Z421 Zero turn

[CharlieLH2]

Guys,
Do not know is this is proper forum, but here goes. I am trying to determine how many grease fittings (Zerks) are on my zero turn. I know of 1 at each front wheel, but that's all. I know some witty soul will tell me to count them, but I'm old, so give me a break please. There are none on the blade bearings. Also it seems mower is somewhat louder that in the past. Could there be a Zerk on the engine drive, the engine seems too loud after blades have stopped.
Thanks

 

[Lug66]

You found both zerk fittings, that's all of them. The seat rails / adjuster also gets greased (I use TFL50 Dry Film). The engine crankshaft gets a coat of copper based anti-seize every 500 hours.
Check your muffler for damage or loose attachment.