Re: Dieseling SMTA

Posted by Mark on December 11, 2003 at 08:00:29 from (161.184.178.248):

In Reply to: Dieseling SMTA posted by Tom on December 11, 2003 at 07:08:41:

The only thing that causes "diseling" is hot spots in the cylinder igniting the fuel/air mix, carbon deposits mainly. The ignition system has nothing to do with it as it is shut down when the problems happen. How old are your plugs? lots of deposits on them? They are the hottest spot in the cylinder when the tractors running and therefore the most suspect to the dieseling problem. Happens alot when the tractor is used lightly for long periods then worked for a bit heating up the deposits, but not worked long enough to burn them off. Mixture may also be a little rich adding to the deposit preblem. A dyno is the place for carb adjustments and final timing setting.

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