I've got a 2001 Suzuki DF25 four stroke that has just started missing under a load. It runs fine while idling, you can really feel a hesitation / miss when getting on plane. You can barely feel it once on plane and crusing. <br /><br />I've tried to check the plugs but it has plastic NGK covers on them and they seem to be on really tight. I'm afraid I'll break something if I pull too hard.<br /><br />Gas is fresh, I run it a least once every two weeks and have had no trouble till last week.<br /><br />Anyone have a suggestion on a repair manual for this motor?<br /><br />Any help is truly appreciated.<br />Thanks<br />Casey