I bought a Toro ultra electric blower vac (model 51599 a year ago but never used it. Now that I need to use it I can't find what I did with the instructions. What do I have to do to attach the vacuum bag?

If you're Toro electric blower is slowing down, throwing sparks, or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!
There are Electric Motor replacement carbon brushes on E-bay for all three motor sizes (7 AMP, 10.5 AMP, and 12 AMP) of Toro Leaf Blowers (Toro Rake and Vac Super and Ultra Blower and "850" Vacuums)
Search E-bay for: "Toro Blower Carbon Brush"
- 12 Amp leaf blowers Toro Super (Old model 51552) through Toro Ultra (New model 51609).
- Toro 850 Super Blower Shredder-Vac 12 Amp (model 51575).
- 10.5 Amp leaf blowers Toro Old through Toro New model 51573.
- 7 Amp leaf blowers Toro model 51586 and other Toro 7 amp blowers.

If you're Toro electric blower is slowing down, throwing sparks, or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!

There are Electric Motor replacement carbon brushes on E-bay for all three motor sizes (7 AMP, 10.5 AMP, and 12 AMP) of Toro Leaf Blowers (Toro Rake and Vac Super and Ultra Blower Vacuums)

Search E-bay for: "Toro Blower Carbon Brush"

- 12 Amp leaf blowers Toro Super (Old model 51552) through Toro Ultra (New model 51609).
- 10.5 Amp leaf blowers Toro Old through Toro New model 51573.
- 7 Amp leaf blowers Toro model 51586 and other Toro 7 amp blowers.

If you're Toro electric blower is slowing down, throwing sparks, or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!

There are Electric Motor replacement carbon brushes on E-bay for all three motor sizes (7 AMP, 10.5 AMP, and 12 AMP) of Toro Leaf Blowers (Toro Rake and Vac Super and Ultra Blower Vacuums)
Search E-bay for: "Toro Blower Carbon Brush"

- 12 Amp leaf blowers Toro Super (Old model 51552) through Toro Ultra (New model 51609).
- 10.5 Amp leaf blowers Toro Old through Toro New model 51573.
- 7 Amp leaf blowers Toro model 51586 and other Toro 7 amp blowers

If you're Toro electric blower is slowing down, throwing sparks, overheating or not starting you may need to replace the carbon brushes. Replacing brushes and cleaning commutator early can prevent damage to motor armature!
There are Electric Motor replacement carbon brushes on E-bay for all three motor sizes (7 AMP, 10.5 AMP, and 12 AMP) of Toro Leaf Blowers (Toro Rake and Vac Super and Ultra Blower and "850" Vacuums)
Search E-bay for: "Toro Blower Carbon Brush"
- 12 Amp leaf blowers Toro Super (Old model 51552) through Toro Ultra (New model 51609).
- Toro 850 Super Blower Shredder-Vac 12 Amp (model 51575).
- 10.5 Amp leaf blowers Toro Old through Toro New model 51573.
- 7 Amp leaf blowers Toro model 51586 and other Toro 7 amp blowers.

If you take it apart there is a little spring on the bottom of the motor. When overheated it "trips" and looses contact with a wire. Need to reset the spring.

If it has not run for awhile, check the brushes. they might need to be replaced. The plug is usually moulded right on power cord. That might have to be replaced because if there is a problem with a broken or disconnected wire right at plug there is no way to see it. Hope this helps.

Go to toro.com. Put in your model number and i was able to find the manual at the Toro store.

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 the motor is worn out. Toro does not sell the motor separate. It is considered a throw away unit.
You will have to purchase a new one.
Sorry.
Good Day.

try some starting fluid and change the gas