Want to add 12v electric start to 15 year old Snapper Hi-Vac

[bertsmobile1]

You will spend more time looking for an appropriate loom, removing it from the donor engine, repairing the damage then fitting it to your mower than simply adding the momentary switch & solenoid .
Then any loom with provision for battery starting will have several safety interlock switches which will either have to be bypassed on the new loom or fitted to the mower where there was originally nothing .
IT will be a lot more work.
But it is your mower & your time so good luck & good bye

 

[ken2]

I was a Snapper dealer for many years. The simplest way would be to order the correct on/off/ start key switch, starter solenoid, and wiring harness for your model Hi Vac. Unless prices have gone up a lot. $35 should do it.