1991 70hp Rude.....<br /><br />All three carbs rebuilt with Bomb kits...Link and sync done by the book....upon checking idle timing found it to be 3d BTDC..book says it should be 3-5d ATDC...with that said the book also suggests i start the Low Speed Mixture Screw 1 turn out from full in...with the timing at 3d BTDC and SS screw at 1 turn out it idles fine but smokes alot...i'm running 100:1 in tank as well as VRO...usually do this for first tank on season...fresh gas and fresh oil....new tach installed and it's idling in gear in tank around 900 RPM now the water level is about five inches lower than if is was in lake.....with all of that said if i advance the idel timing to around 4d ATDC won't that increase the RPM's....the book tells me if the PRM's are too high to check "Induction System" for air leaks and repair as needed......how should i check this if indeed the timing advances the idle RPM...book tells me between 700-800 idleing in gear....hope you followed my rambling here.....<br /><br />Thanks in advance