these machines (and kits so to speak are NLA if they ever were) so best bet is to plan on getting a new carburetor.
Ive seen coils get hot and fail. But it is unlikely for coil to run for that long before failure, or cause a surge (despite a post earlier today where a shop *claimed* the coil was the problem)
Plugs , yes Ive seen them cause a hunting (but that was actually a lean misfire) and even plug caps (boots) , but never the coil itself, to date, and I'd be very surprised if it was actually the coil. I think the first thing to solve will be the surging problem, which, odds are excellent it will need a new carburetor, and once THAT is solved, the rest of the problems should take care of themselves.. and if not, then you've got 2 separate problems.
Josef wrote:Update: Good news. It kept running for about 3 hours of moving heavy wet snow, so the new carb has mostly taken care of things. I still need to figure out how to adjust the governor a bit because the rpm was staying a bit lower than it should – the engine was often lugging and laboring with the heavy snow (and even occasionally popped a mild backfire), and of course running slower means it doesn’t toss the snow as far.
A couple of more inches of snow are forecast to come tonight and more still Friday night (the weather folks aren’t predicting an amount yet for that other than 'less than today'). Heck of a winter so far.
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