Don't use grease in the gearbox, use oil, and oil only. Use the right plug, and absorb completely the special information given hereafter about plugs in general . . . Don't do your first trip with a new engine under rush conditions, in front of a large audience. For instance, avoid a vital trip, catching the last of the tide, in a small dinghy, laden to the gunwales with gear and people, in half a gale in the pouring rain . Choose fine weather conditions . . .
Nobody feels entirely happy with a new piece of mechanism . . .
If you are going to run into trouble, it's much more likely to happen on your first trip or two, than at any other time. The engine is new, and a little stiff . . . The motor itself, like a human, will require some time to understand its new master . . . If you run into trouble, and want any help, write or telephone the manufacturers immediately . If the engine cuts out suddenly, without warning, whilst running, it's ten chances to one that it's plug trouble.