As a landscape builder, he helped establish two gardening companies. Also the engine light was on for about a half a year. If you run into a carburetor issue that causes the chainsaw to overheat as well as bog down, you should repair the chainsaw quickly to prevent permanent damage to the engine. To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. You might end up idling for a longer period of time than you would in warm weather as the engine begins to warm up. The Fix: Replace the air filter. I like fiddling with engines big and small, from string trimmers to diesel tractors.