Gaspar responds quickly to emails. Also there is a dealer in the UK, Rob Robotham, who could help.
So far I'm very impressed with my Merlin 90. It started up fine right out of the box and runs great with no unusual flames. This is my first kero start engine and the start sequence is about twice as long as what I'm use to, but I assume that's typical of kero start.
There are pictures of kero start Merlins on Jets-Munt's home page. The ceramic heater is internal and the only visible plug is the small one that plugs the old glow plug hole. Also it can easily be converted to propane start if you wish.
http://www.jets-munt.com/index.html?0.9988993077887046
Joe