Hello everyone! I am very new to this hobby!!!! I just bought my first boat (old 12' Sears, Gamefisher) and 4.5 Johnson Seahorse motor (model no. CJ5RHCOB) yesterday. From what I have been reading on this amazing site, I have a 4.5 or 5hp, recoil/rope starter, auxiliary fuel tank, 1985 year. Correct? I went out today and was having issues with keeping the motor primed and running. When the motor had fuel, it ran amazing (after being stored for over a year and a half), but at higher throttle it would slowly starve out and quit. After quitting and looking at my compressed(plastic) fuel tank I realized the tank needs to be vented!!! So, prime away I go again. Runs for 30 or so seconds, strong, quits again. Prime again, fires up first pull. This time I tried to coax it along by squeezing the primer bulb. This helped, but only a little. At slow throttle it would carry along but just barley. The issue I think I am having is a poor fitting connection on the tank and I am getting a small air/vacuum leak thus loosing the flow of fuel to the motor, or I have a bad or incorrectly installed(arrow points to motor) primer bulb. The motor uses more fuel than is being supplied. Therefore it quits. So if anyone can offer any input at all to my dilemma I would be very grateful!!! 
Thanks, Jason.
Thanks, Jason.