my fv342 has twin 6.2’s. My port started becoming very difficult to start after it’s sat for a week. I would crank the key and it would never start. Once I let off the key it would sputter and sometimes try to start. I’d work the throttle and it didn’t seem to really help but eventually I could get it to start. Once it ran for a bit it’s easy to start again. Now I’ve noticed it’s still doing that and also when going to give some gas it will start sputtering at about 1100rpm until about 2000rpm. Over 2000 it seems to run ok and act fine. I’ve replaced IAC and distributor cap. Both engines draw from both tanks. Fuel water superstore have not been changed but I would think that would affect it through your all rpm range. Also it doesn’t appear to be getting to Normal operating temperature. It gets to about 130 degrees while the other runs warmer by about 15 degrees or so. It also seems to want to idle high after coming off the throttle then levels itself out to normal idle rpm . Any thoughts?