you need to clarify that - "only runs smooth at 140 degrees" doesn't match with "Once it warms up it runs fine" .... are you saying 140 is warmed up? what's your thermostat rating? are you using the choke? .... by "wont shift properly" do you mean the manual movement of the shift linkage is stiff?
Bill
Are you saying that it runs fine after it reaches 140 degrees? You said yes.
What temperature thermostat are you using? You said no thermostat at all? You need at least a 160 degree thermostat.
What do you mean by it doesn't shift properly? 3-speed or 4-speed transmission (original or a modification)? Does it shift poorly at all times?
