Hi All: I have a 2019 25hp Yammy F25LWTC that is causing me grief. This has been a problem since new (yea... I know... but by the time I "knew" this was a problem... out of warranty, covid BS bla bla bla). Here is what I know:
The lower plug (2 cyl. 4 stroke) fouls after about 20 hours, the...
