That lime green Sullivan unit worked fine for me. I burned one out after several years and bought two more. I used to on TeeDees. I was actually a bit too powerful. I ran it up to full speed, then released the trigger and started the engine while it was coasting down.
One bit of advice, on those 12 volt power panels with fuel pump, glow driver and starter, don't use the starter and glow driver at the same time. The starter steals power from the glow driver. If you're using a plug that needs full boost you may have a problem.