RY34000 trimmer. His neighbour gave it to my SIL after I said I couldn't get the carb adjusted to run consistent. Still can't. Have the carb in the USC now but I can't find gasket/diaphragm kit for it. It's a Ruixing carb. Have found after market carbs for $30 so might have to go that route if it won't run after USC and putting old stuff back on. Manual says to check valve clearance after 25 hours but chances are it been used less than that.
Manual also says this. No proof reader I guess.
Engine lubricant has a major influence on engine performance and service life. This unit is shipped with a 20W50 engine lubricant to assist in the break-in period. For best operating performance, continuing to use 20W50 engine lubricant is recommended, however, SAE 30, 10W30, or 10W40 are all acceptable lubricants to use in this product.Always use a 4-stroke motor lubricant that meets or exceeds the requirements for API service classification SJ. Check lubricant level before each use.
NOTE: Non-detergent or 4-stroke engine lubricants will damage the engine and should not be used.