How is the traction cable adjusted on Toro Model 20027, Serial # 20005663. I'm replacing the cable and the new one is slightly different from the old one, but the Toro shop tells me it's the proper replacement. They said there is an adjustment than can fix the difference in length, but the lady did not know how to make the adjustment.

no car told , no joy here
post to tools heavy or whatever.

find a shop get it fixed
or post video of all parts acting odd
for sure the blind an not guess what you see ever
my wild wild guess is tranny most not move (casing)
bad tranny
bad cable
adjusted wrong
missing or broken or rusted through parts.

incorrectly adjusted

That can be a tough one the cable that houses the throat cable is the secret to make it work. Look at your old cable and make sure it is in stalled in the same position and work backwards until it works . If the cable is not adjusted right you can not get full power.

"Most likely you'll have to remove the bowl nut, under the carb's bowl. You'll most likely find varnish in the jet, or maybe water. These are some typical jets, Tecumseh. Briggs, similar" (baymee LehighValleyPA, 2009).

I'm going to try this tomorrow myself!

Its a bit of a pain - but with ordinary tools, it can be done. Get the replacement cable first. You can see how the bottom spring wraps around the cable with a universal joint sort of arrangement. Remove the belt protector (three screws from the top deck; if you have a battery compartment, that will temporarily need to go. Release the old cable from the top and middle attachment points, then unhook the spring from the traction lever. You might need to destroy the old cable lock to the mower deck to remove the old cable. Remove the plastic cup next to the cable where it exits the mower deck. Replace parts in this order: New spring/cable to the traction lever, snap in plastic interface to mower deck, small plastic cup top cable attachment, then middle attachment. You might need to move the middle attachment after you give it a test run. Replace belt cover and battery compartment if necessary. A lot of steps but, except for a difficult fit to get the spring hooked up, nothing is really difficult. I paid about $30 for the replacement cable from a local dealer; Overpriced, but I wanted to get the job done today.

Belts will have spring tension on the idler pulleys.
Both traction and auger control cables will also have cable length adjustments to cause the travel of levers or idler pulleys to tighten belts. Adjustments are commonly located under the control panel/levers.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

The Mamco motor is WAY too much money.I bought brushes on E Bay and made them fit. #51591 takes 1/4 " square brushes.

Sounds like you may need to replace the pulley as well. It has likely worn out of specification.

I recommend that you contact your nearest authorized service center, or contact Toro directly for assistance.

I trust this information proves useful.

To adjust the self propel cable, loosen the cable
clamp, pull the cable downward to remove all the slack
then push the cable jacket up 1/8”
and secure with the cable clamp
good luck

Go to toro.com then customer care then manuals and parts type in model then find owners manual to download.