I have a strange question that I can't figure out.1977 Johnson "sea king" 70 hp. One shift lever , forward , neutral, reverse and a fast idle lever. I give this information because I am new to outboards again and I too need all the information I can get. I just read cold starting Johnsons and found out pushing the key in is the choke. Sometimes the key won't shut the engine off when turned to off. And sometimes (nearly all the time ) when it wont shut off , touching certain parts of the control housing I get shocked with a very good "jolt" about like it was A/C current and not D/C current. How is this possible ?