I have probs with this engine at idle. It shakes and vibrates a lot at idle and often dies. I found that it sometimes idles better when I adjust the trim. Also I get a lot of vibration at diff speeds and trim it to where it's better but never get it perfect. i have a ss prop at 21 and a basic stock prop and not sure of the pitch. My tach is not working, is there a stock pitch that came with that motor when new? I don't need to get every last mph out of the motor I just want it to idle good and not vibrate at cruising speed (about 20-25 mph) does anyone have any suggestions? Also it's a 2+4 which means at idle only 2 of the 4 cylinders fire (which I do not like!). Thanks
