Quote:
Originally Posted by young enthusiest
DO NOT SHUT OFF AN ENGINE WITH OUT LETTING IT COOL DOWN FIRST!!! after working, say mowing for a while, let the engine sit and idle for a minute or two to cool down. You will not have any backfiring issues and it will last a lot longer.
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This is good advice, it goes for all engines that are working under load.
things need a chance to stabilize, just like taking time to warm up a bit before going to full throttle.