need to get grounded

I rewired my whole boat, 78 ski nautique. I bought two bus bars about 5 " long from west marine. One is the neg bus bar under the dash and one is on top of the stringer next to the starter which has the neg from the battery connected to, that's the central point of negative.
All the neg wires- gauge to gauge to bus bar and any required negative wire from anything under the dash goes to that bus bar, from that I ran pretty low gauge wire from the other neg bus bar next to the starter. one low number gauge wire goes from the starter area bus bar to ( forgot this one ) a small bus bar mounted on the voltage reg/solenoid/ballast resistor mounting plate for lack of the correct term and from that neg goes the carb choke/ignition and I think the gas gauge, rear running light and blower neg. My thought is to keep it simple and easy to get to, keep as few connection points as possible. Yes power for the lights and neg for the gauges can be run form point to point then at the end of the string of connections ,,connect it to a single bus bar.

you may have the coil and/or dist wires connected wrong double check them.

if it turnsover but doesn't fire something is wired wrong in the ignition system.

If it doesn't turn over at all then then check and see if the breaker on the rear of the motor is tripped and the harness plug is fully seated together, see if you have 12V at the solenoid make sure the ground cable is connected.

What yr and make of engine?

push the read button on the rear of the motor. Get a multimeter and verify that you have voltage at the coil with the key on, but don't leave the key on very longyou'll burn up the points or electroincs which ever the case. Also check and make sure you have voltage at the solenoid located beside the curcuit break mounted to the rear center section of the engine.

there maybe a cover over it

I jumped the nutral safety switch and she cranked over, so thats the problem. I disconnected the quick release for the shifter cable when I installed the manifold. Now its either out of adjustment or I need a new switch. I can't think its the switch.