This inspection can give clues to what might be found inside engines (and cause) when it is disassembled.

• Check for buildup of dirt and debris on crankcase, cooling fins, grass screen, and other external surfaces. Dirt or debris on these areas can cause overheating.
• Check for obvious fuel and oil leaks, and damaged components. Excessive oil leakage can indicate a clogged or inoperative breather, worn or damaged seals or gaskets, or loose fasteners.
• Check air cleaner cover and base for damage or indications of improper fi t and seal.
• Check air cleaner element. Look for holes, tears, cracked or damaged sealing surfaces, or other damage that could allow unfiltered air into engine. A dirty or clogged element could indicate insuffi cient or improper maintenance.
• Check intake manifold throat for dirt. Dirt in throat is further indication that air cleaner was not functioning properly.
• Check if oil level is within operating range on dipstick. If it is above, sniff for gasoline odor.
• Check condition of oil. Drain oil into a container; it should fl ow freely. Check for metal chips and other foreign particles.