RZT50 caked in oil
 

End of last mowing season I noticed the smell of burning oil and light smoke. Today I did an oil change and mowed for the first time and cleaned mower up a little. The entire deck the motor sits on was covered in the greasy substance the oil and the mixture of grass and dirt makes. The driveshaft pulley under the deck is caked as well. Also there is a distinct dark oil splat mark where oil has been coming out of the exhaust. I've done some research and seems a head gasket or possibly bearing seal is to blame. I pulled the carb and everything was normal.

It is quite possibly a head gasket, Matt. Did you happen to look at or remove the metal shrouds on your engine? After being stored all winter, mice like to build nests in those tiny little places. You could have gathered a nest and if you did not remove it at the start of the season, overheated your engine, blowing a head gasket or worse, warping a head. I hope it is just a gasket for you and a minor set back. LOL= Lots of Luck on your situation...

Cub Cadet 123

Which pieces are you referring to as shrouds? Unfortunately I have had issues with mice in my shed.

The metal tins that cover the heads and the flywheel shroud. Usually, after you start it for just a moment, the mice and mice nest shoot out and get hung up on the fins of the heads. If you leave them on there, then it prevents the engine from cooling properly since air does not pass freely over the heads. This heats them up and problems ensue.

Lots of ideas on how to keep mice away from engines on this forum. I have always had luck with old pantyhose filled with mothballs and garlic on top of the engine. Just remember to remove them before starting the engine or else your nose will be sorry.

Cub Cadet 123

Could possibly be my issue. I will check and report back. I’ve had problems with mice in my shed on other equipment.