Honda G35 1975 Owner's Manual

The recommended oil type for the Honda G35 1975 engine is SAE 10W-30 or SAE 10W-40, depending on the ambient temperature.
It is recommended to change the oil every 100 hours of operation or at least once a year.
The correct spark plug gap for the Honda G35 1975 engine is 0.028 to 0.031 inches (0.7 to 0.8 mm).
First, check the fuel supply, spark plug condition, and battery charge. Ensure there are no blockages in the fuel line and that the spark plug is clean and properly gapped.
Regular maintenance includes checking and changing the oil, inspecting and cleaning the air filter, checking the spark plug, and ensuring all nuts and bolts are tightened.
To improve fuel efficiency, ensure the air filter is clean, use the correct oil grade, and regularly tune the engine. Avoid overloading the engine and ensure the carburetor is properly adjusted.
Common signs of wear include unusual noises, decreased power output, increased fuel consumption, and visible smoke from the exhaust.
To clean the carburetor, remove it from the engine, disassemble it, and clean all parts with carburetor cleaner. Ensure all passages are clear before reassembling.
To adjust the valve clearance, ensure the engine is cool, remove the valve cover, and use a feeler gauge to set the clearance to the manufacturer's specifications. Tighten the lock nuts securely.
To prevent rust, store the engine in a dry environment, apply a light coat of oil to metallic surfaces, and use a fuel stabilizer when storing the engine for long periods.