Parts search shows 3. The OP will have to confirm.The 2720 doesn’t have glow plugs but an intake heater
Contact a John Deere dealer. If it is a diesel it sounds like it is normal for them to smoke and run rough at startup.Hi everyone,
Before I go and pull the head off of this thing I wanted to see if there were any other ideas. My 2720 is absolutely belching out smoke at cold start and kinda rumbles a bit, almost like it's not running on all cyls - it smells like unburnt diesel. It does clear up once up to operating temp and the tractor seems to run just fine with plenty of power. My first thought was stuck injector. I pulled the injectors, they didn't look great, at least to my untrained eye, so I replaced them. No effect.
Then I checked the valves - they are all within spec and no oil is getting by the valve seats. It "Smells" literally like a fuel issue, but I'm not sure what else it could be? I was thinking of pulling the head to check for scoring, like if there was a bad ring where oil was getting by, but it doesn't smell like burning oil to me - it smells like fuel. Any thoughts would be appreciated.