Brand new 2018 McCormick X1.45 with just 60 hours on it. The dealer forgot to bring the operator's manual when he delivered it and has promised to mail it, but haven't received it yet. At about 55 hours a weird warning light came on the dash. Called dealer, who said it was the exhaust light and I just needed to run it at higher RPMs to clear exhaust. I did (has been running about 1200 RPMS, so ran it up to 2000 RPMS) and it cleared temporarily but came on again and has been on ever since. Yesterday after a few hours running, it started making a terrible clanking noise, almost sounded like a rod knocking, so I immediately shut it off. Then decided maybe it was water in the fuel, so used additive to clear any chance of water and cleaned fuel pump. Now it won't start. Turns over and tries to fire, but immediately stalls. Suggestions before I call the dealer again??