I have one of the old original run of MDS engines, the 46 Blackhead. It's still going strong after 6 years of hard use turning an 11x7 APC prop on a GP Corsair. Had about 3 deadsticks in the first year but never another in the 5 oafter that. I've only changed the glowplug once, about 3 years ago. This is one h*lluva strong engine and idles lower than any other in this class that I've had. It always starts with a good prime and a single backflip of the prop.
They're not for sissies though....
Ok, just kiddin guys,
Heh, heh.....