Originally Posted by
wingracer
6 is a good plug for that motor in most conditions. A 5 can really help idle and give a more crisp throttle response if the weather gets really chilly.
yea defiely when it gets cold outside you want a #5 nova plug they might be a little more money but they last pretty long even after break in they are good and also rich your top end neddle a bit also if its like 30 degress or 40