Engine Will Not Start

· Prime engine, (Cold - three times, Warm - 1 or 2 times)

· Fuel tank is empty.

· Stale or dirty fuel.

· Disconnected or dirty spark plug.

Engine Starts Hard Or Loses Power

· Dirty fuel tank cap vents.

· Stale or dirty fuel.

· Dirty air cleaner element.

· Disconnected or dirty spark plug.

Engine Runs Rough

· Carburetor needs to be cleaned.

· Disconnected or dirty spark plug.

· Dirty air cleaner element.

· Dirty cooling fins.

Engine Overheats

· Dirty blower housing and cooling fins.

· Improper oil level.

Engine Vibrates Too Much

· Loose blade bolt.

· Blade dull.

· Blade improperly balanced.

· Bent blade or crankshaft.

Mower Mows Unevenly

· Pushing mower too fast.

· Mowing too fast around corners and mowing pattern not changed.

· Insufficient overlapping of cuts when mowing.

· Blade dull or not balanced.

Bagging Chute Plugs

· Grass not dry.

· Cutting height not raised high enough.

· Dirty or full grass bag.

· Mowing too fast.

Mower Will Not Self-propel

· Traction belt broken.

· Traction belt jumped off pulley.

· JS63 Only, Adjust Transmission Cable

· Traction cable stretched or broken.

Mulched Grass Appearance Is Poor: Clumps, Excessive Clippings, Rough Cut, Etc.

· Grass buildup under deck.

· Travel speed too fast.

· Blade dull or not balanced.

· Cutting height set too low.

· Tall grass conditions may dictate that more overlapping of cuts is required.