Masport 550ST Series 19. How to tighten drive belt

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
  • / Masport 550ST Series 19. How to tighten drive belt
Could somebody help me ? I cannot see how to tighten the drive belt. Each one I put on falls off after a few hours.
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
64
Messages
24,705
  • / Masport 550ST Series 19. How to tighten drive belt
Go to manuals library and download the Masport " Rotary Mowers Service Manual "
Lots of nice detailed pictures of servicing the various self propelled .
 

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
  • / Masport 550ST Series 19. How to tighten drive belt
Thank you I have done that but my model is not there. Sarah.
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
64
Messages
24,705
  • / Masport 550ST Series 19. How to tighten drive belt
OK
I am a Victa Specialist and the shop up the road is a Masport dealer so I don't see very many of them.
I will have a poke around and see what I can find.
However I will need some more information
What engine does it have and what is the model number on the tag at the rear. normally in front of the catcher flap
Is it single speed, variable speed or gears and is it front or rear wheel drive
 

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
  • / Masport 550ST Series 19. How to tighten drive belt
Thank you so much. Really appreciate that. I will send some photos as well. It is self propelled. It has a Honda 160 engine. Rear wheel drive. That much I know. It is 550 ST Series 19. I will try and up load photos later. Thank you so much. Sarah.
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
64
Messages
24,705
  • / Masport 550ST Series 19. How to tighten drive belt
Series 19 = 19 inch cut
550 is the body style

The single speed rear drive should have an idler pulley that is mounted in a slot that you slide in& out to tension the belt.

The variable pulley has a spring but some times the sliding member sticks so the belt falls off when you try to increase the speed.
The swiveling gearbox style also has a tension spring
 

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
  • / Masport 550ST Series 19. How to tighten drive belt
This is what I have. A swivel gear box and this belt system attached to it. There seems no way of adjusting the tension here. There are to springs put the pulley does not move backwards or at all so I cannot see how the belt can be tension here. ???
 

Attachments

  • IMG_20210509_170019_820~2.jpg
    IMG_20210509_170019_820~2.jpg
    515.4 KB · Views: 6

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
  • / Masport 550ST Series 19. How to tighten drive belt
There is also nowhere underneath when I take blade plates of to adjust the belt tension.
 

bertsmobile1

Lawn Royalty
Joined
Nov 29, 2014
Threads
64
Messages
24,705
  • / Masport 550ST Series 19. How to tighten drive belt
There should be a slot on the side of the mower where the bearing housings is bolted on.
That is where the belt on the internally clutched box you have would be tensioned.
You should have loosened them to put the new belt on
If you just slipped the new belt on then it is too long.
This assumes the drive cable joins the lever in the same hole as the larger spring.
 

Chuzupop

Member
Joined
May 8, 2021
Threads
1
Messages
10
I will look do you know by chance what size belt it should be?
 
Top