If you have a fishing boat of your own, then we need to maintain the mainframe on the fishing boat. The specific maintenance methods are as follows:
Clean the exterior of the engine with clean water and thoroughly rinse the cooling water system. Allow the water to drain completely. Wipe off all surface water with an oily rag.
Discharge all fuel from the fuel line, fuel cock and vaporizer and clean the parts including the screen inside the fuel cock.
Disassemble the vaporizer, remove all internal dust and clean it with gasoline and compressed air.
Remove the spark plug and fill the engine oil with a spark plug or store the rust inhibitor. Pull the recoil starter handle several times to circulate the oil to the internal parts.
Apply grease to the propeller shaft.
Replace the gear oil in the gearbox.
Apply grease to all sliding parts, bolts and nuts.
Wipe off all water and salt from the electrical parts with a dry rag.