Subaru EH63 Service Manual
![Subaru EH63 Engine manual cover](/images/OWLOcWVAtRimWDqLmeuyhRrH/thumbs/thumb175x175.webp)
The Subaru EH63 engine is best maintained using SAE 10W-30 or SAE 10W-40 engine oil. Be sure to check the oil level regularly and change it as per the maintenance schedule.
The air filter should be checked every 100 hours of operation and replaced every 200 hours, or more frequently if operating in dusty conditions.
For optimal performance, use NGK BPR5ES or an equivalent spark plug and ensure it is gapped correctly at 0.7-0.8 mm.
If the engine won't start, check the fuel level, ensure the spark plug is in good condition, and inspect the ignition system. Additionally, make sure the choke is properly engaged.
Regularly change the oil, inspect and replace the air filter, check the spark plug, and ensure the cooling fins are clean to prevent overheating.
Clean any debris from the cooling fins, ensure the oil level is adequate, and check for any blockages in the air intake system.
Start by locating the idle mixture and idle speed screws. Adjust these screws slowly while the engine is running until the engine runs smoothly at idle.
Drain the fuel tank, change the oil, remove the spark plug and add a small amount of oil into the cylinder, then pull the recoil starter to distribute the oil. Store in a dry location.
Ensure the air filter is clean, the spark plug is in good condition, and the carburetor is correctly adjusted. Regular maintenance will also help improve fuel efficiency.
Inspect the spark plug for wear, ensure the carburetor is clean and properly adjusted, and check for any air leaks in the intake manifold.