I've used your picture as a reference to what i'm talking about but it's normally the RHS that craps out on the Honda's i've come across.
Sorry it's taken me a few days to get back to you guys, was transplanting a bunch of trees while the weather is still cool enough and then had a few call outs with the RFS to fight some grass fires (word to the wise it's THESE that will be the threats to many properties this year, so careful on your pileburns etc)
Anyway I checked that rear left (from the back, where you push it) joint that bigted pointed out and that weld still appears to be sound. If it were the cause of the rear left sag having replaced the spring with the steel rod wouldn't have actually done anything as the spring/rod connects the chassis to the height adjust arm only and so that read weld would still be a problem if that were the culprit.
One of the pix attached shows the temporary workaround I've been using for a few months (as this is my most used mower).
So sure enough I thought I'd chip away a bit of the mowing to be done (the kikuyu is just 'waking' from winter) in the last hour of light yesterday and I'd only 15mins more mowing to do and suddenly the front right wheel completely collapses.
See other pix attached - appears that the weld on this definitely has broken.
I don't believe this is the cause of the rear left sag but I'd say the former definitely assisted/exacerbated this. Anyway so now I suppose I will repair this first and then try and find where the issue is on the rear left.
Just wondering what the best way to repair it is? I am assuming I'd drill through the old weld, insert the end of the axle through and then reweld this.
My only concerns are whether enough of the axle will fit through to make a good joint and also how to ensure that the weld is done at the proper angle? i.e that front right wheel is locked in place and changes only when the height arm is changed.
Do I try and mirror the angle of the other front arm? So put it down in a known angle i.e flat and then copy this?
Apologies for using incorrect part names etc and appreciate in advance any thoughts/guidance. :-)