Bit sparse on the text but the pics make up for that though (Ihope).

A Throttle Lock, I got the idea  from John C. MIG#626

I cut it out of 3mm thick PVC,  filed and sandpapered the edges of the "C"
so that it fits between the throttle and the switch-housing.

Fitted it with a small angle-bracket thatīs attached to the bottom of
the switch-housing by the screw that holds the throttle cable retaining bracket.
The thumb knob is a bit of plastic junk I found in my junk-box.

It works Great

Good Luck !!!

Kev
MIG#437

Throttle Lock

Throttle Lock

Throttle Lock