EETC Study Guide 2026

With the flywheel magnets aligned under the coil armature legs, a feeler gauge of the specified thickness is placed between them and the coil is tightened so it lightly grips the gauge.

Explanation: Two-stroke engines offer the benefits of lightweight construction and smaller size compared to their four-stroke counterparts. These characteristics make them desirable for applications where weight and space are significant considerations, such as handheld power tools, small recreational vehicles, and marine engines.

Clogged cooling fins restrict airflow and heat dissipation, causing the engine to overheat and potentially trigger its thermal protection shutdown.

Retarded ignition timing means combustion peaks too late in the power stroke, wasting energy as heat rather than pushing the piston, resulting in power loss and overheating.

As the piston travels upward from BDC to TDC, it creates a low-pressure area in the sealed crankcase, drawing the fresh air-fuel mixture in through the intake port. At the same time, the piston is compressing the air-fuel mixture that was previously transferred into the cylinder.

Modern diesel engines are heavily controlled by an Engine Control Module (ECM). Scanning for DTCs should be the first step, as a fault code can quickly direct the technician to the specific system (e.g., fuel pressure, sensor input, glow plug circuit) that is preventing the engine from starting, saving significant diagnostic time.