What is the purpose of the fiber timing gear in these motors? Can it be replaced with an aluminum one? If it had been replaced with an aluminum, what problems might one encounter?
Sorry if they seem like dumb questions, but I am looking at buying a boat with a 120 in it and the owner said...
I have an old boat (1978), with a merc 140 (label on rocker cover), it is FWC, and the serial number is 3695234.
I have only had it for one and a half seasons and keep it moored all year in the chuck. Late last November I was going to head off fishing and had a hard time getting it started...
