hey guys i have a 1972 65hp johnson, when i bought it it had no spark, put a whole ignition system on it harness and all,it crank up for a bit died and started backfireing out the exhaust. thanks to daviet i got it running and we took it out.it did alright,but the the exhaust is comeing out my prop,and not my ports at all! it does alright in the water, but it runs great on muffs? i think its from my exhaust not being able to breathe. but i dont even now how to check the exhaust on a outboard? any thoughts or help would be greatly appreciated thanks chad