I have a new to me 1989 Cajun boat with a johnson 60 hp title says 89 model but according to the model number it's a 90 model. Model number J60TLESM. I need to know how to adjust the idle up just a little it idles fine on the muffs but when it's in the water sometimes it dies before I can take off. Runs great except for the idle. Did compression test 120 all three cylinders. Was trying to figure out a good downloadable repair manual for this engine also. Thanks in advance.