Blades Slow Blades

[Small Town]

The blades on my walker mower slow down once I hit thicker grass. If I don't lock the blade engagement lever all the way up or disengage the lever a bit the blades will speed back up. There is no shear pin damage, and the gearbox oil level is fine. Any suggestions?

 

[noma]

Morning smalltown

Welcome to LMF and glad to have you here,hope you can solve someone else problem someday too. I think with your mower you have the blade belt to tight or to loose. Hows the belt tension spring good and working the way it should. I think it's some thing to do with your belt or belt tension or idler pulley on the belt? Might be something to do with that lever you move something war-out under there..:licking::licking::licking: