If adjustment at shift lever is correct , take lower unit apart.----Inspect bronze bushing above pinion.---Inspect bottom bearing surface on driveshaft.---Insoect forward gear and clutch dog.
??----Plastic parts are cheaper to produce.-----It is all about being able to market a product for the showroom.----Not designed with future repairs in mind !!
Board room decision to promote 50:1 as the general public thinks "----if it can run at 50:1 mix it must be an improved motor "-----I say it all the time oil mixed with gasoline and 2 stroke lubrication is NOT well understood.