Tilt trim go up wont go down 2003 johnson 140 hp 4 stroke

SOURCE: my 1978 140 evinrude electric trim tilt motor

First make sure you are not in transit mode. Some outboards have a lever which keeps the motor tilted for trailering. You should have a fuse for the tilt motor, check that. If the pump is turning and it sounds like it is whining you are pushing air and either lost your hydraulic fluid or have an air bubble in the system. Check your fluid reservoir.

SOURCE: 9.9 johnson 4 stroke wo'nt idle

Your cabs need rebuild, something is stuck in the carb or air line cracked

If you have rebuilt the carb check for carb gaskett leak that caused and let the air flow in
When to choke is on the air is block and prevent air flow but allowed small amount of air to keep the engine running
After your engine warmed up the heat in the compression burn much faster so you have to let air in by turn off the choke
Good luck

SOURCE: Volvo-penta aq271c, trim will go down, but not up.no pwr at relay

First check the switch-- does it have power, then check the solenoid to see if it works-- there are two. One is for down, One is for up. If you get power from the solenoid-- outgoing-- check connections going to pump motor.

SOURCE: johnson 4 stroke 115 hp will not start. fuel

Sounds like and injector problem to me. If it was a 2 stroke I'd tell you to pull the carbs and clean them ,but EFI is a whole different story. Most certaintly a fuel problem, most likely injector related, you'll most likely need to go see a marine mechanic with the proper equipment to analyze, rather than start replacing parts you may not need.

SOURCE: how to service a tilt/trim on a 50 hp yamaha

To check the fluid level, tilt the motor up and engage the tilt lock lever. Open the bolt on top of the tilt/trim reservoir. The fluid should be even with the bottom of the bolt hole. If not add some fluid. When you put the bolt back in, run the trim up and down a few times. That should purge any air out of the system. Always be on the lookout for any leaking hoses or fittings. Hope this helped and best wishes.