I have a Toro 521, Model: 38052 Serial: 8008189. I was trying to start it today and could not get it started. This is the 1st issue I have had since I replaced the carb in 2014. I found the issue to be the carb is getting flooded. Pulled the carb off, took it apart & inspected it. Put it back together and tested the float and needle valve. I also threw the float in a container of gas when I had it apart to make sure it floats. I'm at a loss to what could be the issue.
I think you'll find your primer hose is bad. Remove it from carb, plug the hose and push the bulb. If you hear air hissing you'll need to make the necessary repairs.
Sent from my junky old Hisense 7" tablet that I can barely see.
Toro CCR 3650E
Toro 5/21 sold
Ariens 5/22 ss ..Sold
Ariens Sno Tek 7/24 sold.
Old green plastic snow shovel... Sent.to shovel Heaven
Old quarry shovel for ice.
Join Date: Feb 2015
Also make sure you are getting spark. Will the engine start with a quick squirt of starting fluid?
Current & Past Fleet:
2017 Husqvarna ST224 (SOLD)
2014 Troy-Bilt 2410 w/ Briggs & Stratton 305cc Engine
2003 Ariens ST824LE (SOLD)
1999 Toro PowerShift 824 w/ 318cc OHV Tecumseh Engine
1988 Toro 521 w/ 212cc Predator Engine
1985 Toro 3521 w/ 179cc Powermore Engine (SOLD)