Please advise, I have a pair of 2001 225 hp Evinrudes. I was told that the spark plugs had to point to injectors or it would cut spark plug life in half. They are costly. In order to achive this I had ot tighten some of the plugs more than I have ever done on any engine before. Like realy lean on the wrench. Is there a trick to this or is this the way it is ? old plugs installed at dealer were very tight also. plugs came out at about .80 gap after one year and maybe 200 hours they should have gone in at .30 is this correct?