No problems to date with the 13hp Yanmar!
I have a 2GM in my 32ft Jeanneau Attalia. At one point I had battery problems and was anchored out (not enough power to turn the engine over). I tried cranking manually. I was never able to start it with a manual crank (with the handle that is provided) although I was able to turn the engine over by releasing the pressure. (fortunately it is a sailboat afterall
Not to hijack the thread but I was wondering if anybody ever managed to get a 2GM going with the manual crank? and if so how.