How to Troubleshoot a 1984 Evinrude Outboard Engine
- 1). Grip the fuel primer bulb and squeeze it to see if there is any resistance. If the primer bulb is hard, it means that fuel is not getting to the engine and the fuel line assembly may need to be replaced. Have a marine mechanic check this out for you. Check the fuel tank to see if there is sufficient fuel. Fill the tank, even if there is a small amount of fuel in the tank. Inspect all the fuel lines for kinks or leaks.
- 2). Remove the spark plug and check for excessive dirt or corrosion. Clean the plug with a sandblaster. Replace the spark plug if it is damaged.
- 3). Use a plastic bottle to pour a mix of fuel and oil directly into the carburetor intake if the engine will not turn over, even after you have primed the fuel bulb. Pull the starter cord at the same time until the engine turns over.
- 4). Check for any oil splatter inside the plastic motor cowling if the engine is lethargic or stutters. If there is oily residue, it could mean that the rings are failing, requiring a rebuild of the motor or replacement.
- 5). Inspect all the gaskets or seals, between the fuel pump and power-head for any wear and tear. If you notice any cracks or chipping in the seals, replace them. The seals are usually around 1/8-inch in thickness and they seal the oil and fuel inside the engine. If the gaskets are compromised, they could cause a vacuum leak inside the system and affect engine performance.
- 6). Inspect the system for fuel leaks. Remove the screw to the pump, with the engine off and grip the fuel primer. Check the small vacuum hole at the back of the pump for any leaks. If leaks are apparent, the diaphragm may need to be replaced. Have a mechanic investigate this further for you.
- 7). Check the fuel pump cowling for any cracks. If the fuel pump cover is compromised in any way, this could also be the cause of vacuum leaks when the fuel is primed.
- 8). Ensure that there is enough engine compression. Remove the spark plug and connect the compression gauge to the system. A normal reading is between 60 pounds per square inch (PSI) and 90 PSI. If the reading is less than this, the rings may be worn.