Probably just best to rebuild the carbs and fuel pump and replace all the fuel line in the motor. In my opinion cleaning a carb is just part of diagnostics
Honda is recommend to use 10W 30,
hard starting could be bad spark plugs, bad fuel, choke problem in the carb, yes you should have fast idle lever
Code 1 and 23 Or code 1 and 14 is common i have seen many once O2 sensor fail no proper combustion,so it will effect to other rough idle or knock, Never
does a 1972 100 hp johnson fuel pump have a diaphragm in it,,,,if it does I cant find one
Hi. New to Volvo Penta and this site but glad I found it
So I want to make sure I understand his correct.
Right hand rotation is better