A strong fuel smell means fuel is escaping somewhere it shouldn’t. This guide covers the most common causes—leaks, stuck floats, venting issues, and loose lines—and how to fix them safely.

A burning smell during operation is a warning sign. This guide covers the most common causes—oil leaks, belt friction, electrical issues, and debris on hot surfaces—and how to fix them.

Black smoke means your engine is burning too much fuel. This guide explains the causes and the exact steps to fix a rich-running engine.

Blue smoke from the exhaust is a clear sign your engine is burning oil. This guide explains the causes and the exact steps to fix it.

White smoke from the exhaust is usually caused by excess fuel, moisture, or internal engine damage. This guide shows you how to diagnose and fix it.