Small Engines (Lawn Mowers, etc.): mower adjustments, grease zerk, throttle linkage

Question
my toro tv5002 comercial mower model# 22040. i bought this ol girl in 1996 i think. eight months out of the year she mows twice a week.starting to run rough and tranmission seems slower.soaked carb in gunk carburator cleaner already. how do i adjust the fuel mixture and the idle speed. can i adjust the tranny speed?

Answer
donald

The early Toro commercials (22035 is the predecessor to the 22040) 3 speed trans lacked the ability to "freewheel" backward. Not sure when they changed the design to freewheel backward, but I've had both versions. Check the simplest first - take the belt cover off and check the belt for proper operation. Then pop the cover off the trans and watch what happens as you pull on the bail bar. The commercial 3 sp. trans looks very similar to the consumer recycler 3 sp. trans but has heavier duty internals, a grease zerk fitting on the top of its case and "HD" stamped on the bottom. The engine kill is a simple design, pulling the throttle all the way back touches the throttle linkage to a coil wire down on the engine and grounds out the ignition, killing the engine. Its easy to see where this linkage touches the wire down on the mower and adjust the linkage accordingly. The 22035/22040 was the best 21" propelled mower ever built IMO and its 2 stroke Suzuki is a pleasure to operate. Well worth repairing even if you need another trans. for it.Adjusting the fuel mixture you need to remove the adjustment screw all the spray carb cleaner in the port, then close it completely do not force it on the seat,or else that will damage the tip. Back it out 1-1/2 turns that will give you a start,after it starts adjust the screw to get it to smooth out. The idle screw adjust to make sure it runs at a idle turn the screw 1-1/2 do not make it fast idle or else it will back fire when you shut it down.