Did you clean the carberator? There could be water in the gas tank, take it off, and empty it, then let it dry out, and try over again, check the oil for water too. Then check any seals that might be leaking. Hope this helps, good luck to you.
I Have A 1972 Simplicity Landlord 3410 Riding Mower And It Will Not Run. I Can Get It To Start And Run At Full Throttle For About 1 Minute And It Sounds Really Healthy And Soes Not Smoke. Then It Slows And Dyes. What Could It Be?
It may be the torque converter
Check to see if your float is working properly.
Check the fuel cap vent could be stoped up